Eaton’s Cooper Power Systems catalog
Surge arresters
Surge
Arresters
Catalog information
Surge arresters catalog

Technical Data
Effective September 2014
Surge arresters
catalog contents
Contents
Description
Page
Improve system reliability with high cantilever strength
and expanded overvoltage protection (B235-11026). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
VariSTAR™ Type AZU heavy-duty distribution-class
under-oil MOV surge arrester (TD235001EN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Secondary arresters and protective gaps (TD235002EN). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
VariSTAR™ Storm Trapper™ secondary class MOV surge arrester (TD235003EN). . . . . . . . . 21
Storm Trapper™ H.E. (high energy) low-voltage
distribution-class MOV surge arrester (TD235004EN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Arrester/flipper fuse combinations (TD235005EN). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
UltraSIL™ polymer-housed VariSTAR™ IEEE® surge arresters; normal-duty
(5 kA), heavyduty, and riser pole (10 kA) for MV systems to 36 kV (TD235006EN). . . . . . . . . 41
VariSTAR™ Type AZL heavy-duty distribution-class MOV arrester (TD235007EN). . . . . . . . . . 57
VariSTAR™ AZS normal-duty distribution-class MOV arrester (TD235008EN). . . . . . . . . . . . . 65
VariSTAR Type AZE station-class surge arresters for systems
through 345 kV IEEE certified (TD235009EN). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
VariSTAR™ composite light-duty under-oil (CLU) MOV arrester (TD235010EN). . . . . . . . . . . . 89
UltraSIL™ polymer-housed Evolution™ (10 kA) IEEE®
surge arresters for MV systems to 36 kV (TD235011EN). . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
UltraSIL™ polymer-housed VariSTAR™ Type UI
intermediate-class surge arresters (TD235012EN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
UltraSIL™ polymer-housed VariSTAR™ station-class surge arresters (TD235013EN). . . . . . . 129
UltraSIL™ polymer-housed VariSTAR™ UXL high-strength
station-class surge arresters (TD235014EN). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
www.cooperpower.com
UltraSIL™ Polymer-Housed
VariSTAR™ Surge Arresters
Power Reliability
Improve system reliability with high cantilever
strength and expanded overvoltage protection
When the power stops,
everything stops. Protecting
your equipment from
damage or premature aging
due to lightning exposure
and other voltage surges
is important not only to
the equipment itself, but
also the reliability of your
system. The costs resulting
from data loss, equipment
damage, and company
stand-still can be greater
for the customer than direct
lightning damage. Utilities
spend millions annually
on substation outages and
resulting penalties from
regulatory agencies.
Optimal overvoltage
protection
Eaton’s Cooper Power Systems
UltraSIL™ polymer-housed
VariSTAR™ surge arresters
are an economical solution to
prevent lightning damage. The
three levels of energy handling
capability offered—standard,
high, and extra-high—are ideal
for protection against repeated
high energy switching surges,
and provide reliable protection for
substation equipment, capacitor
banks, multiple lines, and cable
circuits.
System reliability
Typical applications
Eaton’s Cooper Power Systems,
a leader in arrester technology,
has been providing high voltage
arresters for over 45 years. This
experience and expertise is
focused on increasing system
reliability with superior products
utilizing highly engineered
components to provide quality
that exceeds industry standards.
The UltraSIL polymer-housed
arresters provide the greatest
margin of protection for
equipment, unsurpassed by any
other solid-core design.
•
Protection of substation
equipment such as power
transformers or breakers
•
Protection of shunt capacitor
banks and capacitor switches
from excessive energies
caused by restrike or prestrike
conditions
•
Replacement protection for
aging substation equipment
•
The UXL family of arresters
is ideal for the overbuild
application due to the highenergy characteristics and
structural integrity required to
survive three fault conditions
Energy Handling and Cantilever Capabilities
Arrester Rating
3-108
Intermediate Energy
UIAA
3.9kJ/kV of MCOV/Uc
10,000 in-lbs
Standard Energy
USAA
3.9kJ/kV of MCOV/Uc
14,000 in-lbs
6.2kJ/kV of MCOV/Uc
20,000 in-lbs
High Energy
UHAA
6.2kJ/kV of MCOV/Uc
20,000 in-lbs
10.0kJ/kV of MCOV/Uc
35,000 in-lbs
Extra-High Energy
UXAA
10.0kJ/kV of MCOV/Uc
35,000 in-lbs
Extra-High Energy, High Strength*
UXLB
15.0kJ/kV of MCOV/Uc
80,000 in-lbs
Extra-High Energy, High Strength*
UXLC
NNote:
* Tested to Class H per IEEE Std C62.11™-2012 standard
120-240
240-360
15.0kJ/kV of MCOV/Uc
80,000 in-lbs
15.0kJ/kV of MCOV/Uc
80,000 in-lbs
15.0kJ/kV of MCOV/Uc
92,000 in-lbs
15.0kJ/kV of MCOV/Uc
92,000 in-lbs
Eaton’s Cooper Power
Systems has set a new
standard of excellence
in UltraSIL polymerhoused, station- and
intermediate-class
surge arresters. Higher
cantilever strength,
improved energy
handling capability,
increased creep
distance, and premium
line connectors provide
superior equipment
protection in a
lightweight polymer
arrester.
UltraSIL polymer housing
The UltraSIL polymer-housed
surge arrester uses the industry
preferred silicone rubber material.
Years of field experience
demonstrate that silicone
rubber will remain hydrophobic
in all types of environments,
a feature not found in all
polymeric materials. Independent
laboratories have verified the
superiority of 100% silicone
rubber for its resistance to:
•
UV degradation
•
Contaminated environments
•
Temperature instability
(+200 ºC to -70 ºC)
Perfect for harsh environments
Tested for use in the harshest
environments, the arresters
are tested in conformance with
1000 Hr salt fog test per IEEE
Std C62.11™ - 2012 standard.
The polymer-housed arrester not
only passed the standard testing
requirements, but showed zero
evidence of degradation to the
arrester housing. The increased
standard creep distance of 31
mm/kV (line to line voltage)
meets the requirements of
Category IV (very heavy)
pollution level per IEC 60099-4.
The increased creep reduces the
size of the arrester needed in
highly contaminated
environments such as:
•
Salt fog environments,
including coastal substations
•
Industrial and factory
applications, including mining
and steel mills
•
Renewable energy
applications, including solar
and wind farms
•
Road salt in colder climates
Higher cantilever strength
with solid core
UI, US, UH, UX and UXL arrester families
Metal Oxide Varistor (MOV)
blocks are the critical component
and have been refined over the
past 45 years. Cantilever ratings
are available for USAA, UHAA,
and UXAA families up to 35,000
inch-lbs, and UXL family up to
92,000 inch-lbs.
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
Cooperpower.com
© 2013 Eaton
All Rights Reserved
Printed in USA
Publication No. B235-11026
November 2013
Moisture impervious
composite matrix
Cast aluminum base
A high-strength composite
matrix encapsulates and
bonds the arrester’s internal
components and provides
structural integrity.
Moisture impermeability is a
unique characteristic of the
Eaton’s Cooper Power System
composite matrix material.
Unlike open weave or cage
designs, the solid layer created
by the composite matrix
eliminates all paths for moisture
penetration into the blocks. No
failures in the polymer arrester
family due to moisture ingress
have been reported since
its introduction - more than
350,000 in service. The moisture
impervious design features four
discreet sealing systems:
•
Glass collar disk
•
Composite wrap
•
RTV bonded Interface
•
Silicone rubber housing
Eaton’s Cooper Power Systems
arresters feature a high-strength,
highly engineered cast aluminum
base for added strength in harsh
environments.
The base utilizes industry
standard mounting bolt circles.
All arrester designs will mount
with standard ½” hardware.
Mounting options
High ampacity line terminal
Standard
NNote:
Suspension
Cubicle
Cubicle mount only available on
UI and US (3-36 kV) arresters.
Station-class part number
reduction - UIAA, USAA,
UHAA and UXAA
Impedance is critical to
arrester performance. As the
industry has moved to higher
impedance steel connectors,
Eaton’s Cooper Power Systems,
has standardized on a low
impedance option. The standard
line terminal option includes a
high strength, cast aluminum
four-hole pad. Galvanized mild
steel and bronze four-hole pads
are available as non-standard
options.
Eaton, Cooper Power Systems, and UltraSIL
are valuable trademarks of Eaton in the U.S.
and other countries. You are not permitted
to use these trademarks without the prior
written consent of Eaton.
IEEE Std C62.11™-2012 standard is a
trademark of the Institute of Electrical
and Electronics Engineers, Inc., (IEEE).
This publication/product is not endorsed or
approved by the IEEE.
All other trademarks are property
of their respective owners.
The base with retrofit capability
can easily convert from the
standard base mount to the
suspension or cubicle mount.
•
Only one product is needed
for three applications reducing the number of
unique part numbers needed
in stock
•
The tripod base can be
removed without impacting
the seal integrity of the
arrester design
For Cooper Power Systems
arrester product information, call
1-877-277-4636 or visit:
www.CooperPower.com
Technical Data TD235001EN
Effective September 2014
Supersedes 235-64 July 1995
VariSTAR™ Type AZU heavy-duty
distribution-class under-oil MOV
surge arrester
General
Eaton's Cooper Power Systems VariSTAR™
Type AZU under-oil MOV arrester is designed in
accordance with IEEE Std C62.11™-1987 standard
heavy-duty distribution class requirements. It is
designed for either horizontal or vertical mounting
inside the distribution transformer tank to eliminate
the difficulties associated with externally mounted
arresters.
In recent years, under-oil arresters have gained
increased acceptance due to the distinct advantage
the under oil environment offers. When placed
under oil the MOV arrester benefits from the
cooling effect of the circulating oil. In addition,
under-oil mounting of the arrester eliminates the
possibility of shortened arrester life due to high
surface contamination, wildlife, vandalism or
moisture ingress. The under-oil arrester also offers
improved transformer protection since internal
mounting eliminates the need for long lead lengths
to the arrester.
When properly coordinated with a current-limiting
fuse, cover retention can be maintained through
50,000 A of available fault current. The AZU underoil MOV arrester is available in ratings of 3 through
27 kV.
Production tests
A complete production test program ensures a
quality product. Each VariSTAR metal oxide varistor
receives a series of 100% electrical tests. Quality
is further ensured by a series of destructive tests
performed on every batch of varistors. Listed are
the tests that are performed on the varistors:
•
100% Physical Inspection100% Discharge
Voltage Test
•
100% V1mA/cm2
•
100% Leakage Current at 80% of
V1mA/cm2 Voltage
•
Batch High-current Short-duration Test
•
Batch Thermal Stability Test
Each AZU arrester must pass the following
production tests:
•
100% Physical Inspection
•
100% Leakage Current Test
•
100% RIV Test
TD235001EN-1
Technical Data TD235001EN
VariSTAR Type AZU heavy-duty distribution class under-oil MOV arrester
Effective September 2014
Features and detailed description
HIGH VOLTAGE LINE LEAD
#10 (19 strand) copper wire with
PVC insulation, 20 inch length.
NON-HYGROSCOPIC HANGER
High strength, track resistant
hanger brackets. (Brackets may
be separated for horizontal
mounting applications.)
INSULATIVE TUBE
RADIAL VENTS
Highly non-linear metal oxide
varistors provide exceptional
surge protection.
IDENTIFICATION INFORMATION
R
COOPER POWER SYSTEMS
MOV DISKS
AZU 10 kA
VariSTAR
10kV 8.4 MCOV
LINE END
Unique radial venting design
reduces arc energy should
an arrester failure occur.
Convenient reference for arrester
type, MCOV, voltage rating and
year and quarter of manufacture.
INSULATING WASHER
GROUND LEAD
#10 (19 strand) copper wire with
PVC insulation, 20 inch length.
Figure 1. Cutaway illustration of VariSTAR Type AZU100L Arrester.
NNote: Optional design available with adaptor terminals (see Figure 4).
Table 1. Protective Charateristics
Maximum Discharge Voltage
8/20 µs Current Wave
(kV crest)
MCOV
(kV rms)
Front-ofWave
Protective
Level*
(kV crest)
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
Switching
Surge**
(kV crest)
3
2.55
10.7
8.2
8.7
9.2
10.0
11.3
13.6
7.4
6
5.10
21.4
16.4
17.4
18.4
20.0
22.5
27.1
14.7
9
7.65
32.1
24.5
26.1
27.5
30.0
33.8
40.7
22.1
10
8.40
35.3
27.0
28.7
30.3
33.0
37.2
44.7
24.3
12
10.2
42.8
32.7
34.7
36.7
40.0
45.0
54.2
29.4
15
12.7
53.5
40.9
43.4
45.9
50.0
56.3
67.8
36.8
18
15.3
64.2
49.1
52.1
55.1
60.0
67.6
81.4
44.1
21
17.0
74.9
57.3
60.8
64.3
70.0
78.8
94.9
51.5
24
19.5
84.3
64.4
68.4
72.3
78.8
88.7
106.8
57.9
27
22.0
95.2
72.8
77.3
81.7
89.0
100.2
120.7
65.5
Arrester
Rating
(kV rms)
* Based on 10 kA current impulse that results in a discharge voltage cresting in 0.5 μs.
**45-60 μs rise time 500 A current surge.
Table 2. Performance Test Characteristics*
Description
Characteristics
Duty Cycle
20 current surges of 10 kA crest 8/20 µs waveshape followed by 2 current surges of 40 kA crest 8/20 µs waveshape
High-current, Short-duration Discharge
2 current surges of 100 kA crest 4/10 µs waveshape
Low-current, Long-duration Discharge
20 current surges of 250 A crest 2000 µs rectangular wave duration
* Per latest revision of IEEE Std C62.11™-1987 standard.
TD235001EN-2 www.cooperpower.com
VariSTAR Type AZU heavy-duty distribution-class under-oil MOV arrester
Technical Data TD235001EN
Effective September 2014
Table 3. Commonly Applied Voltage Ratings of the Type AZU
Arrester
Standards
The VariSTAR Type AZU arrester complies with the latest revision of
IEEE Std C62.11™-1987 standard, “IEEE Standard for Metal Oxide
Surge Arresters for AC Power Circuits”.
System Voltage
(kV rms)
Recommended Arrester Rating
(kV rms)
Nominal
Maximum
Four-Wire
Wye; MultiGrounded
Neutral
Three-Wire
Wye; Solidly
Grounded
Neutral
Delta and
Ungrounded
Wye
2.4
2.54
—
—
3
4.16Y/2.4
4.4Y/2.54
3
6
6
4.16
4.4
—
—
6
4.8
5.08
—
—
6
6.9
7.26
—
—
9
8.32Y/4.8
8.8Y/5.08
6
9
—
Eaton's Cooper Power Systems application engineers are available
to make application recommendations. The following information is
normally required:
12.0Y/6.93
12.7Y/7.33
9
12
—
1. System maximum operating voltage.
12.47Y/7.2
13.2Y/7.62
9
15
—
2. System grounding conditions.
13.2Y/7.62
13.97Y/8.07
10
15
—
A.
13.8Y/7.97
14.52Y/8.38
10
15
—
13.8
14.52
—
—
18
20.78Y/12.0
22Y/12.7
15
21
—
B.
22.86Y/13.2
24.2Y/13.87
18
24
—
23
24.34
—
—
27
24.94Y/14.4
26.4Y/15.24
18
27
—
27.6Y/15.93
29.3Y/16.89
21
—
—
34.5Y/19.92
36.5Y/21.08
27
—
—
General application recommendations
The rating of an arrester is the power frequency line-to-ground
voltage at which the arrester is designed to pass an operating
duty-cycle test. Table 3 provides a general application guide for the
selection of the proper arrester rating for a given system voltage and
system grounding configuration.
For four-wire circuits, grounding conditions depend upon
whether the system is multi-grounded, has a neutral
impedance and whether common primary and secondary
neutrals are used.
For three-wire circuits, grounding conditions depend upon
whether the system is solidly grounded at the source,
grounded
through neutral impedance at the source transformers,or
ungrounded.
Where unusual conditions exist (high ground resistance, high
capacitive load, arc-welding equipment, etc.) the following
supplementary information is necessary:
1. The unusual condition.
2. Type of construction, phase spacing, length of line, conductor
size.
3. BIL of equipment and line insulation.
1.7
4. Phase-sequence components of impedances on the load side of
the distribution substation.
1.6
The impedance of the transformer and the impedance and grounding
of supply to the substation all affect the voltage during faults.
Per Unit MCOV
1.5
Temporary overvoltage (TOV) capability
The Temporary Overvoltage (TOV) capability of the AZU arrester is
shown in Figure 2.
1.4
Per Unit Voltage Rating
1.3
Ordering information
To order an Eaton's Cooper Power Systems VariSTAR Type AZU
arrester, determine the arrester rating for the intended application
using Table 3 and specify the appropriate catalog number from Table
5. Contact your Eaton's Cooper Power Systems representative for
applications not listed.
1.2
1.1
1
0.9
0.1
1
10
100
1000
10000
TIME (Seconds)
Figure 2. Temporary overvoltage curve. No prior duty — 100 C
ambient.
1.7
1.6
Per Unit MCOV
1.5
www.cooperpower.com TD235001EN-3
Technical Data TD235001EN
VariSTAR Type AZU heavy-duty distribution class under-oil MOV arrester
Effective September 2014
Table 4. AZU Arrester Dimensional Information
Arrester
Rating
(kV rms)
1.87”
(47 mm)
“A”
3.0”
(76 mm)
Dimensions
A*
in. (mm)
B**
in. (mm)
3
4.8 (121)
5.0 (126)
6
5.9 (150)
6.1 (155)
9
7.0 (178)
7.2 (184)
10
7.0 (178)
7.2 (184)
12
8.2 (207)
8.4 (212)
15
9.3 (236)
9.5 (241)
18
10.3 (262)
10.5 (266)
21
11.5 (293)
11.7 (298)
24
11.5 (293)
11.7 (298)
27
12.7 (322)
12.9 (327)
* Dimension A from Figure 3.
** Dimension B from Figure 4.
Table 5. Catalog Numbers for AZU Arrester with 20" Line/
Ground Leads*
Figure 3. Dimensional information of VariSTAR Type AZU100L
arresters.
1/4-20
TERMINAL
STUDS
(BOTH
ENDS)
1.87”
(47 mm)
Arrester Rating
Catalog Number
3
AZU100L003
6
AZU100L006
9
AZU100L009
10
AZU100L010
12
AZU100L012
15
AZU100L015
18
AZU100L018
21
AZU100L021
24
AZU100L024
27
AZU100L027
* See Figure 3.
Table 6. Catalog Numbers for AZU Arrester Without Line/
Ground Leads*
“B”
3.0”
(76 mm)
.56”
(14 mm)
Arrester Rating
Catalog Number
3
AZU101L003
6
AZU101L006
9
AZU101L009
10
AZU101L010
12
AZU101L012
15
AZU101L015
18
AZU101L018
21
AZU101L021
24
AZU101L024
27
AZU101L027
* With adapter terminals (see Figure 4).
Figure 4. Dimensional information of VariSTAR Type AZU101L
arresters.
TD235001EN-4 www.cooperpower.com
VariSTAR Type AZU heavy-duty distribution-class under-oil MOV arrester
Technical Data TD235001EN
Effective September 2014
SYMM. ABOUT CL
.75”
(19 mm)
1.50”
(38 mm)
5.0”
(127 mm)
1.895” DIA.
(48 mm)
4.19”
(106 mm)
3.56”
(90 mm)
.375” DIA.
(10 mm)
6 PLACES
2.0”
(51 mm)
.375” X .562”
(10 X 14 mm)
SLOT
2 PLACES
.69”
(18 mm)
1.34”
(34 mm)
3.75”
(95 mm)
.50”
(13 mm)
.38”
(10 mm)
.75”
(19 mm)
.20” DIA.
(5 mm)
2 PLACES
Figure 5. Dimensional information of mounting bracket.
NNote: Hanger material thickness is 0.125 inches (3 mm). Dimensions given are for reference only.
www.cooperpower.com TD235001EN-5
Technical Data TD235001EN
VariSTAR Type AZU heavy-duty distribution class under-oil MOV arrester
Effective September 2014
This page is intentionally left blank.
TD235001EN-6 www.cooperpower.com
VariSTAR Type AZU heavy-duty distribution-class under-oil MOV arrester
Technical Data TD235001EN
Effective September 2014
This page is intentionally left blank.
www.cooperpower.com TD235001EN-7
Technical Data TD235001EN
VariSTAR Type AZU heavy-duty distribution-class under-oil MOV arrester
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235001EN
TD235001EN-8
Eaton, Cooper Power Systems, and VariSTAR
are valuable trademarks of Eaton in the U.S.
and other countries. You are not permitted to
use the these trademarks without the prior
written consent of Eaton.
IEEE Std C62.11™-1987 standard is a
trademark of the Institute of Electrical and
Electronics Engineers, Inc., (IEEE). This publication is not endorsed or approved by the
IEEE.
For Eaton’s Cooper Power
Systems VariSTAR surge
arrester product information
call 1-877-277-4636 or visit:
www.cooperpower.com.
Technical Data TD235002EN
Effective September 2014
Supersedes 235-10 January 1996
Secondary arresters and protective
gaps
General information
The necessity of providing surge arrester
protection on low-voltage circuits is fundamentally
the same as for primary system protection. While
secondary lines usually are shorter than primary
lines, they still are subject to surges which can
cause stresses beyond the insulation withstand
strength of connected equipment.
Secondary arresters
Type L
Type L secondary arresters protect street-lighting
controls, low-voltage relays, railroad-signal
circuits and circuits used for fire alarms, remote
metering and airport lighting. They are applicable
for voltages up to 175 Vac, or 125 Vdc and are
designed for indoor mounting. For general circuit
applications refer to Table 1.
Type S4
Type S4 secondary arresters are designed to
provide protection of low-voltage equipment,
secondary distribution circuits, control circuits and
signal circuits up to 650 Vac. These arresters are
designed for both indoor and outdoor use and a
typical application would be to protect long and
exposed secondary systems in oil fields or rural
areas.
Protective gaps
Protective gaps are auxiliary devices which serve
two purposes: (1) they isolate electrical equipment
during normal service conditions, and (2) they
provide a path to ground for surge current during
arrester operations. Protective gaps used for
interconnection of arrester ground, secondary
neutral, and transformer tank provide additional
protection to distribution transformers and improve
continuity of service to customers. Protective gaps
provide effective and inexpensive surge protection
for the primary neutral of a system (grounded
only at the substation) if the potential of the
primary neutral is less than 350 volts (rms) above
ground. Transformer tanks can be isolated from
ground under normal conditions by connecting the
transformer to ground through a protective gap.
TD235002EN-1
Technical Data TD235002EN
Secondary arresters and protective gaps
Effective September 2014
Features and detailed description
HOUSING
High strength thermoplastic provides
protection to internal components.
AC
175 V
DC
125 V
TYPE L
SECONDARY
ARRESTER
McGRAW-EDISON
SPARK GAP
Single spark gap designed to
give uniform and consistent
sparkover.
POWER SYSTEMS DIVISION
1992
VALVE ELEMENT
SEAL
Metal-Oxide valve element provides
exceptional surge protection.
A gasket between the housing
and base keeps interior of
arrester clean and free of
contamination.
TERMINALS
Plated brass straps, extending
from the underside of the base,
are slotted for easy mounting on
standard terminal blocks.
BASE
Molded phenolic provides both
strength and insulation.
Figure 1. Cutaway illustration of Type L (175 Vac, 125 Vdc) secondary arrester.
Table 1. Recommended Applications of Surge Arresters
System Voltage
Type
Rating*
120 volts
L
175 volts
120/240 volts
L
175 volts
120/240 volts Y
L
175 volts
240 volts
S4
650 volts
480 volts
S4
650 volts
600 volts
S4
650 volts
2.4 kV∆
Protective gap
6 kV
4.16Y/2.4 kV
Protective gap
11 kV
4.8 kV∆
Protective gap
11 kV
8.32Y/4.8 kV
Protective gap
15 kV
6.9 kV∆
Protective gap
15 kV
12.47Y/7.2 kV
Protective gap
15 kV
13.2 kV∆
Protective gap
15 kV
14.4 kV∆
Protective gap
15 kV
* An arrester rating represents the maximum line-to-ground voltage to which the arrester should be
subjected. Since surge arresters are inherently sensitive to overvoltages, they should never be subjected to 60 Hz voltages above their rated voltage, even during momentary abnormal conditions.
If such a condition is likely, a special system study may be necessary, and a higher rated arrester
may be required.
TD235002EN-2 www.cooperpower.com
440- OR 550-VOLT LINE
ø
N
TYPE S4 ARRESTER
TRANSFORMER
& BATTERIES
RELAYS
TO
ADJOINING
BLOCK
TO
ADJOINING
BLOCK
TYPE L
ARRESTERS
INSULATED TRACK SECTIONS
FIGURE 2. Railway application diagram showing an automatic
railway block signal control with Eaton's Cooper Power Systems
Type L secondary arresters. One arrester is used on each
outgoing line.
Technical Data TD235002EN
Secondary arresters and protective gaps
Effective September 2015
Type L secondary arresters
1.56"
Operation
Type L arresters protect low-voltage circuits and equipment against
surges by providing a low-impedance path to ground, and quickly
draining off surge voltages. The arrester promptly restores the circuit
to normal by interrupting the 60 Hz current which follows the surge
current.
1.88"
1.81"
Examples of applications of Type L secondary arresters are shown in
Figures 2 and 3.
1"
Standards
Type L arresters meet all requirements for the Association of
American Railroads (AAR) Signal Section Specification 52.51.
Impulse Sparkover
Uniform sparkover characteristics and a long life are assured by the
design of the spark gap of Type L arresters.
60 Hz Sparkover
Each Type L arrester is factory tested to assure a minimum 60 Hz
sparkover of 1100 volts. This sparkover value allows circuits to be
field tested with a 1000-volt megohmmeter without removing the
arrester from the circuits.
.25"
.63"
.5"
1.69"
3"
2.38"
1" GROUNDING LINK
Figure 4. Type L secondary arrester dimensional information.
120/240 VOLT LINE
CONTROL
STATION
HOUSING
High-strength,
wet-process,
glazed porcelain.
TYPE L
ARRESTER
(RELAY)
LAMP
CIRCUIT
Figure 3. A typical multiple street lighting control circuit
showing Type L secondary arresters protecting the relay coil.
SEALS
Arresters are
positively and
permanently
sealed by synthetic
rubber gaskets.
CONNECTIONS
Flexilble, 18-inch lead is
provided with most models
for connection to line.
Connection to ground lead
is made with clamp-type
terminal.
VALVE ELEMENT
Metal oxide varistor (MOV)
provides exceptional
surge protection.
Figure 5. Cutaway illustration Type S4, 650 V secondary arrester.
Discharge Capacity
AAR Specifications require a discharge capacity of 10,000 A on a
4 x 10 - microsecond wave. Type L arresters have passed
certification tests which require discharging two of these
surges without damage and complete recovery of all protective
characteristics.
Duty Cycle
Type L arresters subjected to duty-cycle tests of 22 successive
impulses of a 1500 A, 8 x 20 µs current wave show remarkably
consistent characteristics. Follow current is quickly and effectively
interrupted.
Discharge Voltage
Low-voltage signal circuit apparatus is designed to withstand a 60
Hz voltage of 4200 volts crest for one minute. Table 2 shows how
Type L arresters offer extra protection with very low discharge
voltages.
Table 2. Maximum Discharge Voltage (Crest
kV) 8/20 μs Current Wave
Arrester
Rating
1.5 kA
3 kA
5 kA
10 kA
175 Vac
125 Vdc
1.1
1.2
1.4
1.7
www.cooperpower.com TD235002EN-3
Technical Data TD235002EN
Secondary arresters and protective gaps
Effective September 2014
DISTRIBUTION
CLASS
ARRESTER
4.58"
.44" x .63"
MOUNTING
SLOTS
1.31"
1.94"
0.59"
3"
SIDE VIEW
SINGLE POLE OR DOUBLE POLE
LONG & EXPOSED
SECONDARY
CIRCUIT
2.94"
4.13"
FRONT VIEW – SINGLE POLE
TYPE S4
ARRESTERS
Figure 6. Typical application of Type S4 arresters protecting long
and exposed secondary lines in oil field or rural areas.
0.59"
5.31"
8.19"
9.38"
FRONT VIEW – DOUBLE POLE
Figure 7. Type S4 secondary arresters dimensional information.
Type S4 secondary arresters
Operation
Type S4 secondary arresters incorporate a gapless MOV design that
under steady state conditions maintains the line-to-ground voltage
across the arrester’s terminals. When overvoltages occur the Type
S4 arrester quickly goes into conduction, limiting the overvoltage
to required protection levels. Upon passage of the overvoltage
condition, the S4 arrester returns to a highly non-linear steady state
condition that conducts very minimal 60 Hz power current.
A typical application is shown in Figure 6. Dimensional information is
shown in Figure 7.
Discharge Voltage
Table 3 shows the discharge-voltage characteristics of the Type S4
arrester.
Table 3. Maximum Discharge Voltgage 8/20 μs Current Wave
(kV crest)
Protective gaps
For Interconnection Of Arrester Ground, Secondary Neutral,
and Transformer Tank
Interconnection provides additional protection to distribution
transformers and improves continuity of service to customers.
Advantages are particularly evident in areas subjected to extremely
heavy lightning surges and/or where soil conditions result in high
ground resistance values.
Without interconnection, surge voltage may build up high enough
to puncture the transformer insulation. Interconnection limits the
potential difference between primary and secondary windings
and between the primary winding and the transformer tank to
the discharge voltage (IR drop) of the primary arrester, plus the
impedance drop in the arrester leads. Many local electrical codes
require that interconnection of this type be made through gaps.
Rating
1.5 kA
3 kA
5 kA
10 kA
For Primary Neutral Protection
650 V
2.1
2.4
2.7
3.0
If the potential of the primary neutral of a system, grounded only
at the substation, is less than 360 rms volts above ground, Eaton's
Cooper Power Systems protective gaps provide effective and
inexpensive lighting protection. Gaps should be installed between
primary neutral and ground at each distribution transformer.
TD235002EN-4 www.cooperpower.com
Technical Data TD235002EN
Secondary arresters and protective gaps
Effective September 2015
For Isolation Of Transformer Tanks From Ground
A transformer tank connected to ground through a protective
gap is isolated from ground under normal conditions. The gap will
spark over and limit the voltage between the transformer tank and
windings during high-current lightning discharges.
Sparkover
Protective gaps are permanently adjusted at the factory to spark over
at voltages of 6, 11, or 15 kV rms. Arcing surfaces of both electrodes
are designed to assure consistent sparkover characteristics.
MOUNTINGS
Mounting bracket (not shown) has
a 0.56" hole for attachment to
transformer tanks, secondary
neutral terminals, or metal
structures. Caps can also be
suspended from a line conductor
by the top clamp-type terminal.
PROTECTIVE SEALS
Gaps are permanently
sealed with heavy
synthetic rubber gaskets.
SPARK GAP
Large, solid electrodes
handle high currents
without damage and quickly
dissipate heat from the
arcing surfaces.
Table 4. Sparkover Characteristics
System Voltage (kV)
60-Hertz
Sparkover
(kV rms)
Impulse
Sparkover
Crest (kV)
2.4 
6
11
4.16Y/2.4, 4.8 
11
17.5
8.32Y/4.8, 6.9 
15
25
12.4Y/7.2
15
25
13.2 ,14.4 
15
25
HOUSING
High-strength,
wet-process,
glazed porcelain.
Figure 9. Cutaway illustration of protective gap.
1.56 "
.56" DIA.
MTG.
HOLE
6"
DISTRIBUTION
ARRESTER
NOT OVER
350 VOLTS
AG1A22
AG1A23
AG1A24
Figure 8. Dimensional Information of protective Gaps.
PROTECTIVE GAPS
Figure 10. Typical application of protective gaps.
www.cooperpower.com TD235002EN-5
Technical Data TD235002EN
Secondary arresters and protective gaps
Effective September 2014
ORDERING INFORMATION
Secondary Arresters
Table 5. Type L-Rated 175 Vac, 125 Vdc
Standard Package
Description
Catalog Number
Qty.
Wt. of
Package
(lb.)
Arrester with 1”
grounding link
AS1B1
5
5
Arrester only
AS1B2
5
5
Table 6. Protective Gaps - Rated 6, 11, and 15 kV
Standard Package
Description
(60 Hz.
Sparkover)
Catalog Number
Qty.
Wt. of
Package
(lb.)
6 kV
AG1A22
1
1
11 kV
AG1A23
1
1
15 kV
AG1A24
1
1
Table 7. Type S5 - Rated 650 Vac
Standard Package
Description
Catalog Number
Quantity
Wt. of Package
(lb.)
Single unit w/o terminal cap,
w/o mtg. bracket with line lead
ASZ1A101
1
2
Single unit with terminal cap,
w/o mtg. bracket, with line lead
ASZ1A102
1
2
Single unit with terminal cap,
with mtg. bracket, with line lead
ASZ1A103
1
2
Double unit with terminal cap,
with mtg. bracket, with line lead
ASZ1A104
1
4
Single unit w/o terminal cap,
w/o mtg. bracket, w/o line lead
ASZ1A104
1
2
TD235002EN-6 www.cooperpower.com
Secondary arresters and protective gaps
Technical Data TD235002EN
Effective September 2015
www.cooperpower.com TD235002EN-7
Technical Data TD235002EN
Secondary arresters and protective gaps
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235002EN
TD235002EN-8
Eaton and Cooper Power Systems are valuable trademarks of Eaton in the U.S. and other
countries. You are not permitted to use the
these trademarks without the prior written
consent of Eaton.
For Eaton’s Cooper Power
Systems secondary arresters
and protective gaps product
information call 1-877-277-4636
or visit: www.cooperpower.
com.
Technical Data TD235003EN
Effective September 2014
Supersedes 235-15 November 2009
VariSTAR™ Storm Trapper™
secondary class MOV surge arrester
General
Eaton's Cooper Power Systems VariSTAR™ Storm
Trapper™ secondary class MOV surge arrester
is de­signed to provide overvoltage pro­tec­tion for
low voltage equipment and dis­tri­bu­tion circuits.
Storm Trapper ar­rest­ers are Canadian Standards
Association, CSA® listed for safety and comply
with IEEE Std C62.11™ -1993 standard "IEEE
Standard for Metal Oxide Surge Arrester for AC
Power Circuits."
Applications*
Storm Trapper surge arresters are avail­able in three
volt­age ratings:
175-Volt Arresters
The 175-volt arrester is de­signed for single-phase
120-volt ap­pli­ca­tions. It is available as single-,
double-, or triple-pole for two-, three-, or four-wire
systems.
350-Volt Arresters
The 350-volt single-pole arrester is de­signed for
in­di­vid­u­al application at sin­gle voltage source
in­stal­la­tions with line-to-ground voltages greater
than 175 volts and less than 350 volts.
The 350-volt two-pole device is designed for com­
mon three-wire 480/240 volt applications. The
350-volt three-pole unit pro­tects motors and other
equipment on three-phase systems which can
have a number of sys­tem voltages be­tween 175
and 350 volts.
650-Volt Arresters
The 650-volt arrester is designed for com­mer­cial/
industrial ap­pli­ca­tions where the line-to-ground
system voltage is great­er than 350 volts, but not
more than 650 volts.
Installation
The Storm Trapper arrester is mois­ture proof.
Refer to Service Instructions S235-15-1, MOV
Storm Trapper Secondary Class Surge Arrester
Installation Instructions for details.
* For service entrance applications, a higher energy device is
recommended. Refer to Eaton's Cooper Power Systems Storm Trapper
High Energy Arrester in Catalog Section TD235004EN.
TD235003EN-1
Technical Data TD235003EN
VariSTAR Storm Trapper secondary class MOV surge arrester
Effective September 2014
Production tests
A complete production test program assures a quality product. Each
VariSTAR metal oxide varistor receives a series of 100% electrical
tests. Quality is further ensured by a series of destructive tests
performed on every batch of varistors. Listed are the tests that are
performed on the varistors:
•
100% Physical In­spec­tion
•
100% Discharge Voltage Test
•
100% V1mA/cm2
•
100% Leakage Current at 80% of V1mA/cm2 Voltage
•
Batch High Current Short-Duration Test
•
Batch Thermal Stability Test
Each Storm Trapper arrester must pass the following production
tests:
•
100% Physical Inspection
•
100% Reference Voltage (Vref)
•
100% Vacuum over Fluid Seal Test
•
100% Radio Interference Voltage Test (RIV)
Table 1. Protective Characteristics
Arrester
Rating
MCOV
Maximum Discharge Voltage 8/20 µs Current Wave
(kV crest)
(V rms)
(V rms)
1.5 kA(a)
3 kA(a)
5 kA(a)
10 kA(a)
10 kA(b)
175
350
650
175
350
650
1.1
1.6
2.2
1.2
1.7
2.4
1.4
1.0
2.7
1.7
2.3
3.1
3.1
3.5
4.0
(a) 1.5" Leads.
(b) 18" Leads.
TD235003EN-2 www.cooperpower.com
Technical Data TD235003EN
VariSTAR Storm Trapper secondary class MOV surge arrester
Effective September 2014
Features and detailed description
LEAD WIRES
No. 14 Awg, 19 strand, tinned
copper, 18 inches long,
600 volt insulation
1/2 -14 THREADED
MOUNTING SHAFT
For attaching to a
standard fuse/breaker
box knockout hole.
EPOXY POTTING
Provides a weatherproof seal of the leads
from the housing.
1/2 -14 THREAD LOCKNUT
MOV DISKS
Highly non-linear, metal oxide
varistors provide exceptional
surge protection.
2.88"
(73 mm)
2.25"
(57 mm)
2.0"
(51 mm)
.19" (5 mm)
1.0"
(25 mm)
BUILT-IN SLOTS
Accommodates two
mounting screws for
horizontal or vertical
mounting.
.25" (6 mm)
3.66"
(93 mm)
4.0"
(102 mm)
WEATHERPROOF HOUSING
Assures a lifetime of moisture
resistance with a moistureproof ultrasonic seal.
TOP VIEW
1.45"
(37 mm)
.25" (6 mm)
FRONT VIEW
Figure 1. Cutaway Illustration of Storm Trapper Arrester
NNote: Dimensions are given for reference only.
Table 2. Performance Test Characteristics*
Description
Characteristics
Duty Cycle
20 current surges of 1.5 kA crest 8/20 µs waveshape followed by 2 current surges of 1.5 kA
crest 8/20 µs waveshape
High Current, Short
Duration Discharge
2 current surges of 10 kA crest 4/10 µs waveshape
* Per IEEE Std C62.11™-1993 standard.
Table 3. Insulation Characteristics
Arrester Rating
(V rms)
1.2/50 µs Impulse
(kV crest)
1 min. Dry
(kV rms)
10 sec. Wet
(kV rms)
175
10
6
6
350
10
6
6
650
10
6
6
www.cooperpower.com TD235003EN-3
Technical Data TD235003EN
VariSTAR Storm Trapper secondary class MOV surge arrester
Effective September 2014
.50
(12.7 mm)
.18 DIA
(4.57 mm)
2- HOLES
1.50"
(38 mm)
LEAD WIRES
.18
(4.57 mm)
.09 R
(2.29 mm)
1.75"
(44 mm)
LOCKNUT
.82
(20.83 mm)
.18
(4.57 mm)
MOUNTING
BRACKET
.37 DIA
(9.40 mm)
.18
(4.57 mm)
.28
(7.11 mm)
.28
(7.11 mm)
ARRESTER
HOUSING
.68
(17.27 mm)
Figure 2. Side View of Storm Trapper Arrester with Mounting Bracket
Table 5. Storm Trapper Catalog Numbers
Ordering information
Arrester
Rating
(V rms)
Number of
Poles
Catalog Number
without Mounting
Bracket
Catalog Number with
Mounting Bracket
175
175
175
350
350
350
650
650
650
1
2
3
1
2
3
1
2
3
ASZ175B1
ASZ175B2
ASZ175B3
ASZ350B1
ASZ350B2
ASZ350B3
ASZ650B1
ASZ650B2
ASZ650B3
ASZ175B11
ASZ175B21
ASZ175B31
ASZ350B11
ASZ350B21
ASZ350B31
ASZ650B11
ASZ650B21
ASZ650B31
To order an Eaton's Cooper Power Systems
VariSTAR Storm Trapper secondary class
MOV surge arrester, determine the voltage
rating for the intended application using
Table 5 and the ap­pli­ca­ble wiring diagram
per Figure 3. Specify the appropriate catalog
number from Table 4. Contact Eaton's
Cooper Power Systems sales en­gineer in
your location for ap­plications not listed.
Table 4. Commonly Applied Voltage Ratings of the Storm Trapper Arrester
System Configuration
Phase/Wiring
Single-Phase/Two-Wire
Single-Phase/Three-Wire
Three-Phase (ungrounded)/Three-Wire
Three-Phase (one-phase grounded)/Three-Wire
Three-Phase (one-phase center-tap grounded)/ Four-Wire
Three-Phase/Four-Wire
Storm Trapper Arrester
Voltage
(Volts rms)
MCOV*
(Volts rms)
Number of
Pole(s)
See Wiring Diagram
(Figure 3)
Catalog**
Number
120
240
480
600
240/120
480/240
240
480
240
480
240/120
480/240
208Y/120
480Y/277
175
350
650
650
175
350
350
650
350
650
350
650
175
350
1
1
1
1
2
2
3
3
2
2
3
3
3
3
1
1
1
1
2
2
3
3
4
4
5
5
6
6
ASZ175B1
ASZ350B1
ASZ650B1
ASZ650B1
ASZ175B2
ASZ350B2
ASZ350B3
ASZ650B3
ASZ350B2
ASZ650B2
ASZ350B3
ASZ650B3
ASZ175B3
ASZ350B3
* Maximum continuous operating voltage (MCOV) is the maximum designated rms value of power frequency voltage that may be applied continuously between the terminals of the arrester.
**Mounting bracket option available. Add suffix 1 to change catalog number (Example: A5Z175B11).
TD235003EN-4 www.cooperpower.com
Technical Data TD235003EN
VariSTAR Storm Trapper secondary class MOV surge arrester
Effective September 2014
LINE
LINE
GROUND OR
NEUTRAL
VOLTAGE
GROUND OR
NEUTRAL
120 V
(240 V)
240 V
(480 V)
LINE
WHT
WHT
BLK
BLK
Wiring Diagram 2:
Single-phase/three-wire system.
Wiring Diagram 1:
Single-phase/two-wire system.
LINE
LINE
LINE
240 V
(480 V)
LINE
240 V
(480 V)
WHT
240 V
(480 V)
LINE
240 V
(480 V)
240 V
(480 V)
GROUND OR
NEUTRAL
BLK
WHT
240 V
(480 V)
BLK
GROUND
Wiring Diagram 4:
Three-phase (one-phase grounded)/three-wire system.
Wiring Diagram 3:
Three-phase (ungrounded)/three-wire system.
LINE
LINE
208 V
(480 V)
240 V
(480 V)
LINE
120 V (240 V)
GROUND
120 V (240 V)
LINE
WHT
240 V
(480 V)
240 V
(480 V)
BLK
120 V
(277 V)
208 V
(480 V)
208 V
(480 V)
120 V
(277 V)
120 V
(277 V)
LINE
LINE
WHT
BLK
GROUND
Wiring Diagram 5:
Three-phase (one-phase center-tap grounded)/four-wire system.
Wiring Diagram 6:
Three-phase/four-wire system.
Figure 3. Wiring diagrams.
NNote: Black leads to line: white leads to ground.
Voltage between a white lead and any black lead should not exceed the arrester MCOV.
www.cooperpower.com TD235003EN-5
Technical Data TD235003EN
Effective September 2014
TD235003EN-6 www.cooperpower.com
VariSTAR Storm Trapper secondary class MOV surge arrester
VariSTAR Storm Trapper secondary class MOV surge arrester
Technical Data TD235003EN
Effective September 2014
www.cooperpower.com TD235003EN-7
Technical Data TD235003EN
VariSTAR Storm Trapper secondary class MOV surge arrester
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235003EN
TD235003EN-8
Eaton, Cooper Power Systems, VariSTAR,
and Storm Trapper are valuable trademarks of
Eaton in the U.S. and other countries. You are
not permitted to use the these trademarks
without the prior written consent of Eaton.
IEEE Std C62.11™-1993 standard is a
trademark of the Institute of Electrical and
Electronics Engineers, Inc., (IEEE). This publication is not endorsed or approved by the
IEEE.
CSA® is a registered trademark of Canadian
Standards Association.
For Eaton’s Cooper Power
Systems VariSTAR Storm
Trapper surge arrester product
information call 1-877-277-4636
or visit:
www.cooperpower.com.
Technical Data TD235004EN
Effective September 2014
Supersedes 235-16 November 2009
Storm Trapper™ H.E. (high energy)
low-voltage distribution-class MOV
surge arrester
General
Eaton's Cooper Power Systems Storm Trapper™
H.E. (High Energy), low-voltage distribution-class
surge arresters are designed to provide surge
protection at distribution transformer secondary
bushings.
The Storm Trapper H.E. arrester is the industry's
first low-voltage distribution-class arrester and has
successfully passed all design tests for light duty
distribution class arresters per IEEE Std C62.11™
-1993 standard.
Years of research by Eaton's Cooper Power
Systems in low-voltage secondary circuits
concluded that the types and magnitudes of
surges that can exist in these circuits are more
severe than previously thought. The Storm
Trapper H.E. arrester, born out of this research,
was designed to reliably handle the stresses
found in these low-voltage circuits. The research
further noted that transformer failure rates
can be significantly reduced by adding surge
protection to transformer secondary bushings.
Field experiments in some of the most severe
lightning areas of the United States has shown
that transformer failure rates can be reduced to
far below 0.1% by applying Storm Trapper H.E.
arresters to transformer secondaries.
Top image depicts external mount. Bottom row,
left to right, displays metal enclosed and internal
mount.
Features
The Storm Trapper H.E. family of arresters
incorporates the highest energy handling Metal
Oxide Varistors (MOV) when compared to other
arresters promoted for similar applications. This
superior energy handling ability assures long
service life even in the most severe service
conditions. Storm Trapper H.E. arresters were
designed with a full 40 kA surge withstand
capability, four times the level of traditional
secondary arresters.
The durable MOVs used in the Storm Trapper
H.E. arrester are manufactured by Eaton's Cooper
Power Systems at our ISO 9001 certified plant
in Olean, New York. This allows constant QA
monitoring to assure that only the highest quality
high energy MOVs get selected for use in Storm
Trapper H.E. arresters.
TD235004EN-1
Technical Data TD235004EN
Storm Trapper H.E. MOV surge arrester
Effective September 2014
Features and detailed description
GROUND ELECTRODE
Provides convenient
reference for arrester type
and voltage rating. Year and
quarter of manufacture are
permanently marked.
STORM TRAPPER H.E.
LOW VOLTAGE
DISTRIBUTION SURGE ARRESTER
IDENTIFICATION
INFORMATION
COOPER POWER SYSTEMS
MOV DISKS
Arrester design provides a
high energy 40 kA highcurrent, short duration and
5 kA duty cycle rating in
accordance with the lightduty, distribution-class
arrester requirements of
IEEE Std C62.11™ -1993
standard.
SPRING
Ensures high pressure
continuous contact.
SEALING COMPOUND
Fully potted arrester ensures
a lifetime moisture-proof
seal.
Storm Trapper R H.E.
1/ -14 THREAD (Locknut
2
Provided)
For attaching to a standard
fuse/breaker box knockout
hole.
BLACK LEAD WIRE
Indicates connection to an
energized line.
WHITE LEAD WIRE
Indicates connection to
ground or neutral.
Figure 1. Cutaway Illustration of external mount Storm Trapper H.E. arrester without mounting bracket (two pole model illustrated).
Designs
The Storm Trapper H.E. arrester is available in three design
configurations: external mount, metal-enclosed, and internal mount.
All external mount and metal-enclosed Storm Trapper H.E. arresters
are CSA® Listed for safety.
Standard line and ground leads on the external mount and metalenclosed designs are 18 inch, #10 AWG stranded copper. The line
leads that are connected to the energized source come with black
wire insulation while the ground lead has white insulation. The
length of the line and ground leads play an important role in the
protective ability of the arrester. The longer the leads are, the higher
the voltage let through to the protected equipment. Thus to improve
the equipment protection, it is strongly recommended that all line
and ground leads be kept to the minimum required length.
enclosed Storm Trapper H.E. arrester has successfully passed 60
Hz. fault current tests exceeding 35 kA as a non-fragmenting device.
The metal housing contains an indicator window which blackens
in the unlikely event of arrester failure, noting the need for arrester
replacement. As with the external mount Storm Trapper H.E.
arrester, ratings of 175, 240, 480 and 650 volts in one, two and
three pole designs are available with or without a mounting bracket.
Internal mount Storm Trapper H.E. arrester
The internal mount Storm Trapper H.E. surge arrester is designed
for under-oil application within distribution transformers for the
overvoltage protection of the secondary bushings.
This design is available in a two pole, 480 volt rating which can be
ordered with or without ring terminal mounting lugs.
External mount Storm Trapper H.E. arrester
Production Tests
The external mount Storm Trapper H.E. arrester is designed for
connection to, and protection of, the secondary bushings of
overhead distribution transformers or other low voltage equipment.
The external mount Storm Trapper H.E. arrester has been designed
for outdoor application with a weather resistant housing over a
fully-potted, void-free inner chamber. Identification information is
permanently molded or stamped into the housing of the arrester
for full lifetime readability. Arresters rated 175, 240, 480 and 650
volts are available in one, two and three pole designs. An optional
mounting bracket is also available.
A complete production test program assures a quality product. Tests
are performed on the completed arrester assemblies.
Metal-enclosed Storm Trapper H.E. arrester
The metal-enclosed Storm Trapper H.E. arrester provides nonfragmenting performance by fully encapsulating an external mount
Storm Trapper H.E. arrester in a stainless steel housing. The
TD235004EN-2 www.cooperpower.com
•
100% Physical Inspection
•
100% Reference Voltage Test (Vref)
•
100% Radio Interference Voltage Test (RIV)
Each MOV disk receives a series of tests.
•
100% Physical Inspection
•
100% 5 kA Discharge Voltage
•
100% V1mA/cm2
•
100% Leakage Current at 80% of V1mA/cm2
•
100% Batch High Current Short-Duration Test
•
100 Batch Thermal Stability Test
Technical Data TD235004EN
Storm Trapper H.E. MOV surge arrester
Effective September 2014
2.20''
(56 mm)
.187"
(4.7mm)
DIA. HOLES
(4 PLACES)
1.83''
(46 mm)
1.20''
(30 mm)
1.37''
(35 mm)
.54''
(14 mm)
.56 x 2.50
(14 x 64 mm)
(SLOT)
4.75''
(121 mm)
4.14''
(105 mm)
.96''
(24 mm)
FRONT VIEW
SIDE VIEW
Figure 2. Dimensional information for external mount Storm Trapper H.E. arrester (shown with optional mounting bracket).
NNote: Dimensions are given for reference only.
Table 1. Protective Characteristics
Front of Wave Protective
Level* (kV Crest)
Maximum Discharge Voltage (kV crest)
8/20 µs Current Wave
Arrester
Rating
(V rms)
MCOV
(V rms)
Maximum Energy
Capability
(Joules/Phase)
5 kA
1.5 kA
5 kA
10 kA
20 kA
40 kA
175
175
3226
1.7
1.4
1.6
1.8
2.0
2.4
240
240
3405
1.8
1.5
1.7
1.9
2.2
2.6
480
400
3776
2.0
1.7
1.9
2.1
2.4
2.9
650
540
4660
2.6
2.1
2.4
2.6
3.0
3.6
* Based on a current impulse that results in a discharge voltage cresting in 0.5 µs.
Table 3. Performance Test Characteristics*
Table 2. Insulation Withstand Voltages
Arrester Rating
(V rms)
1.2/50 Impulse
(kV crest)
1 min Dry
(kV rms)
10 sec Wet
(kV rms)
All Ratings
10
6
6
Description
Characteristics
High-current,
Short-duration
2 discharges of 40 kA crest, 4/10 µs current wave
Low-current,
Long-duration
20 surges of 75 A-2000 microsecond duration
Duty Cycle
22 operations of 5 kA crest, 8/20 µs current wave
* Tests were performed in accordance with applicable sections of IEEE Std C62.11™ -1993
standard (Metal Oxide Surge Arresters for Alternating Current Power Circuits).
www.cooperpower.com TD235004EN-3
Technical Data TD235004EN
Storm Trapper H.E. MOV surge arrester
Effective September 2014
2.49''
(63 mm)
2.56''
(65 mm)
1.37"
(35 mm)
1.97''
(50 mm)
STAINLESS
STEEL
BOX
AIR
FULLY
POTTED EXTERNAL
MOUNT STORM
TRAPPER H.E.
4.75''
(121 mm)
4.25''
(108 mm)
Storm Trapper® H.E.
FAILURE
INDICATOR
WINDOW
FRONT VIEW
SIDE VIEW
Figure 3. ­Dimensional information for metal-enclosed Storm Trapper H.E. arrester (shown with optional mounting bracket).
2.67''
(68 mm)
1.50''
(38 mm)
.56''
(14 mm)
5.12''
(130 mm)
TOP VIEW
.51''
(13 mm)
1.65''
(42 mm)
.88''
(22 mm)
1.12''
(28 mm)
1.9''
(48 mm)
SIDE VIEW
Figure 4. Dimensional information for internal mount Storm Trapper H.E. arrester (shown with optional terminal lugs).
NNote: Dimensions are given for reference only.
TD235004EN-4 www.cooperpower.com
Technical Data TD235004EN
Storm Trapper H.E. MOV surge arrester
Effective September 2014
Temporary overvoltage (TOV)
capability
The ability of the Storm Trapper H.E.
arrester to withstand 60 Hz temporary
overvoltage conditions is graphically shown
in Figure 5. The graph shows for a given
voltage magnitude (on a per unit of MCOV
basis), the time an arrester can survive a
TOV condition without going into thermal
runaway.
1.6
PER UNIT OF MCOV
1.5
1.4
1.3
1.2
1.1
1
0.1
1
10
100
1000
10000
TIME (Seconds)
Figure 5. Temporary Overvoltage Capability.
Ordering information
To order an Eaton's Cooper Power Systems
Storm Trapper H.E. arrester, determine the
arrester Maximum Continuous Operating
Voltage (MCOV) rating for the intended
application and specify the appropriate
catalog number from Table 4 or 5.
Contact Eaton's Cooper Power Systems
representative for more information.
Table 4. Internal Mount Storm Trapper H.E. Arrester Selection
Catalog Number
Storm
Trapper H.E.
Arrester
Type
Voltage
Rating
(V rms)
MCOV
(V rms)
Number
of Poles
With
Terminal
Lugs
Without
Terminal
Lugs
Internal Mount
480
400
2
ASZH480U200*
ASZH480U202**
* 10 inch leads
**24 inch leads
www.cooperpower.com TD235004EN-5
Technical Data TD235004EN
Storm Trapper H.E. MOV surge arrester
Effective September 2014
Recommended arrester applications
Table 5. Storm Trapper H.E. Arrester Selection
Storm
Trapper H.E.
Arrester
Type
Voltage
Rating
(V rms)
MCOV
(V rms)
Number
of Poles
Catalog Number
Without Hanger
Bracket*
External Mount
175
175
1
ASZH175C100
Metal-Enclosed
175
175
2
ASZH175C200
175
175
3
ASZH175C300
240
240
1
ASZH240C100
240
240
2
ASZH240C200
240
240
3
ASZH240C300
480
400
1
ASZH480C100
480
400
2
ASZH480C200
480
400
3
ASZH480C300
650
540
1
ASZH650C100
650
540
2
ASZH650C200
650
540
3
ASZH650C300
175
175
1
ASZH175E100
175
175
2
ASZH175E200
175
175
3
ASZH175E300
240
240
1
ASZH240E100
240
240
2
ASZH240E200
240
240
3
ASZH240E300
480
400
1
ASZH480E100
480
400
2
ASZH480E200
480
400
3
ASZH480E300
650
540
1
ASZH650E100
650
540
2
ASZH650E200
650
540
3
ASZH650E300
* To order an arrester with mounting bracket change the last digit from a 0 to a 1.
(Example: Change ASZH480C200 to ASZH480C201)
A
B
C
2 / POLE
480V
400V
TD235004EN-6 www.cooperpower.com
LOW VOLTAGE
DISTRIBUTION SURGE ARRESTER
Figure 6. Location categories in low-voltage circuits.
COOPER POWER SYSTEMS
ASZ4C1
RATED
MCOV
METER
INDUSTRIES
COOPER
PRIMARY
CIRCUIT
PANEL
IEEE Std C62.41™ -1991 standard, IEEE® Recommended Practice
on Surge Voltages in Low-Voltage AC Power Circuits, defines three
areas of low voltage service from the distribution transformer
secondary bushings down to electrical outlets within a home or
business. (See Figure 6.)
Storm Trapper H.E. arresters are designed for use in category C
locations. Category C applications include use on transformer
secondaries.
Outlets and long branch circuits are considered category A. Typically,
category A overvoltage protection has been limited to plug-in style
voltage suppressors.
Storm Trapper H.E. MOV surge arrester
Technical Data TD235004EN
Effective September 2014
This page intentionally left blank.
www.cooperpower.com TD235004EN-7
Technical Data TD235004EN
Storm Trapper H.E. MOV surge arrester
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235004EN
TD235004EN-8
Eaton, Cooper Power Systems, and Storm
Trapper are valuable trademarks of Eaton in
the U.S. and other countries. You are not permitted to use the these trademarks without
the prior written consent of Eaton.
CSA® is a registered trademark of Canadian
Standards Association.
IEEE Std C62.11™ -1993 and IEEE Std
C62.41™ -1991 standards are trademarks
of the Institute of Electrical and Electronics
Engineers, Inc. (IEEE). This publication/product
is not endorsed or approved by the IEEE.
IEEE® is a registered trademark of the Institute
of Electrical and Electronics Engineers, Inc.
For Eaton's Cooper Power
Systems Storm Trapper H.E.
MOV surge arrester product
information call 1-877-277-4636
or visit: www.cooperpower.
com.
Technical Data TD235005EN
Effective September 2014
Supersedes 235-25 September 1997
Arrester/flipper fuse combinations
General
Eaton's Cooper Power Systems offers a wide
variety of arrester/flipper fuse combinations.
Flipper fuse assemblies can be ordered as a
stand alone kit, or in combination with a variety of
distribution-class surge arresters. These packages
combine the functions of a transformer mounted
arrester and an open link fuse assembly to provide
users effective overvoltage and overcurrent
protection with a minimum of pole­-top hardware.
Lightly loaded distribution systems with low
available fault currents are ideal locations for these
combinations. Current ratings of the flipper fuse
assembly include a continuous current rating of
50 A and an interrupting rating of 1200 A.
Arresters in these packages can be ordered with
silicone rubber (UltraSIL™) or porcelain housings,
while the internal design is gapless MOV
(VariSTAR™). Additionally, arresters are available in
normal- or heavy-duty distribution classifications.
With these multiple options, customers can order
an arrester/flipper fuse combination to fit almost
any system application.
All surge arresters supplied in these combinations
have been tested to, and meet or exceed, all
the requirements of the latest revision of IEEE
C62.11™, “IEEE Standard for Metal-oxide Surge
Arresters for Alternating Current Power Circuits”.
Graphics on the left show the arrester/flipper
fuse combination with an UltraSIL silicone rubber
housed arrester and on the right a porcelain
housed arrester. Below are the component parts,
AM21A1. Please note, fuse links are not included
with these packages. For information on available
fuse links, see Eaton's Cooper Power Systems
catalog section K-SEC 100.
TD235005EN-1
Technical Data TD235005EN
Arrester/flipper fuse combinations
Effective September 2014
Flipper fuse kits
Customers who need a flipper fuse kit without an arrester can order
this kit separately. The kit includes both flipper arms (for attachment
to the arrester and the transformer bushing) and an optional
insulated wildlife protector for the transformer bushing. Refer to
Figure 3 for a view of the complete flipper fuse kit (including the
optional wildlife protector) and Table 1 for a listing of the correct
catalog numbers for ordering these kits.
FUSE LINK
5.31"
Table 1. Flipper Fuse Kit Catalog Numbers
Description
Catalog Number
Flipper Fuse Kit
AM21A1
With Bushing
AM21A1
Insulator Cap
AM21A1
Flipper Fuse Kit
AM21A2
Without Bushing
AM21A2
Insulator Cap
AM21A2
A
B
TOP VIEW
9
2.50"
14
3
5
1 10
C
180
Figure 1. UltraSIL
13 housed arrester/flipper fuse assembly.
NNote: See Table 3 for the referenced dimensions.
FUSE LINK
5.31"
A
C
1"
B
2.50"
4.12"
Figure 2. Porcelain housed arrester/flipper fuse assembly.
NNote: See Table 4 for the referenced dimensions.
TD235005EN-2 www.cooperpower.com
Technical Data TD235005EN
Arrester/flipper fuse combinations
Effective September 2014
Table 2. Arrester/Flipper Fuse Ratings and Catalog Numbers
Flipper Fuse Ratings
Arrester
Rating
(kV, rms)
Arrester
MCOV
(kV, rms)
Arrester
Design
Type
Arrester
Housing
Material
Continuous
Current
(A)
Interrupting
Current
(A)
Catalog Number
9
7.65
VariSTAR, Normal Duty
UltraSIL
50
1200
UNS0905-OK1C-1D1A
10
8.40
VariSTAR, Normal Duty
UltraSIL
50
1200
UNS1005-OK1C-1D1A
18
15.3
VariSTAR, Normal Duty
UltraSIL
50
1200
UNS1808-OK1C-1D1A
9
7.65
VariSTAR, Normal Duty
Porcelain
50
1200
AFZS103M9R
10
8.40
VariSTAR, Normal Duty
Porcelain
50
1200
AFZS103M10R
18
15.3
VariSTAR, Normal Duty
Porcelain
50
1200
AFZS103M18R
9
7.65
VariSTAR, Heavy Duty
UltraSIL
50
1200
UHS0905-OK1C-1D1A
10
8.40
VariSTAR, Heavy Duty
UltraSIL
50
1200
UHS1005-OK1C-1D1A
18
15.3
VariSTAR, Heavy Duty
UltraSIL
50
1200
UHS1808-OK1C-1D1A
9
7.65
VariSTAR, Heavy Duty
Porcelain
50
1200
AFZL103M9R
10
8.40
VariSTAR, Heavy Duty
Porcelain
50
1200
AFZL103M10R
18
15.3
VariSTAR, Heavy Duty
Porcelain
50
1200
AFZL103M18R
Ordering information
Additional information
Figures 3 and 4 show outline drawings for UltraSIL and porcelain
housed arrester/flipper fuse cutouts.
This catalog section contains the details on ratings, dimensions, and
ordering information for several arrester/flipper fuse combinations
and flipper fuse kits. For ratings and options not shown,
please contact your local Eaton's Cooper Power Systems sales
representative. For more detailed information on the surge arresters
used in these packages, refer to the appropriate Eaton's Cooper
Power Systems catalog section.
Catalog numbers and dimensional data related to these drawings
are listed in Tables 2, 3 and 4.
Table 3. UltraSIL Housed Arrester/Flipper Fuse Combinations
–– Dimensional Information
Table 4. Porcelain Housed Arrester/Flipper Fuse Combinations
–– Dimensional Information
Dimensions *
Dimensions *
Catalog Number
A
(in.)
B
(in.)
C
(in.)
Catalog Number
A
(in.)
B
(in.)
C
(in.)
UNS0905-OK1C-1D1A
9.9
16.0
6.4
AFZS103M9R
14.8
4.8
15.7
UNS1005-OK1C-1D1A
9.9
16.0
6.4
AFZS103M10R
14.8
4.8
15.7
UNS1808-OK1C-1D1A
13.1
19.2
7.4
AFZS103M18R
21.0
6.1
20.7
UHS0905-OK1C-1D1A
9.9
16.0
6.4
AFZL103M9R
14.8
4.8
15.7
UHS1005-OK1C-1D1A
9.9
16.0
6.4
AFZL103M10R
14.8
4.8
15.7
UHS1808-OK1C-1D1A
13.1
19.2
7.4
AFZL103M18R
21.0
6.1
20.7
* All dimensions are referenced in Figure 4.
* All dimensions are referenced in Figure 5.
www.cooperpower.com TD235005EN-3
Technical Data TD235005EN
Arrester/flipper fuse combinations
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235005EN
TD235005EN-4
Eaton, Cooper Power Systems, UltraSIL, and
VariSTAR are valuable trademarks of Eaton
in the U.S. and other countries. You are
not permitted to use the these trademarks
without the prior written consent of Eaton.
IEEE Std C62.11 standard is a trademark
of the Institute of Electrical and Electronics
Engineers, Inc., (IEEE). This publication is not
endorsed or approved by the IEEE.
For Eaton's Cooper Power
Systems arrester/flipper
fuse combinations product
information call 1-877-277-4636
or visit: www.cooperpower.
com.
Technical Data TD235006EN
Effective September 2014
Supersedes 235-35 July 2014
UltraSIL™ polymer-housed VariSTAR™
IEEE®surge arresters; normal-duty (5 kA), heavyduty, and riser pole (10 kA) for MV systems to 36 kV
General
Eaton's Cooper Power Systems has set the
standard for design, manufacturing and delivery
of polymeric distribution-class arresters with
UltraSIL™ polymer-housed arrester family. UltraSIL
polymer-housed surge arrester incorporates the
industry recognized superior polymer housing
material – silicone rubber.
Available in Normal Duty, Heavy-Duty and Riser
Pole classifications, UltraSIL polymer-housed
VariSTAR™ distribution-class surge arresters
provide superior overvoltage protection for any
electric distribution system.
Construction
The patented construction of UltraSIL polymerhoused arresters begins with Metal Oxide
Varistors (MOVs) manufactured at our Olean,
NY facility. Manufacturing our own MOVs allows
for strict quality control over all aspects of disk
production. Every MOV must pass a series of
physical and electrical tests designed to ensure
that only disks meeting strict quality standards are
used in UltraSIL arresters. Eaton's Cooper Power
Systems MOV disk design has proven its reliability
and protective ability through many years of field
service.
The MOV disks are combined with aluminum end
electrodes and are encapsulated in a high-strength
composite wrap insulating material on our fully
automated assembly line using strict quality
control processes that eliminate manufacturing
variances. The composite collar is cured to the
MOV disk stack to form a solid insulation MOV
disk module system that is inserted and bonded
to the industry leading track resistant UltraSIL
silicone rubber housing.
This exclusive Eaton's Cooper Power Systems
patented manufacturing process forms a
secondary moisture seal under the primary
silicone rubber housing seal, which makes the
arrester impervious to moisture and capable of
withstanding extreme electrical, environmental
and cantilever load conditions. The composite
wrapped UltraSIL polymer-housed arrester design
represents a quantum leap in polymer arrester
technology.
Following assembly, each arrester is subjected to
a battery of electrical tests to assure the highest
quality and in-service field performance.
TD235006EN-1
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
LINE TERMINAL
3/8 INCH STAINLESS STUD
arrester. The flexible design of the line terminal wildlife guard allows
insertion of the lead wire through the bottom of the integral molded
flanges. The access holes molded above the flanges will allow
conductor sizes ranging from 0 to 0.50” in diameter (OD). The line
terminal wildlife guard geometry allows water to shed away from
the surface area of the animal guard while minimizing ice build up
and maintaining flexibility through extreme operating temperatures.
(Refer to page 11, Figure 9 for a dimensional diagram.)
NAMEPLATE
INFORMATION
STAINLESS STEEL
TOP CAP
ALUMINUM
LINE ELECTRODE
For complete wildlife resistance, the ground terminal wildlife guard
can easily be installed alongside the line terminal wildlife guard or
universal wildlife protector. The ground terminal wildlife guard is
a compact and economical guard that ensures wildlife is unable
to come in contact with energized objects while on a grounded
surface.(Refer to page 11, Figure 10 for a dimensional diagram.)
UltraSIL SILICONE
RUBBER HOUSING
METAL OXIDE
VARISTAR (MOV)
DISKS
Operation
BONDED SOLID
INTERFACE
FIBERGLASS REINFORCED
EPOXY COMPOSITE
ALUMINUM
GROUND
ELECTRODE
OPTIONAL
INSULATED HANGER
OPTIONAL
ISOLATOR GROUND
LEAD DISCONNECTOR
kV RATING LABEL
(Visible from ground)
GROUND TERMINAL
3/8 INCH STAINLESS STUD
Figure 1. Cutaway illustration of VariSTAR distribution-class
arrester.
Features
UltraSIL silicone rubber polymer-housing has undergone a wide
range of design tests to determine the optimum shed configuration.
In addition, long term environmental testing has verified the lifetime
superiority of silicone rubber when compared to other polymeric
insulating materials.
The operation of VariSTAR arresters is typical of gapless metal oxide
arresters. During steady state conditions, line-to-ground voltage is
applied continuously across the arrester terminals. When surges
occur, VariSTAR arresters immediately limits the overvoltage to the
required protective level by conducting the surge current to ground.
Upon passage of the surge, the arrester returns to its initial state,
conducting minimal leakage current.
The protective characteristics of VariSTAR arresters provide excellent
overvoltage protection for distribution system equipment. (See page
6 for protective characteristics.)
Design testing
The housing material, internals and hardware work together as a
system and must stand up to years of exposure to environmental
extremes.
To assure a superior level of performance, both the components and
the assembled arrester units have been subjected to a program of
testing that accurately simulates years of exposure to actual field
conditions. Testing includes:
•
IEEE Std C62.11-2005™ standard Testing – Full certification to
the performance requirements by an independent laboratory. A
certified test report is available under Bulletin Number 95062.
Additional reference documents are listed on page 14.
Independent laboratory tests have verified the superiority of
silicone rubber in terms of non-wetting surfaces, resistance to UV
degradation and surface tracking, performance in contaminated
environments, chemical inertness, temperature stability and other
important insulating properties. UltraSIL silicone rubber polymerhousing will not support biological growth (algae and mildew), is
non-flammable and will not support combustion.
Production tests
An optional insulated mounting base is available to allow connecting
to a wide variety of brackets. The insulated base, made of glass filled
polyester, has been designed to provide needed mechanical strength
for installation and severe loading conditions.
•
100% Physical Inspection
•
100% Discharge Voltage test
•
100% V1mA/cm2
•
100% Leakage Current at 80% of V1mA/cm2 Voltage (Watts Loss)
•
Batch High-current, Short-duration test
•
Batch Thermal Stability test
•
Batch Aging test
A ground lead isolator is also available. The isolator removes the
ground terminal from the arrester in the unlikely event of arrester
failure, thus preventing a permanent system fault. An isolator that
has operated gives visual indication of internal damage to the
arrester and the need for arrester replacement. See Figure 2 for the
isolator operating characteristics.
The optional universal wildlife protector has two self-adjusting "valve"
style openings which vary from 0 to 0.75" in diameter, thus allowing
for a large variety of conductor/insulation sizes while providing
optimum wildlife protection. (See page 11, Figure 8 for a dimensional
diagram.)
Customers looking to improve system reliability by minimizing
wildlife related outages now have multiple options. In addition to
the universal wildlife protector featuring two self-adjusting "valve"
style openings, Eaton's Cooper Power Systems also offers the more
robust line terminal wildlife guard. The line terminal wildlife guard
is easily retrofitted to existing arresters installations and provides
increased electrical insulation for the high-voltage terminal of the
TD235006EN-2 www.cooperpower.com
A complete production test program ensures a quality product. Each
metal oxide varistor receives a series of electrical tests. Quality is
demonstrated by a series of destructive tests performed on every
batch of varistors. Listed are the tests performed on the varistors:
Each fully assembled VariSTAR arrester must pass the following
production tests:
•
100% Physical Inspection
•
100% Leakage Current test
•
100% Partial Discharge Inception Voltage test
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
General application recommendations
Table 1. Commonly Applied Voltage Ratings of VariSTAR Arresters
The rating of an arrester is the maximum power frequency lineto-ground voltage at which the arrester is designed to pass an
operating duty-cycle test. Table 1 provides a general application guide
for the selection of the proper arrester rating for a given system
voltage and system grounding configuration as outlined in the IEEE
Std C62.22™ standard application guide.
System Voltage
(kV rms)
Recommended Arrester Rating per IEEE Std
C62.22™ standard (kV rms)
Nominal
Maximum
Four-Wire
Wye MultiGrounded
Neutral
Three-Wire
Wye Solidly
Grounded
Neutral
Delta and
Ungrounded
Wye
2.4
2.54
—
—
3
Under fault conditions and other system anomalies, higher voltages
can be experienced by the arrester. To ensure that the arrester
ratings will not be exceeded, Eaton's Cooper Power Systems
application engineers are available to make recommendations. The
following information is normally required:
4.16Y/2.4
4.4Y/2.54
3
6
6
4.16
4.4
—
—
6
4.8
5.08
—
—
6
6.9
7.26
—
—
9
1. System maximum operating voltage.
8.32Y/4.8
8.8Y/5.08
6
9
—
2. System grounding conditions.
12.0Y/6.93
12.7Y/7.33
9
12
—
A. For four-wire circuits, grounding conditions depend upon
whether the system is multi-grounded, whether it has
a neutral impedance and whether common primary and
secondary neutrals are used.
12.47Y/7.2
13.2Y/7.62
9
15
—
13.2Y/7.62
13.97Y/8.07
10
15
—
13.8Y/7.97
14.52Y/8.38
10
15
––
B. For three-wire circuits, grounding conditions depend upon
whether the system is solidly grounded at the source,
grounded through neutral impedance at the source
transformers or ungrounded.
13.8
14.52
—
—
18
20.78Y/12.0
22Y/12.7
15
21
—
22.86Y/13.2
24.2Y/13.87
18
24
—
Consult your Eaton's Cooper Power Systems representative to have
your individual system application needs reviewed.
23
24.34
—
—
30
24.94Y/14.4
26.4Y/15.24
18
27
—
Performance test characteristics
27.6Y/15.93
29.3Y/16.89
21
30
—
34.5Y/19.92
36.5Y/21.08
27
36
—
46Y/26.6
48.3Y/28
36
—
—
•
Duty Cycle:
Normal-Duty: 22 current surges of 5 kA crest, 8/20 µs waveshape.
Heavy-Duty and Riser Pole: 20 current surges of 10 kA crest, 8/20
µs waveshape followed by 2 current surges of 40 kA crest, 8/20
µs waveshape.
•
High-current, Short-duration Discharge:
Normal-Duty: 2 current surges of 65 kA crest, 4/10 µs waveshape.
Heavy-Duty and Riser Pole: 2 current surges of 100 kA crest, 4/10
µs waveshape.
•
Low-Current, Long-Duration Discharge:
Normal-Duty: 20 current surges of 75 A crest 2000 µs duration
rectangular wave.
Heavy-Duty and Riser Pole: 20 current surges of 250 A crest 2000
µs duration rectangular wave.
Following each of these tests, the arresters remain thermally stable
as verified by:
•
Continually decreasing power values during a thirty minute power
monitoring period.
•
No evidence of physical or electrical deterioration.
•
The 5 kA (normal-duty) or 10 kA (heavy-duty and riser pole) discharge
voltages measured after each test changed less then 10% from the
initial values.
In addition, full IEEE Std C62.11-2005™ standard certification has
been completed and verified.
Fault current withstand tests
Fault current withstand tests demonstrate the ability to withstand
fault currents for specific durations without expelling any internal
components. All VariSTAR arrester designs have been tested in
accordance with the requirements listed in IEEE Std C62.11-2005™
standard, and are non-fragmenting to the levels shown in Table 2.
Table 2. Fault Current Withstand Tests
Fault Current Amplitude
(kA rms)
Fault Current Duration
(cycles)
0.6
60
20
12
10.0
IGNITION TIME (SECONDS)
VariSTAR distribution-class arresters withstand the following design
tests as described by IEEE Std C62.11-2005™ standard:
1.0
0.1
0.01
10
100
1000
10000
ARRESTER FAULT CURRENT (A rms)
Figure 2. Isolator operating characteristic.
www.cooperpower.com TD235006EN-3
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
Table 3. Insulation Withstand Characteristics of Optional Insulated Mounting Bracket
Bracket Mounting
Length Center-to-Center
(in)
Insulated Mounting
Bracket
Leakage Distance
(in)
Power Frequency
Voltage Withstand
(60 sec, Wet, kV)
Strike
(in)
1.2/50 μs Impulse
(kV Crest)
Standard For Rating 3-10 kV
4.1
5.9
2.8
36
70
Standard For Rating 12-36 kV
5
8.9
3.9
48
80
Dimensions and clearances
LINE TERMINAL
Outline drawings for several common design options are shown in
Figures 3-6. Dimensions for these designs are listed in Table 3.
A
DIAMETER:
HEAVY DUTY = 3.5"
NORMAL DUTY = 3.4”
RISER POLE = 3.6”
A
1.75"
MOUNTING
HOLE FOR
1/2" HARDWARE
B
D
0.56"
GROUND STRAP
1.75"
B
RESTRAINING
DEVICE (REMOVE
DURING
INSTALLATION)
Figure 3. VariSTAR arrester with isolator and insulated hanger.
0"-4"
Figure 5. VariSTAR arrester with isolator, insulated hanger and
transformer mounting bracket.
4.12"-5.15"
C
2.56"
A
MOUNTING
HOLE FOR
1/2" HARDWARE
1.7"
1.75"
0.56"
B
Figure 4. VariSTAR arrester with isolator, insulated hanger and
NEMA® cross-arm bracket.
TD235006EN-4 www.cooperpower.com
B
Figure 6. VariSTAR arrester with insulated hanger without
isolator.
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
Table 4. Dimensional Data – VariSTAR Arresters
Arrester
Rating
(kV rms)
Standard
Housing
Code
(Digits 6 & 7
Table 10)
3
6
Dimensions
Figures 3-6, page 4
(Inches)
Minimum Recommended Clearances* (in.)
Heavy-Duty
Normal-Duty
A+
B
C+
D
Phase-toGround
Phase-toPhase
Phase-toGround
Phase-toPhase
3
6.9
4.1
5.5
8.7
3
4.25
2.75
3.75
4
7.9
4.1
6.5
8.7
4
5.5
3.75
5
9
5
9.0
4.1
7.6
8.7
5.25
7
5
6.5
10
5
9.0
4.1
7.6
8.7
5.25
7
5
6.5
12
6
10.0
5
8.6
8.7
6
7.75
5.75
7.25
15
7
11.1
5
9.7
8.7
6.75
8.75
6.5
8.25
18
8
12.2
5
10.8
8.7
9.25
11.25
9
10.75
21
9
13.2
5
11.8
8.7
9.25
11.25
9
10.75
24
10
14.3
5
12.9
8.7
10.75
13.25
10.5
12.75
27
11
15.3
5
13.9
14.3
10.75
13.25
10.5
12.75
30
12
16.4
5
15
14.3
10.75
13.25
10.5
12.75
33
13
17.5
5
16.1
14.3
12.75
16.25
12.5
15.75
36
14
18.5
5
17.1
14.3
12.75
16.25
12.5
15.75
* All clearances are measured from center line of arrester per IEEE Std C62.22™ standard.
+ With optional Wildlife Protector add 0.2 inches.
Insulation characteristics
The insulation characteristics of VariSTAR arrester family are shown
in Table 5.
Table 5. Housing Insulation Withstand Voltages of VariSTAR Arresters
Arrester
Mounting
Configuration
4.1"
Strike
(in.)
1.2/50
µs
Impulse
(kV
crest)
1 Min.
Dry
(kV rms)
7.2
3.1
78
10.1
4.2
91
5
13
5.2
6
15.9
6.3
7
18.8
8
21.7
9
10
5.0"
10 sec.
Wet
(kV rms)
1.2/50
µs
Impulse
(kV
crest)
1 Min.
Dry
(kV rms)
47
24
92
56
36
105
104
64
45
117
78
57
7.3
129
87
8.4
140
96
24.6
9.4
152
27.5
10.5
164
11
30.4
11.5
12
33.3
12.6
13
36.2
14
39.1
15
4.1"
10 sec.
Wet
(kV rms)
1.2/50
µs
Impulse
(kV
crest)
1 Min.
Dry
(kV rms)
50
37
70
55
39
79
117
63
52
126
86
59
68
137
96
79
148
106
105
89
159
114
100
171
176
123
110
189
131
120
13.6
201
139
14.7
215
148
42
15.8
228
16
44.9
16.8
17
47.8
17.8
Arrester
Housing
Code
Digits
(6 & 7)
Creep
Distance
(in.)
3
4
5.0"
10 sec.
Wet
(kV rms)
1.2/50
µs
Impulse
(kV
crest)
10 sec.
Wet
(kV rms)
1.2/50
µs
Impulse
(kV
crest)
1 Min.
Dry
(kV rms)
1 Min.
Dry
(kV rms)
10 sec.
Wet
(kV rms)
44
24
85
52
34
99
53
30
70
42
24
56
39
82
51
33
89
55
44
93
61
58
109
60
52
90
62
46
119
80
59
97
72
56
71
98
62
83
104
65
59
122
81
63
107
81
69
61
126
82
67
118
89
81
116
94
110
126
105
117
68
63
130
83
72
129
98
93
72
67
136
86
78
140
106
105
183
135
116
195
144
127
125
77
71
142
90
83
152
114
116
133
82
75
149
94
89
164
122
126
130
207
153
140
220
161
137
142
88
81
158
99
96
177
130
136
147
152
94
87
167
105
102
190
138
155
150
233
145
170
157
162
101
93
177
112
109
204
146
153
242
183
158
255
171
169
246
178
167
173
109
101
187
120
117
218
154
162
259
185
176
185
117
109
199
128
125
233
161
169
www.cooperpower.com TD235006EN-5
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
Protective characteristics
VariSTAR distribution-class arresters provide excellent overvoltage
protection for electrical equipment throughout distribution systems.
The protective characteristics of the VariSTAR arrester family are
shown in Tables 6, 7, and 8.
Table 6. Protective Characteristics – VariSTAR Normal-Duty (UNS) Arrester
Arrester
Rating
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
Maximum Discharge Voltage (kV crest)
8/20 µs Current Wave
MCOV
(kV rms)
Equivalent
Front-of-wave
Protective
Level*
(kV crest)
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27
29
11
22
31.7
33
41.5
51.8
62.2
66
77
87.2
97.1
108
116
9
18.0
26.0
27.0
33.9
42.4
50.9
54.0
63.0
71.4
79.5
87.8
95.3
9.7
19.4
28
29.1
36.6
45.7
54.9
58.2
67.9
76.9
85.7
95.1
103
10.4
20.8
30
31.2
39.2
49
58.8
62.4
72.8
82.4
91.8
102
110
11.4
22.7
32.8
34.1
42.9
53.6
64.3
68.2
79.6
90.1
100
112
120
13
26
37.4
38.9
48.9
61.1
73.4
77.9
90.8
103
115
127
137
15.1
30.2
43.5
45.3
56.9
71.1
85.3
90.6
106
120
133
148
160
* Based on 5 kA current impulse that results in a discharge voltage cresting in 0.5 µs.
Table 7. Protective Characteristics – VariSTAR Heavy-Duty (UHS) Arrester
Arrester
Rating
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
Maximum Discharge Voltage (kV crest)
8/20 µs Current Wave
MCOV
(kV rms)
Equivalent
Front-of-wave
Protective
Level*
(kV crest)
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27
29
11
21.9
33
35
43.9
53.1
66
70
80.9
94
102
116
123
8.2
16.3
24.6
26
32.7
39.6
49.1
52.1
60.2
70
76.1
86.5
91.5
8.7
17.4
26.1
27.7
34.8
42.1
52.3
55.4
64.1
74.5
81
92.1
97.3
9.1
18.2
27.3
29
36.4
44
54.7
58
67
77.9
84.7
96.3
102
9.9
19.8
29.8
31.6
39.7
48
59.6
63.2
73.1
84.9
92.4
105
111
10.9
21.9
33
34.9
43.9
53.1
65.9
69.9
80.8
93.9
102
116
123
12.3
24.7
37.1
39.4
49.5
59.8
74.2
78.7
91.1
106
115
131
138
* Based on 10 kA current impulse that results in a discharge voltage cresting in 0.5 µs.
Table 8. Protective Characteristics – VariSTAR Riser Pole (URS) Arrester
Arrester
Rating
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
Maximum Discharge Voltage (kV crest)
8/20 µs Current Wave
MCOV
(kV rms)
Equivalent
Front-of-wave
Protective
Level*
(kV crest)
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27
29
10.3
20.7
29.8
31
39.1
48.7
58.4
62
72.3
81.4
91
100
108
7.7
15.5
22.3
23.2
29.2
36.4
43.7
46.4
54.1
60.9
68.1
75
80.6
8.2
16.4
23.7
24.6
31.1
38.7
46.4
49.3
57.5
64.7
72.4
79.7
85.6
8.6
17.2
24.7
25.7
32.4
40.4
48.5
51.5
60
67.6
75.6
83.3
89.4
9.4
18.7
27
28.1
35.4
44.1
52.9
56.2
65.5
73.8
82.5
90.9
97.6
10.3
20.7
29.8
31
39.1
48.8
58.5
62.1
72.4
81.6
91.2
100
108
11.7
23.3
33.6
35
44.1
54.9
65.9
70
81.6
91.9
103
113
122
* Based on 10 kA current impulse that results in a discharge voltage cresting in 0.5 µs.
TD235006EN-6 www.cooperpower.com
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
Temporary overvoltage (TOV) capability
Voltage per unit MCOV
1.800
1.700
1.600
The ability to withstand 60 Hz overvoltage conditions [Temporary
Overvoltage (TOV)] is shown in Figure 7 for all VariSTAR distributionclass arresters. The graph shows for a given voltage magnitude (on
a Per Unit of MCOV basis), the time an arrester can survive a TOV
condition without going into thermal runaway.
1.75
1.65
1.67
1.69
1.56
1.60
1.500
NORMAL DUTY (UNS) AND
HEAVY DUTY (UHS)
1.47
1.51
1.400
Ordering information
1.39
1.43
1.300
1.31
1.24
1.35
RISER POLE (URS)
1.27
1.200
1.20
1.100
0.01
0.1
1
10
100
1000
10000
Time Duration in Seconds
Figure 7. Temporary overvoltage curve. No prior duty – 60° C
ambient.
VariSTAR distribution-class arresters from Eaton's Cooper Power
Systems are supplied in a variety of customer defined options. The
catalog system employed lets the number define the features of the
arrester. Table 9 shows the catalog numbers for several of the most
common arrester styles. Table 10 shows what each alpha-numeric
character in the catalog number represents and lists several of the
available options defined by these characters. A wide variety of
option combinations are available, allowing users to customize the
arrester to their specific needs. For further options contact your
Eaton's Cooper Power Systems sales engineer.
Table 9. Catalog Numbers – VariSTAR Distribution-Class Surge Arresters
Arrester
Rating
With Isolator and Insulated
Hanger (Figure 3)
With Isolator, Insulated Hanger
and NEMA Cross-Arm Bracket
(Figure 4)
With Insulated Hanger Without
Isolator (Figure 6)
With Isolator, Insulated Hanger
and Transformer Mounting
Bracket (Figure 5)
3
U*S03030A1A1A1A
U*S03030A1A1B1A
U*S03030A0A1A1A
U*S03030A1C1C1C
6
U*S06040A1A1A1A
U*S06040A1A1B1A
U*S06040A0A1A1A
U*S06040A1C1C1C
9
U*S09050A1A1A1A
U*S09050A1A1B1A
U*S09050A0A1A1A
U*S09050A1C1C1C
10
U*S10050A1A1A1A
U*S10050A1A1B1A
U*S10050A0A1A1A
U*S10050A1C1C1C
12
U*S12060A1A1A1A
U*S12060A1A1B1A
U*S12060A0A1A1A
U*S12060A1C1C1C
15
U*S15070A1A1A1A
U*S15070A1A1B1A
U*S15070A0A1A1A
U*S15070A1C1C1C
18
U*S18080A1A1A1A
U*S18080A1A1B1A
U*S18080A0A1A1A
U*S18080A1C1C1C
21
U*S21090A1A1A1A
U*S21090A1A1B1A
U*S21090A0A1A1A
U*S21090A1C1C1C
24
U*S24100A1A1A1A
U*S24100A1A1B1A
U*S24100A0A1A1A
U*S24100A1C1C1C
27
U*S27110A1A1A1A
U*S27110A1A1B1A
U*S27110A0A1A1A
U*S27110A1C1C1A
30
U*S30120A1A1A1A
U*S30120A1A1B1A
U*S30120A0A1A1A
U*S30120A1C1C1A
33
U*S33130A1A1A1A
U*S33130A1A1B1A
U*S33130A0A1A1A
U*S33130A1C1C1A
36
U*S36140A1A1A1A
U*S36140A1A1B1A
U*S36140A0A1A1A
U*S36140A1C1C1A
* Digit 2 Option: N = Normal-Duty, H = Heavy-Duty, R = Riser Pole.
NNote: All catalog numbers listed above include a universal wildlife protector.
www.cooperpower.com TD235006EN-7
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
Table 10. VariSTAR Distribution-Class Arrester UltraQUIK™ Catalog Numbering System
1
U
2
3
4
S
5
6
7
8
9
10
11
12
13
14
15
Catalog Number Digits
1 = UltraSIL Polymer-Housed Arrester, U
2 = Arrester Class:
N = Normal-Duty
3 = Arrester Type:
S = VariSTAR
4 & 5 = Arrester Rating (MCOV):
03 = 3 kV (2.55 kV)
06 = 6 kV (5.1 kV)
09 = 9 kV (7.65 kV)
10 = 10 kV (8.4 kV)
H = Heavy-Duty
R = Riser Pole
12 = 12 kV (10.2 kV)
15 = 15 kV (12.7 kV)
18 = 18 kV (15.3 kV)
21 = 21 kV (17.0 kV)
24 = 24 kV (19.5 kV)
27 = 27 kV (22.0 kV)
30 = 30 kV (24.4 kV)
33 = 33 kV (27.0 kV)
36 = 36 kV (29.0 kV)
6 & 7 = Housing Code per Arrester Rating (Select from Table below):
« = Standard Creepage Housing O = Optional Creepage Housings
Digits 6 & 7
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
Creep
Length
7.2”
10.1”
13.0”
15.9”
18.8”
21.7”
24.6”
27.5”
30.4”
33.3”
36.2”
39.1”
42.0”
44.9”
47.8”
«
O
«
O
«
«
O
O
O
«
O
O
O
«
O
O
O
O
«
O
O
O
«
O
O
O
O
«
O
O
O
O
«
O
O
O
O
O
O
O
O
O
Arrester
Rating
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
O
O
O
O
«
O
O
O
O
«
O
O
O
O
«
8 = Line Terminal Wire: 0 = No Line Terminal Wire
1 = 12", #6 AWG Insulated Wire,
Stripped 1.25" both ends
4 = 18", #6 AWG Insulated Wire,
Stripped 1.25" both ends
7 = 30", #6 AWG Insulated Wire,
Stripped 1.25" both ends
2 = 12", #6 AWG Insulated Wire,
1 ring terminal /1 end stripped 1.25"
5 = 18", #6 AWG Insulated Wire,
1 ring terminal /1 end stripped 1.25"
8 = 30", #6 AWG Insulated Wire,
1 ring terminal /1 end stripped 1.25"
3 = 12", #6 AWG Insulated Wire,
2 ring terminals
6 = 18", #6 AWG Insulated Wire,
2 ring terminals
9 = 30", #6 AWG Insulated Wire,
2 ring terminals
9 = Line Terminal Options
A = Silicon Bronze Nut,
Stainless Steel Wire
Clamp and Universal
Wildlife Protector
B = Silicon Bronze Nut
and Stainless Steel Wire
Clamp
TD235006EN-8 www.cooperpower.com
C = No Hardware
D = Silicon Bronze Nut,
Lock Washer, Flat Washer
and Universal Wildlife
Protector (For leads with
ring terminals)
X = Silicon Bronze Nut,
Stainless Steel Wire
Clamp and Line Terminal
Wildlife Guard.
Reference Figure 8 for
dimensional information.
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
Table 10. VariSTAR Distribution-Class Arrester UltraQUIK™ Catalog Numbering System (continued)
1
U
2
3
S
4
5
6
7
8
9
10
11
12
13
14
15
10 = Isolator, with 3/8" stainless steel grounding stud
0 = No Isolator
2 = Red Isolator
4 = Blue Isolator
1 = Black Isolator (Standard)
3 = Yellow Isolator
5 = White Isolator
6 = Orange Isolator
B = No Hardware (Shown with optional
Isolator and Insulated Hanger)
C = Copper Transformer Grounding
Strap with Stainless Steel Lock Washer
& Silicone Bronze Nut (Shown with
optional Isolator and Insulated Hanger)
11 = Ground Terminal Options
A = Wire Clamp with Silicon Bronze Nut
(Shown with optional Isolator and
Insulated Hanger)
D = Stainless Steel Washer, Lock
Washer, Silicone Bronze Nut
12 = Base Configuration Options
0 = Insulated Base
(Base Mounted Arrester)
1 = Insulated Hanger (Required with optional isolator)
(Available only if Digits 6 & 7 are Housing Options
15 or less*)
* For more information, contact your Eaton's Cooper
Power Systems representative.
2 = Insulated Base With Conductive Mounting Strap
(Requires “D” in Digit 11)
13 = Mounting Bracket Options
A = Without an Additional Mounting
Bracket
B = NEMA Cross-Arm Bracket
(Arrester Mounting Hardware Included)
(Requires “1” or “2” in Digit 12)
Refer to Figure 11 for dimensional
information
C = Transformer Bracket
(Arrester Mounting Hardware Included)
(Requires “1” or “2” in Digit 12)
(Reference Figures 12 & 13 for bracket
dimensions by rating)
D = Option C Plus Transformer
Mounting Hardware
(2 each — 1/2", 13-UNC x 3/4" Bolts, Flat
Washers, and Lock Washers)
(Requires “1” or “2” in Digit 12)
(Reference Figures 12 & 13 for bracket
dimensions by rating)
www.cooperpower.com TD235006EN-9
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
Table 10. VariSTAR Distribution-Class Arrester UltraQUIK™ Catalog Numbering System (continued)
1
U
2
3
S
4
5
6
7
8
9
10
11
12
13
14
1
15
12 & 13 = Double Digit Mounting Options with Ground Terminal Wildlife Guard
E8 = Ground Terminal Wildlife Guard, Insulated Hanger
(Shown with optional isolator), NEMA® cross-arm bracket
(Arrester Mounting Hardware Included)
Refer to Figures 10 and 11 for dimensional information
E9 = Ground Terminal Wildlife Guard, Insulated Hanger
(Shown with optional isolator), transformer bracket. Reference Figures 11 - 13 for
dimensions including brackets by rating.
14 = Nameplate Information: 1 = IEEE Std C62.11-2005™ standard Required Data
15 = Packaging: A = Individual Carton (Assembled Terminal Hardware). Each arrester is shipped in an individual high strength cardboard carton. The
top and bottom terminal hardware is assembled to the arrester. Any optional brackets or hardware are provided unassembled.
C = Bulk Packed (Assembled Terminal Hardware). Pallet sized bulk cardboard packaging for transformer mounting bracket options
(Digits 13 = C or D only). Each arrester is shipped fully assembled including transformer mounting bracket. Available for 3-24 kV
arresters only. Full pallet quantities only: 3-10 kV = 90, 12-18 kV = 72, 21-24 kV = 40.
3 = International, Individual Carton (Assembled Terminal Hardware). Each arrester with accessories is shipped in an individual
cardboard carton. The top and bottom terminal hardware is assembled to the arrester. Individual cartons are packed within a
heavy duty quadwall carton having a skid bottom and suitable for double stacking within an ocean shipping container.
TD235006EN-10 www.cooperpower.com
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
Available accessories for the VariSTAR arrester
VALVE
OPENING
0.80"
VALVE
OPENING
2.22"
152
1.03"
2.50"
VALVE
OPENING
SIDE VIEW
TOP VIEW
Figure 8. Universal wildlife protector (catalog number AV346X1C).
(All dimensions in inches).
The universal wildlife protector has two self-adjusting "valve" style openings which vary from 0 to 0.75" in
diameter, thus allowing for a large variety of conductor/insulation sizes while providing optimum wildlife
protection.
Figure 9. Line terminal wildlife guard (catalog number AV698X1C). (All dimensions in inches.)
Figure 10. Ground terminal wildlife guard (catalog number AV731X1C). (All dimensions in inches.) Left
shows attachment of ground terminal wildlife guard, right images shows ground terminal wildlife guard
completely installed.
www.cooperpower.com TD235006EN-11
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
3.00”
1.25
1.50”
.75”
ZERO
To
4.00
.344
45°
6.75
.438
SQUARE
4.12
To
5.15
4.50
.56”
1/2" HARDWARE
2.13”
2.56
.438 SQUARE
HOLE
.500
3.40”
1.50
3/8" HARDWARE
2.13”
Figure 11. NEMA® cross-arm bracket (catalog number AM35A1).
Can be specified with a "B" in digit 13. (All dimensions in
inches.)
14.25”
12.55”
2.50”
2.13”
3.38”
.75"
1.25"
2.38"
.25"
2.13”
1"
1.86”
50
Figure 13. Standard transformer mounting bracket for 27-36 kV
arrester (part number AH46A2). Can be specified with a “C” in
Digit 13. (All dimensions in inches.)
2.38"
8.70"
1"
5.70"
2.25"
2.5"
2.25"
1.63"
40
Figure 12. Standard transformer mounting bracket for
3-24 kV arrester (part number AM36A2). Can be specified with a
“C” in Digit 13. (All dimensions in inches.)
.56 x 2.25"
MTG. SLOTS
(2 REQ'D)
12.25"
7"
2.5"
1.63"
0.5"
1.25"
Figure 14. Optional transformer mounting bracket (catalog
number AM36A3). Can be specified with an “N” in Digit 13.
(All dimensions in inches.)
TD235006EN-12 www.cooperpower.com
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
2.38"
170
13
1"
114
9
32
11 SQUARE
HOLE
40
11 SQUARE
.56 x 2.25"
MTG. SLOTS
(2 REQ'D)
11"
8
13
7"
2.5"
1.63"
0.5"
1.5"
Figure 16. Conductive base mounting for use with 3/8"
hardware. Can be specified with a "2" in digit 12. (Requires "0"
in digit 10, "D" in digit 11). (All dimensions in inches.)
170
13
114
Figure 15. Optional transformer mounting bracket (catalog
number AM36A1). Can be specified with an “S” in Digit 13. (All
dimensions in inches.)
32
(2) 13 mm O
8
13
www.cooperpower.com TD235006EN-13
Technical Data TD235006EN
Effective September 2014
Additional information
•
S235-35-1, ANSI® IEEE® UltraSIL Housed Distribution-Class MOV
Arrester Installation Instructions
•
S235-35-2, ANSI® IEEE® UltraSIL Housed Distribution-Class MOV
BPL Coupler Installation
•
S235-35-3, ANSI® IEEE® UltraSIL Housed Distribution-Class MOV
BPL Coupler Installation Instructions
•
95062, ANSI® IEEE ® UltraSIL Polymer-Housed VariSTAR NormalDuty, Heavy-Duty and Riser Pole Distribution-Class Arrester
Certified Test Report
•
B235-08022, Superior Protection for Arresters and Wildlife
TD235006EN-14 www.cooperpower.com
UltraSIL polymer-housed VariSTAR surge arresters
UltraSIL polymer-housed VariSTAR surge arresters
Technical Data TD235006EN
Effective September 2014
www.cooperpower.com TD235006EN-15
Technical Data TD235006EN
UltraSIL polymer-housed VariSTAR surge arresters
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235006EN
TD235006EN-16
Eaton, Cooper Power Systems, VariSTAR,
UltraSIL, and UltraQUIK are valuable
trademarks of Eaton in the U.S. and other
countries. You are not permitted to use the
these trademarks without the prior written
consent of Eaton.
IEEE Std C62.11™-2005 and Std C62.22™
standards are trademarks of the Institute of
Electrical and Electronics Engineers, Inc.,
(IEEE). This publication is not endorsed or
approved by the IEEE.
IEEE® is a registered trademark of the
Institute of Electrical and Electronics
Engineers, Inc.
ANSI® is a registered trademark of the
American National Standards Institute.
NEMA® is a registered trademark of the
National Electrical Manufacturers Association.
For Eaton’s Cooper Power
Systems surge arrester
product information call
1-877-277-4636 or visit: www.
cooperpower.com.
Technical Data TD235007EN
Effective September 2014
Supersedes 235-60 March 1996
VariSTAR™ Type AZL heavy-duty
distribution-class MOV arrester
General
Eaton's Cooper Power Systems VariSTAR™ Type
AZL heavy-duty distribution-class MOV arrester
in ratings of 3 through 36 kV, incorporates the
latest in metal oxide varistor (MOV) technology
in a porcelain design. With this combination of
technologies, Eaton's Cooper Power Systems
can offer reliable and cost effective overhead
protection of distribution systems.
Construction
The VariSTAR Type AZL arrester consists of highly
nonlinear metal oxide varistors enclosed in a
porcelain housing. The highly nonlinear nature of
the MOV disks results in conduction of leakage
current of milliamperes at nominal line-to-ground
operating voltage. This small amount of leakage
current (which is primarily capacitive current with
a small component of resistive current) can be
tolerated on a continuous basis.
The VariSTAR Type AZL design is available with
or without an isolator and can be supplied with
a variety of mounting brackets to satisfy a wide
range of applications.
Operation
The operation of the VariSTAR Type AZL is typical
of gapless metal oxide arresters. During steady
state conditions, nominal line-to-ground voltage
is applied continuously across the arrester‘s
terminals. When overvoltages occur, the VariSTAR
Type AZL arrester limits the overvoltage to
required protective levels by conducting the
surge current. Upon passage of the overvoltage
condition, the arrester returns to a highly nonlinear
steady state, conducting minimal leakage current.
The superior protective characteristics of the
VariSTAR Type AZL arrester provide excellent
protection for distribution transformers with
lower impulse withstand capabilities. Its superior
reliability makes it an ideal choice for areas with
high isokeraunic levels.
TD235007EN-1
Technical Data TD235007EN
VariSTAR Type AZL heavy-duty distribution-class MOV arrester
Effective September 2014
Production tests
Features and detailed description
A complete production test program
ensures a quality product. Each VariSTAR
metal oxide varistor receives a series of
electrical tests. Quality is further ensured by
a series of destructive tests performed on
every batch of varistors. Listed are the tests
that are performed on the varistors:
INSULATING TERMINAL CAP
Polymer cap provides
superior wildlife protection.
TOP ELECTRODE
Ensures low resistive
contact to MOV disk
column.
HIGH STRENGTH WET
PROCESS GLAZED
PORCELAIN
MOV DISKS
Highly nonlinear metal
oxide varistors provide
exceptional surge protection.
Withstands thermal
and mechanical
shocks; excellent
washing characteristics; provides high
creepage distance
above and below the
hanger bracket.
•
100% Physical Inspection
•
100% Discharge Voltage Test
•
100% V1mA/cm2
•
100% Leakage Current at 80% of
V1mA/cm2 Voltage
•
Batch High-current, Short-duration Test
•
Batch Thermal Stability Test
•
Batch Disk Aging Test
Each VariSTAR Type AZL arrester must pass
the following production tests:
•
100% Physical Inspection
•
100% Vacuum over Fluid Seal Test
•
100% Leakage Current Test
•
100% RIV Test
Standards
The VariSTAR Type AZL arrester complies
with the latest revision of IEEE Std
C62.11™-1987 standard “IEEE Standard for
Metal Oxide Surge Arresters for AC Power
Circuits”.
ALUMINUM SPACER
Provides additional
length for extended
creepage porcelain.
COPPER STRAP
Provides a low resistance
shunt for surge current
discharge.
ISOLATOR™ GROUND
LEAD DISCONNECTOR
Provides positive
isolation and visual
identification if arrester
becomes damaged
internally.
Figure 1. Cutaway illustration of VariSTAR AZL arrester.
General application
recommendations
HEAVY STEEL
COIL SPRING
The rating of an arrester is the power
frequency line-to-ground voltage at
which the arrester is designed to pass an
operating duty-cycle test. Table 1 provides a
general application guide for the selection of
the proper arrester rating for a given system
voltage and system grounding configuration.
Maintains high pressure on disks for
effective contact surfaces; protects from
mechanical shock.
Eaton's Cooper Power Systems
application engineers are available to make
recommendations. The following information
is normally required:
IDENTIFICATION
INFORMATION
Convenient reference
for arrester type,
MCOV, voltage rating
and year and quarter of
manufacture.
SOLDERLESS
CONNECTORS
Accommodates No.
10 solid through No.
2/0 stranded line and
ground leads.
1. System maximum operating voltage.
2. System grounding conditions.
A. For four-wire circuits, grounding
conditions depend upon whether
the system is multi-grounded,
whether it has a neutral impedance
and whether common primary and
secondary neutrals are used.
B. For three-wire circuits, grounding
conditions depend upon whether
the system is solidly grounded
at the source, grounded through
neutral impedance at the source
transformers or ungrounded.
Where unusual conditions exist (high
ground resistance, high capacitive load,
arc-welding equipment, etc.) the following
TD235007EN-2 www.cooperpower.com
Technical Data TD235007EN
VariSTAR Type AZL heavy-duty distribution-class MOV arrester
Effective September 2014
Table 1. Commonly Applied Voltage Ratings of the VariSTAR AZL Arrester
supplementary information is necessary:
System Voltage
(kV rms)
Recommended Arrester Rating
(kV rms)
1. The unusual condition.
Nominal
Maximum
Four-Wire Wye
Multi-Grounded
Neutral
Three-Wire Wye
Solidly Grounded
Neutral
Delta and
Ungrounded
Wye
2.4
2.54
–
–
3
4.16Y/2.4
4.4Y/2.54
3
6
6
4.16
4.4
–
–
6
4.8
5.08
–
–
6
6.9
7.26
–
–
9
8.32Y/4.8
8.8Y/5.08
6
9
–
12.0Y/6.93
12.7Y/7.33
9
12
–
12.47Y/7.2
13.2Y/7.62
9
15
–
13.2Y/7.62
13.97Y/8.07
10
15
–
13.8Y/7.97
14.52Y/8.38
10
15
–
13.8
14.52
–
–
18
20.78Y/12.0
22Y/12.7
15
21
–
22.86Y/13.2
24.2Y/13.87
18
24
–
23
24.34
–
–
30
24.94Y/14.4
26.4Y/15.24
18
27
–
27.6Y/15.93
29.3Y/16.89
21
30
–
34.5Y/19.92
36.5Y/21.08
27
36
–
46Y/26.6
48.3Y/28
36
–
–
2. Type of construction, phase spacing,
length of line, conductor size.
3. BIL of equipment and line insulation.
4. Phase-sequence components of
impedances on the load side of the
distribution substation.
The impedance of the transformer and
the impedance and grounding of supply
to the substation all affect the voltage
during faults.Temporary Overvoltage (TOV)
capability
The Temporary Overvoltage (TOV) capability
of the VariSTAR AZL arrester is shown in
Figure 3.
Performance test
characteristics
The VariSTAR AZL arrester consistently
withstands the following design tests
as described by IEEE Std C62.11™-1987
standard:
Duty cycle
20 current surges of 10 kA crest 8/20 µs
waveshape followed by 2 current surges of
40 kA crest 8/20 µs waveshape.
High-current, short-duration
discharge:
2 current surges of 100 kA crest 4/10 µs
waveshape.
1.7
1.6
Low-current, long-duration
discharge:
Per Unit MCOV
20 current surges of 250 A crest 2000 µs
rectangle wave duration.
1.5
Following each of these tests, the arresters
remain thermally stable as verified by:
1.4
Per Unit Arrester Rating
1.3
1.2
1.1
•
Continually decreasing power values
during a thirty minute power monitoring
period.
•
No evidence of physical or electrical
deterioration.
•
The 10 kA (8/20 µs) discharge voltages
measured after each test changed by
less than 10% from the initial values.
1
0.9
0.1
1
10
100
1000
10000
Time Duration in Seconds
Figure 2. Temporary overvoltage curve. No prior duty – 60° C ambient.
www.cooperpower.com TD235007EN-3
Technical Data TD235007EN
VariSTAR Type AZL heavy-duty distribution-class MOV arrester
Effective September 2014
Protective characteristics
The protective characteristics of the VariSTAR AZL arresters are
shown in Table 2.
Table 2. Protective Characteristics
Arrester
Rating
(kV rms)
Front-of-wave
Protective
Level*
(kV crest)
MCOV
(kV rms)
Maximum Discharge Voltage (kV crest)
8/20 µs Current Wave
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
3
2.55
10.7
8.2
8.7
9.2
10.0
11.3
13.6
6
5.10
21.4
16.4
17.4
18.4
20.0
22.5
27.1
9
7.65
32.1
24.5
26.1
27.5
30.0
33.8
40.7
10
8.40
35.3
27.0
28.7
30.3
33.0
37.2
44.7
12
10.20
42.8
32.7
34.7
36.7
40.0
45.0
54.2
15
12.70
53.5
40.9
43.4
45.9
40.0
56.3
67.8
18
15.30
64.2
49.1
52.1
55.1
60.0
67.6
81.4
21
17.00
74.9
57.3
60.8
64.3
70.0
78.8
94.9
24
19.50
84.3
64.4
68.4
72.3
78.8
88.7
106.8
27
22.00
95.2
72.8
77.3
81.7
89.0
100.2
120.7
30
24.40
105.9
81.0
86.0
90.9
99.0
111.5
134.2
36
29.00
124.8
95.4
101.3
107.0
116.6
131.3
158.1
* Based on 10 kA current impulse that results in a discharge voltage cresting in 0.5µs.
Insulation characteristics
The insulation characteristics of the VariSTAR AZL arresters are
shown in Table 3.
Table 3. Insulation Characteristics
Creepage
Arrester
Rating (kV
rms)
(in.)
3
2.8
Strike
Insulation Withstand Voltages
(cm)
(in.)
(cm)
1.2/50 μs
Impulse
(kV crest)
1 min.
Dry
(kV rms)
10 sec.
Wet
(kV rms)
7.1
2.0
5.1
45
15
13
6
6.6
16.8
4.5
11.4
60
21
20
9
10.4
26.4
7.0
17.8
75
27
24
10
10.4
26.4
7.0
17.8
75
27
24
12
13.2
33.5
8.9
22.6
95
35
30
15
13.2
33.5
8.9
22.6
95
35
30
18
17.9
45.5
12.0
30.5
125
42
36
21
17.9
45.5
12.0
30.5
125
42
36
24
21.7
55.1
14.4
36.6
150
70
60
27
21.7
55.1
14.4
36.6
150
70
60
30*
26.4
67.1
17.5
44.5
200
95
80
36*
26.4
67.1
17.5
44.5
200
95
80
* Not applicable to AZL19C Series.
TD235007EN-4 www.cooperpower.com
Technical Data TD235007EN
VariSTAR Type AZL heavy-duty distribution-class MOV arrester
Effective September 2014
Dimensions and clearances
The dimensions and clearances of the VariSTAR AZL arresters are
shown in Figures 4, 5 and 6.
Dimensions
Minimum Recommended Clearances*
Arrester
Rating
(kV rms)
(in.)
(cm)
(in.)
3
6
9
10
12
15
18
21
24
27
30
36
9.19
11.67
14.77
14.77
17.25
17.25
20.97
20.97
24.07
24.07
27.79
27.79
23.3
29.6
37.5
37.5
43.8
43.8
53.3
53.3
61.1
61.1
70.6
70.6
5.20
5.20
5.82
5.82
6.44
6.44
7.06
7.06
7.68
7.68
8.30
8.30
A
B
Phase-to-Ground
Phase-to-Phase
(cm)
(in.)
(cm)
(in.)
(cm)
13.2
13.2
14.8
14.8
16.4
16.4
17.9
17.9
19.5
19.5
21.1
21.1
3.4
4.4
5.6
5.6
6.4
7.1
9.6
9.6
11.1
11.1
11.1
13.1
8.6
11.2
14.2
14.2
16.3
18.0
24.4
24.4
28.2
28.2
28.2
33.3
5.2
6.5
8.0
8.0
8.7
9.7
12.2
12.2
14.2
14.2
14.2
17.2
13.2
16.5
20.3
20.3
22.1
24.6
31.0
31.0
36.1
36.1
36.1
43.7
0.20”
2.68”
TO
4.00”
4.00”
TO
5.00”
3.06”
DIA.
A
2.56”
1.69”
B
2.34”
3.87”
Figure 3. Dimensions for AZL1A, AZL1B, and AZL19B series.
* All clearances are measured from centerline of arrester per IEEE Std C62.11™-1987 standard.
Minimum Recommended
Clearances*
Dimensions
Arrester
Rating
(kV rms)
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
(in.)
3
6
9
10
12
15
18
21
24
27
30
36
9.19
11.67
14.77
14.77
17.25
17.25
20.97
20.97
24.07
24.07
27.79
27.79
23.3
29.6
37.5
37.5
43.8
43.8
53.3
53.3
61.1
61.1
70.6
70.6
5.20
5.20
5.82
5.82
6.44
6.44
7.06
7.06
7.68
7.68
8.3
8.30
13.2
13.2
14.8
14.8
16.4
16.4
17.9
17.9
19.5
19.5
21.1
21.1
6.04
8.52
11.00
11.00
12.86
12.86
15.96
15.96
18.44
21.22
24.32
24.32
15.3
21.6
27.9
27.9
32.7
32.7
40.5
40.5
46.8
53.9
61.8
61.8
10.77
13.25
15.73
15.73
17.59
17.59
20.69
20.69
23.17
32.20
35.30
35.30
27.4
33.7
40.0
40.0
44.7
44.7
52.6
52.6
58.9
81.8
89.7
89.7
4.12
4.12
4.12
4.12
4.12
4.12
4.12
4.12
4.12
4.38
4.38
4.38
A
B
C
D
Phase-to-Ground
Phase-toPhase
(cm)
(in.)
(cm)
(in.)
(cm)
10.5
10.5
10.5
10.5
10.5
10.5
10.5
10.5
10.5
11.1
11.1
11.1
3.4
4.5
5.6
5.6
6.4
7.1
9.6
9.6
11.1
11.1
11.1
13.1
8.6
11.4
14.2
14.2
16.3
18.0
24.4
24.4
28.2
28.2
28.2
33.3
5.2
6.5
8.0
8.0
8.7
9.7
12.2
12.2
14.2
14.2
14.2
17.2
13.2
16.5
20.3
20.3
22.1
24.6
31.0
31.0
36.1
36.1
36.1
43.7
E
Figure 4. Dimensions for AZL31B series.
NNote: Columns B, C, & D are calculated with the bracket located at the top of the bellyband region.
0.20”
NNote: Mounting Lug Spacing for 3 through 24 kV is 2.5” (6.4 cm) and for 27 through 36 kV is 9.25” (23.5 cm).
*All clearances are measured from centerline of arrester per IEEE C62.11™-1987 standard..
C
IMPORTANT
The values shown in Figures 3, 4, and 5 are the minimum
clearances recommended by Eaton's Cooper Power Systems. These
clearances may be revised to meet local or system requirements
for spacing or energized equipment. However, safe operating
procedures must always be followed.
3.06”
DIA.
A
D
2.75"
REF.
B
E
TOP VIEW
SIDE VIEW
www.cooperpower.com TD235007EN-5
Technical Data TD235007EN
VariSTAR Type AZL heavy-duty distribution-class MOV arrester
Effective September 2014
Minimum Recommended Clearances*
Enclosure Application
Outdoor Application
Dimensions
Arrester
Rating
(kV rms)
Phase-to-Ground
Phase-to-Phase
Phase-to-Ground
Phase-to-Phase
A
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
(in.)
B
(cm)
3
2.25
5.7
4.05
10.3
2.50
6.4
4.30
10.9
8.38
21.3
4.39
11.2
6
3.05
7.7
5.10
13.0
3.55
9.0
5.60
14.2
10.86
27.6
4.39
11.2
9
3.80
9.7
6.10
15.5
4.55
11.6
6.85
17.4
13.96
35.5
50.1
12.7
10
4.05
10.3
6.35
16.1
4.80
12.2
7.10
18.0
13.96
35.5
5.01
12.7
12
4.55
11.6
6.85
12.4
5.75
14.6
8.05
20.5
16.44
41.8
5.63
14.3
15
5.30
13.5
7.85
19.9
6.75
17.2
9.30
23.6
16.44
41.8
5.63
14.3
18
6.15
15.6
8.70
22.1
7.85
20.0
10.40
26.4
20.16
51.2
6.25
15.9
21
7.05
17.9
9.60
24.4
9.25
23.5
11.80
30.0
20.16
51.2
6.25
15.9
24
7.85
19.9
10.90
27.7
9.85
25.0
12.90
32.8
23.26
59.1
6.87
17.4
27
8.75
22.2
11.80
30.0
11.45
29.1
14.50
36.8
23.26
59.1
6.87
17.4
Figure 5. Dimensions for AZL19C series.
0.20”
* All clearances are measured from centerline of arrester and are based upon the protective characteristics of the arrester.
1.24”
3.06”
DIA.
A
Ordering information
To order an Eaton's Cooper Power Systems VariSTAR AZL arrester,
determine the voltage rating for the intended application using Table
1.
B
Specify the appropriate catalog number from Table 4. Contact an
Eaton's Cooper Power Systems representative for applications not
listed.
2.34”
3.87”
Table 4. Ordering Information
Catalog Numbers: VariSTAR Type AZL Arrester
Arrester Rating
(kV rms)
Crossarm
Bracket and Line Lead
Without Crossarm
Bracket
Crossarm Bracket
Transformer Mounting
Bracket
Cubicle Mounted
(Without Isolator)
3
AZL1A3R
AZL19B3R
AZL1B3R
AZL31B3R
AZL19C503R
6
AZL1A6R
AZL19B6R
AZL1B6R
AZL31B6R
AZL19C506R
9
AZL1A9R
AZL19B9R
AZL1B9R
AZL31B9R
AZL19C509R
10
AZL1A10R
AZL19B10R
AZL1B10R
AZL31B10R
AZL19C510R
12
AZL1A12R
AZL19B12R
AZL1B12R
AZL31B12R
AZL19C512R
15
AZL1A15R
AZL19B15R
AZL1B15R
AZL31B15R
AZL19C515R
18
AZL1A18R
AZL19B18R
AZL1B18R
AZL31B18R
AZL19C518R
21
AZL1A21R
AZL19B21R
AZL1B21R
AZL31B21R
AZL19C521R
24
AZL1A24R
AZL19B24R
AZL1B24R
AZL31B24R
AZL19C524R
27
AZL1A27R
AZL19B27R
AZL1B27R
AZL31B27R
AZL19C527R
30
AZL1A30R
AZL19B30R
AZL1B30R
AZL31B30R
36
AZL1A36R
AZL19B36R
AZL1B36R
AZL31B36R
TD235007EN-6 www.cooperpower.com
VariSTAR Type AZL heavy-duty distribution-class MOV arrester
Technical Data TD235007EN
Effective September 2014
This page is intentionally left blank.
www.cooperpower.com TD235007EN-7
Technical Data TD235007EN
VariSTAR Type AZL heavy-duty distribution-class MOV arrester
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235007EN
TD235007EN-8
Eaton, Cooper Power Systems, Isolator, and
VariSTAR are valuable trademarks of Eaton in
the U.S. and other countries. You are not permitted to use the these trademarks without
the prior written consent of Eaton.
IEEE Std C62.11™-1987 standard is a
trademark of the Institute of Electrical and
Electronics Engineers, Inc., (IEEE). This publication is not endorsed or approved by the
IEEE.
For Eaton’s Cooper Power
Systems VariSTAR AZL surge
arrester product information
call 1-877-277-4636 or visit:
www.cooperpower.com.
Technical Data TD235008EN
Effective September 2014
Supersedes 235-73 March 1996
VariSTAR™ AZS normal-duty
distribution-class MOV arrester
General
Eaton's Cooper Power Systems VariSTAR™ AZS
normal-duty distribution-class MOV arrester
in ratings of 3 through 36 kV, incorporates the
latest in metal oxide varistor (MOV) technology
in a porcelain design. With this combination of
technologies, Eaton's Cooper Power Systems
can offer reliable and cost effective overhead
protection of distribution systems.
Construction
The VariSTAR AZS arrester consists of highly
nonlinear metal oxide varistors enclosed in a
porcelain housing. The highly nonlinear nature of
the MOV disks results in conduction of leakage
current of milliamperes at nominal line-to-ground
operating voltage. This small amount of leakage
current (which is primarily capacitive current with
a small component of resistive current) can be
tolerated on a continuous basis.
The VariSTAR AZS design is available with or
without an isolator and can be supplied with a
variety of mounting brackets to satisfy a wide
range of applications.
Operation
The operation of the VariSTAR AZS arrester is
typical of gapless metal oxide arresters. During
steady state conditions, nominal line-to-ground
voltage is applied continuously across the
arrester‘s terminals. When overvoltages occur,
the AZS arrester limits the overvoltage to required
protective levels by conducting the surge current.
Upon passage of the overvoltage condition, the
arrester returns to a highly nonlinear steady state,
conducting minimal leakage current.
The superior protective characteristics of the
VariSTAR AZS arrester provide excellent protection
for distribution transformers with lower impulse
withstand capabilities. Its superior reliability
makes it an ideal choice for areas with moderate
isokeraunic levels.
TD235008EN-1
Technical Data TD235008EN
VariSTAR AZS normal-duty distribution-class MOV arrester
Effective September 2014
Features and detailed description
Production tests
A complete production test program
ensures a quality product. Each VariSTAR
metal oxide varistor receives a series of
electrical tests. Quality is further ensured by
a series of destructive tests performed on
every batch of varistors. Listed are the tests
that are performed on the varistors:
INSULATING TERMINAL CAP
Polymer cap provides
superior wildlife protection.
•
100% Physical Inspection
TOP ELECTRODE
•
100% Discharge Voltage Test
Ensures low resistive
contact to MOV disk
column.
•
100% V1mA/cm2
•
100% Leakage Current at 80% of V1mA/cm2 Voltage
HIGH STRENGTH WET
PROCESS GLAZED
PORCELAIN
•
Batch High-current, Short-duration Test
•
Batch Thermal Stability Test
Withstands thermal
and mechanical shocks;
excellent washing
characteristics;
provides high creepage
distance above and
below the hanger
bracket.
•
Batch Disk Aging Test
MOV DISKS
Highly nonlinear metal
oxide varistors provide
exceptional surge
protection.
Each VariSTAR AZS arrester must pass the
following production tests:
•
100% Physical Inspection
•
100% Vacuum over Fluid Seal Test
•
100% Leakage Current Test
•
100% RIV Test
Standards
The VariSTAR AZS arrester complies with
the latest revision of IEEE C62.11™-1987
standard, “IEEE Standard for Metal Oxide
Surge Arresters for AC Power Circuits”.
ALUMINUM SPACER
Provides additional
length for extended
creepage porcelain.
HEAVY STEEL
COIL SPRING
COPPER STRAP
Provides a low resistance
shunt for surge current
discharge.
ISOLATOR™ GROUND
LEAD DISCONNECTOR
Provides positive
isolation and visual
identification if arrester
becomes damaged
internally.
Maintains high
pressure on disks for
effective contact
surfaces; protects from
mechanical shock.
IDENTIFICATION
INFORMATION
General application
recommendations
The rating of an arrester is the power
frequency line-to-ground voltage at
which the arrester is designed to pass an
operating duty-cycle test. Table 1 provides a
general application guide for the selection of
the proper arrester rating for a given system
voltage and system grounding configuration.
Eaton's Cooper Power Systems
application engineers are available to make
recommendations. The following information
is normally required:
1. System maximum operating voltage.
2. System grounding conditions.
A. For four-wire circuits, grounding
conditions depend upon whether
the system is multi-grounded,
whether it has a neutral impedance
and whether common primary and
secondary neutrals are used.
Convenient reference
for arrester type,
MCOV, voltage rating
and year and quarter of
manufacture.
SOLDERLESS
CONNECTORS
Accommodates No. 10
solid through No. 2/0
stranded line and
ground leads.
Figure 1. Cutaway illustration of VariSTAR AZS arrester.
TD235008EN-2 www.cooperpower.com
B. For three-wire circuits, grounding
conditions depend upon whether
the system is solidly grounded
at the source, grounded through
neutral impedance at the source
transformers or ungrounded.
VariSTAR AZS normal-duty distribution-class MOV arrester
Technical Data TD235008EN
Effective September 2014
Table 1. Commonly Applied Voltage Ratings of the VariSTAR
Type AZS Arrester
System Voltage
(kV rms)
Recommended Arrester Rating
(kV rms)
Nominal
Maximum
Four-Wire
Wye
MultiGrounded
Neutral
Three-Wire
Wye
Solidly
Grounded
Neutral
Delta and
Ungrounded
Wye
2.4
2.54
–
–
3
4.16Y/2.4
4.4Y/2.54
3
6
6
4.16
4.4
–
–
6
Where unusual conditions exist (high ground resistance, high
capacitive load, arc-welding equipment, etc.) the following
supplementary information is necessary:
1. The unusual condition.
2. Type of construction, phase spacing, length of line, conductor
size.
3. BIL of equipment and line insulation.
4. Phase-sequence components of impedances on the load side of
the distribution substation.
The impedance of the transformer and the impedance and
grounding of supply to the substation all affect the voltage during
faults.
4.8
5.08
–
–
6
6.9
7.26
–
–
9
8.32Y/4.8
8.8Y/5.08
6
9
–
Temporary overvoltage (Tov) capability
12.0Y/6.93
12.7Y/7.33
9
12
–
The Temporary Overvoltage (TOV) capability of the VariSTAR AZS
arrester is shown in Figure 2.
12.47Y/7.2
13.2Y/7.62
9
15
–
13.2Y/7.62
13.97Y/8.07
10
15
–
Performance test characteristics
13.8Y/7.97
14.52Y/8.38
10
15
–
13.8
14.52
–
–
18
The VariSTAR AZS arrester consistently withstands the following
design tests as described by IEEE Std C62.11™-1987 standard:
20.78Y/12.0
22Y/12.7
15
21
–
•
Duty Cycle:
• 22 current surges of 5 kA crest 8/20 µs waveshape.
•
High-current, Short-duration Discharge:
• 2 current surges of 65 kA crest 4/10 µs waveshape.
•
Low-current, Long-duration Discharge:
• 20 current surges of 75 A crest 2000 µs rectangle wave
duration.
22.86Y/13.2
24.2Y/13.87
18
24
–
23
24.34
–
–
30
24.94Y/14.4
26.4Y/15.24
18
27
–
27.6Y/15.93
29.3Y/16.89
21
30
–
34.5Y/19.92
36.5Y/21.08
27
36
–
46Y/26.6
48.3Y/28
36
–
–
Following each of these tests, the arresters remain thermally stable
as verified by:
1.7
Per Unit MCOV
1.6
•
Continually decreasing power values during a thirty minute power
monitoring period.
•
No evidence of physical or electrical deterioration.
•
The 5 kA (8/20 µs) discharge voltages measured after each test
changed by less than 10% from the initial values.
1.5
1.4
Per Unit Arrester Rating
1.3
1.2
1.1
1
0.9
0.1
1
10
100
1000
10000
Time Duration in Seconds
Figure 2. Temporary overvoltage curve. No prior duty – 60° C
ambient.
www.cooperpower.com TD235008EN-3
VariSTAR AZS normal-duty distribution-class MOV arrester
Technical Data TD235008EN
Effective September 2014
Protective characteristics
The protective characteristics of the VariSTAR AZS arresters are
shown in Table 2.
Table 2. Protective Characteristics
Maximum Discharge voltage (kV crest)
8/20 μs Current Wave
MCOV (kV rms)
Frontof-wave
Protective
Level* (kV
crest)
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
2.55
10.2
8.6
9.2
9.8
10.8
12.8
15.9
6
5.10
20.4
17.2
18.4
19.6
21.7
25.5
31.9
9
7.65
30.6
25.8
27.6
29.4
32.5
38.3
47.8
10
8.40
33.7
28.4
30.5
32.4
35.9
42.2
52.7
12
10.20
40.8
34.4
36.8
39.2
43.4
51.0
63.8
15
12.70
51.0
43.0
46.1
49.0
54.2
63.8
79.7
18
15.30
61.2
51.6
55.3
58.8
65.1
76.6
95.7
21
17.00
71.3
60.2
64.5
68.6
75.9
89.3
111.6
24
19.50
80.4
67.8
72.7
77.4
85.6
100.7
125.8
27
22.00
91.9
77.5
83.1
88.4
97.9
115.1
143.8
30
24.40
101.1
85.2
91.4
97.2
107.6
126.6
158.1
36
29.00
119.5
100.8
108.1
115.0
127.2
149.7
187.0
Arrester
Rating (kV
rms)
3
* Based on 5 kA current impulse that results in a discharge voltage cresting in 0.5µs.
Insulation characteristics
The insulation characteristics of the VariSTAR AZS arresters are
shown in Table 3.
Table 3. Insulation Characteristics
Characteristics for AZS100M, AZS101M, AND AZS103M series*
Arrester
Rating (kV
rms)
Creepage
Strike
(in.)
(cm)
(in.)
3
2.8
7.1
6
6.6
16.8
9
10.4
10
12
Characteristics for basemount (AZS100C series)
1 min Wet
(kV rms)
10 sec
Wet
(kV rms)
Creepage
Strike
(in.)
(cm)
(in.)
(cm)
1.2/50 us
impulse
(kV crest)
1 min
Dry (kV
rms)
10 sec Wet
(kV rms)
45
15
13
10.9
27.7
8.7
22.1
125
70
60
60
21
20
10.9
27.7
8.7
22.1
125
70
60
17.8
75
27
24
13.5
34.3
10.4
26.4
150
80
70
7.0
17.8
75
27
24
13.5
34.3
10.4
26.4
150
80
70
8.9
22.6
95
35
30
13.5
34.3
10.4
26.4
150
80
70
33.5
8.9
22.6
95
35
30
16.6
42.2
12.6
32.0
175
90
80
45.5
12.0
30.5
125
42
36
16.6
42.2
12.6
32.0
175
90
80
17.9
45.5
12.0
30.5
125
42
36
–
–
–
–
–
–
–
21.7
55.1
14.4
36.6
150
70
60
–
–
–
–
–
–
–
27
21.7
55.1
14.4
36.6
150
70
60
–
–
–
–
–
–
–
30**
26.4
67.1
17.5
44.5
200
95
80
–
–
–
–
–
–
–
36**
26.4
67.1
17.5
44.5
200
95
80
–
–
–
–
–
–
–
(cm)
1.2/50 us
impulse
(kV crest)
2.0
5.1
4.5
11.4
26.4
7.0
10.4
26.4
13.2
33.5
15
13.2
18
17.9
21
24
* Refer to pages 5 and 6.
**Not applicable to AZS103M Series.
TD235008EN-4 www.cooperpower.com
VariSTAR AZS normal-duty distribution-class MOV arrester
Technical Data TD235008EN
Effective September 2014
Dimensions and clearances
The dimensions and clearances of the VariSTAR AZS arresters are
shown in Figures 4, 5 and 6.
Dimensions
Minimum Recommended Clearances*
Arrester
Rating
(kV rms)
A
B
Phase-to-Ground
Phase-to-Phase
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
3
9.19
23.3
5.20
13.2
3.4
8.6
5.2
13.2
6
11.67
29.6
5.20
13.2
4.4
11.2
6.5
16.5
9
14.77
37.5
5.82
14.8
5.6
14.2
8.0
20.3
10
14.77
37.5
5.82
14.8
5.6
14.2
8.0
20.3
12
17.25
43.8
6.44
16.4
6.4
16.3
8.7
22.1
15
17.25
43.8
6.44
16.4
7.1
18.0
9.7
24.6
18
20.97
53.3
7.06
17.9
9.6
24.4
12.2
31.0
21
20.97
53.3
7.06
17.9
9.6
24.4
12.2
31.0
24
24.07
61.1
7.68
19.5
11.1
28.2
14.2
36.1
27
24.07
61.1
7.68
19.5
11.1
28.2
14.2
36.1
30
27.79
70.6
8.30
21.1
11.1
28.2
14.2
36.1
36
27.79
70.6
8.30
21.1
13.1
33.3
17.2
43.7
0.20
2.68
to
4.00
3.06
DIA.
4.00
to
5.00
A
2.56
1.69
B
2.34
3.87
Figure 3. Dimensions for AZS100M and AZS101M series.
* All clearances are measured from centerline of arrester per IEEE C62.11™-1987 standard.
Dimensions
Arrester
Rating
(kV rms)
A
(in.)
Minimum Recommended Clearances*
B
(cm)
(in.)
C
(cm)
(in.)
D
(cm)
(in.)
E
(cm)
(in.)
(cm)
Phase-to-Ground
Phase-to-Phase
(in.)
(in.)
(cm)
(cm)
3
9.19
23.3
5.20
13.2
6.04
15.3
10.77
27.4
4.12
10.5
3.4
8.6
5.2
13.2
6
11.67
29.6
5.20
13.2
8.52
21.6
13.25
33.7
4.12
10.5
4.5
11.4
6.5
16.5
9
14.77
37.5
5.82
14.8
11.00
27.9
15.73
40.0
4.12
10.5
5.6
14.2
8.0
20.3
10
14.77
37.5
5.82
14.8
11.00
27.9
15.73
40.0
4.12
10.5
5.6
14.2
8.0
20.3
12
17.25
43.8
6.44
16.4
12.86
32.7
17.59
44.7
4.12
10.5
6.4
16.3
8.7
22.1
15
17.25
43.8
6.44
16.4
12.86
32.7
17.59
44.7
4.12
10.5
7.1
18.0
9.7
24.6
18
20.97
53.3
7.06
17.9
15.96
40.5
20.69
52.6
4.12
10.5
9.6
24.4
12.2
31.0
21
20.97
53.3
7.06
17.9
15.96
40.5
20.69
52.6
4.12
10.5
9.6
24.4
12.2
31.0
24
24.07
61.1
7.68
19.5
18.44
46.8
23.17
58.9
4.12
10.5
11.1
28.2
14.2
36.1
27
24.07
61.1
7.68
19.5
21.22
53.9
32.20
81.8
4.38
11.1
11.1
28.2
14.2
36.1
Figure 4. Dimensions for AZS103M series.
0.20
NNote: Columns B, C, & D are calculated with the bracket located at the top of the bellyband region
NNote: Mounting Lug Spacing for 3 through 24 kV is 2.5” (6.4 cm) and for 27 kV is 9.25” (23.5 cm).
* All clearances are measured from centerline of arrester per IEEE Std C62.11™-1987 standard.
C
IMPORTANT
The values shown in Figures 3, 4, and 5 are the minimum
clearances recommended by Eaton's Cooper Power Systems.
These clearances may be revised to meet local or system
requirements for spacing or energized equipment. However, safe
operating procedures must always be followed.
3.06
DIA.
A
D
2.75"
REF.
B
TOP VIEW
E
SIDE VIEW
www.cooperpower.com TD235008EN-5
VariSTAR AZS normal-duty distribution-class MOV arrester
Technical Data TD235008EN
Effective September 2014
Minimum Recommended Clearances*
Enclosure Application
Outdoor Application
Phase-to-Ground
Phase-to-Ground
Phase-to-Phase
Phase-to-Phase
Dimension A
Arrester
Rating
(kV rms)
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
(in.)
(cm)
3
3.2
8.1
4.9
12.4
3.6
9.1
5.1
13.0
11.2
28.4
6
4.2
10.7
6.2
15.7
4.7
11.9
6.5
16.5
11.2
28.4
9
5.5
14.0
7.7
19.6
6.2
15.7
8.1
20.6
13.0
33.0
10
5.5
14.0
7.7
19.6
6.2
15.7
8.1
20.6
13.0
33.0
12
6.2
15.7
8.4
21.3
7.0
17.8
8.8
22.4
13.0
33.0
15
7.0
17.8
9.4
23.9
7.8
19.8
9.9
25.1
15.1
38.5
18
9.5
24.1
11.9
30.2
10.6
26.9
12.5
31.7
15.1
38.5
Figure 5. Dimensions for AZS100C series.
* All clearances are measured from centerline of arrester per IEEE Std C62.11™-1987 standard.
Ordering information
To order a Cooper Power Systems VariSTAR AZS arrester, determine
the voltage rating for the intended application using Table 1.
Specify the appropriate catalog number from Table 4. Contact your
Eaton's Cooper Power Systems representative for applications not
listed.
Table 4. Ordering Information
Catalog Numbers: VariSTAR AZS Arrester
Arrester
Rating
(kV rms)
With NEMA®
Crossarm
Bracket*
Without
NEMA®
Crossarm
Bracket*
Transformer
Mounting
Bracket*
Base Mounted
(Without
Isolator)
3
AZS101M003R
AZS100M003R
AZS103M003R
AZS100C503
6
AZS101M006R
AZS100M006R
AZS103M006R
AZS100C506
9
AZS101M009R
AZS100M009R
AZS103M009R
AZS100C509
10
AZS101M010R
AZS100M010R
AZS103M010R
AZS100C510
12
AZS101M012R
AZS100M012R
AZS103M012R
AZS100C512
15
AZS101M015R
AZS100M015R
AZS103M015R
AZS100C515
18
AZS101M018R
AZS100M018R
AZS103M018R
AZS100C518
21
AZS101M021R
AZS100M021R
AZS103M021R
–
24
AZS101M024R
AZS100M024R
AZS103M024R
–
27
AZS101M027R
AZS100M027R
AZS103M027R
–
30
AZS101M030R
AZS100M030R
–
–
36
AZS101M036R
AZS100M036R
–
–
* Protective terminal cap option available. To order option, change 0 after M in catalog number to 5.
(Example: AZS101M503R)
TD235008EN-6 www.cooperpower.com
A
VariSTAR AZS normal-duty distribution-class MOV arrester
Technical Data TD235008EN
Effective September 2014
This page is intentionally left blank.
www.cooperpower.com TD235008EN-7
Technical Data TD235008EN
VariSTAR AZS normal-duty distribution-class MOV arrester
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235008EN
TD235008EN-8
Eaton, Cooper Power Systems, Isolator, and
VariSTAR are valuable trademarks of Eaton
in the U.S. and other countries. You are
not permitted to use the these trademarks
without the prior written consent of Eaton.
IEEE Std C62.11™-1987 standard is a
trademark of the Institute of Electrical
and Electronics Engineers, Inc. (IEEE).
This publication/product is not endorsed or
approved by the IEEE.
For Eaton's Cooper Power
Systems VariSTAR AZS
MOV surge arrester product
information call 1-877-277-4636
or visit: www.cooperpower.
com.
Technical Data TD235009EN
Effective September 2014
Supersedes 235-87 July 2011
(Replaces TD-223 July 2011)
VariSTAR Type AZE station-class surge
arresters for systems through 345 kV
IEEE certified
General
The VariSTAR™ AZE Surge Arrester from Eaton’s
Cooper Power Systems offers the latest in
metal oxide varistor (MOV) technology for the
economical protection of power and substation
equipment. This arrester is gapless and
constructed of a single series column of MOV
disks. The arrester is designed and tested to the
requirements of IEEE Std C62.11™-1993 standard
and is available in ratings suitable for the transient
overvoltage protection of electrical equipment on
systems through 345 kV.
Eaton’s Cooper Power Systems assures the design
integrity of the AZE arrester through a rigorous
testing program conducted at our manufacturing
and test facility in Olean, NY. The availability of
complete “in-house” testing facilities assures that
as continuous process improvements are made,
they are professionally validated to high technical
standards.
Table 1 contains information on some of the
specific ratings and characteristics of AZE Series
surge arresters.
TD235009EN-1
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Table 1. AZE Ratings and Characteristics
Ratings
Arrester Characteristic
AZES
AZEH
AZEX
System Application Voltages
3-345 kV
3-230 kV
3-138 kV
Arrester Voltage Ratings
3-360 kV
3-240 kV
3-108 kV
Rated Discharge Energy, (kJ/kV of MCOV)
Arrester Ratings: 3-108 kV
120-240 kV
259-360 kV
3.4
5.6
8.9
5.6
8.9
–
8.9
–
–
System Frequency
50/60 Hz
50-60 Hz
50/60 Hz
Impulse Classifying Current
10 kA
10 kA
10 kA
High Current Withstand
100 kA
100 kA
100 kA
Pressure Relief Rating, kA rms sym
Metal-Top Designs
Cubicle-Mount Designs
65 kA
40 kA
65 kA
40 kA
65 kA
–
Cantilever Strength (in-lbs)*
Metal-Top Designs:
3-240 kV
258-360 kV
90,000
120,000
90,000
120,000
90,000
120,000
* Maximum working load should not exceed 40% of this value.
NNote: Terminal load limit for cubicle mount designs should not exceed 100 pounds. Excessive loading could lead to a shortened arrester life.
CUBICLE-MOUNT LINE TERMINAL
Accommodates No. 6 through 500 MCM
copper or aluminum conductor.
METAL-TOP LINE TERMINALS
Accommodates No. 6 through 500 MCM copper
or aluminum conductor.
ALUMINUM-ALLOY END
CASTINGS
Assure true vertical mounting,
three mounting slots
accommodate hardened 0.5”
bolts.
METAL-OXIDE VALVE DISK
(INTERNAL)
Specially formulated metal-oxide
compound provides exceptional
non-linear electrical characteristics
for ideal energy-absorbing
protective levels.
PORCELAIN HOUSING
Withstands thermal and electrical shock;
excellent self-washing characteristics;
skirts designed to provide high creepage
distance.
SEAL
Tested with helium-mass spectrometer
to assure a leakproof seal.
NAMEPLATE
Complete IEEE®
arrester identification; catalog number,
voltage rating, MCOV rating,
serial number, altitude and
pressure relief ratings.
PRESSURE-RELIEF SYSTEM
Pressure actuated system assures
maximum safety and reliability;
vent covers prevent foreign
material from entering vent ports
and also indicate operation.
GROUND TERMINAL
Accommodates No. 6 through 500 MCM
copper or aluminum conductor.
Figure 1. VariSTAR Type AZE arrester construction details.
NNote: Multi-section arresters include an additional unit nameplate showing the order of assembly. For example, a 2-section arrester will have a bottom section with a unit nameplate labeled unit 1 of 2 and the top section with a unit nameplate labeled unit 2 of 2.
TD235009EN-2 www.cooperpower.com
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Construction
Operation
External
The VariSTAR AZE arrester conducts only a few milliamperes of
leakage current when energized at normal system voltage. When
a surge event occurs, the arrester conducts only the current, and
consequently the energy, necessary to limit the overvoltage. It
provides precise and predictable protection, minimizes the absorbed
energy, and does not discharge power frequency systems currents.
The Type AZE station class arrester is available in two design
configurations - a metal-top design in ratings 3-360 kV and a cubiclemount design in ratings 3-48 kV. Cubicle-mount designs are ideally
suited for confined spaces where clearances between live parts are
limited.
The wet-process porcelain housing features an alternating shed
design (ratings >48 kV) that provides excellent resistance to the
effects of atmospheric housing contamination. AZE arresters are
available with optional extra creepage porcelains for use in areas
with extreme natural atmospheric and man-made pollution.
The dielectric properties of the porcelain are coordinated with the
electrical protective characteristics of the arrester. The unit end
castings are of a corrosion-resistant aluminum alloy configured for
interchangeable mounting with other manufacturers’ arresters for
ease in upgrading to the VariSTAR arrester technology. This threefooted mounting is provided on a 8.75 to 10 inch diameter pattern
for customer supplied 0.5 inch diameter hardware.
High Cantilever strength assures mechanical integrity (Table 1
lists the cantilever strength of metal-top AZES arresters). Eaton’s
Cooper Power Systems recommends that a load limit of 100 pounds
not be exceeded on the line terminal of cubicle mount designs.
Loads exceeding this limit could cause a shortening of arrester life.
Housings are available in standard grey or optional brown glaze color.
A controlled and directed pressure relief system is incorporated
in the VariSTAR AZE arrester design. In the unlikely event of an
arrester failure, this pressure venting system rapidly relieves internal
pressure and transfers the internal arc to the outside of the arrester
porcelain through vent ports in the end castings.
When called upon to operate, this mechanism vents internal
pressures in fractions of a cycle-preventing violent arrester failure.
This mechanism is effective to system fault currents up to 65 kA in
metal-top designs and 40 kA in cubicle-mount designs.
General application recommendations
The rating of an arrester is the power-frequency line-to-ground
voltage at which the arrester is designed to pass the IEEE Std
C62.11™-1993 standard duty-cycle test. Table 2 provides a general
guide for the selection of the proper arrester for a given system
voltage. Eaton’s Cooper Power Systems application engineers are
available to make specific system application recommendations.
Standard line and ground terminal connectors accommodate up
to a 0.75 inch diameter conductor. Insulating bases and discharge
counters are optionally available for in-service monitoring of arrester
discharge activity.
The end fittings and porcelain housing of each arrester unit
are sealed and tested by means of a sensitive helium mass
spectrometer; this assures that the quality and insulation protection
provided by the arrester is never compromised over its lifetime
by the entrance of moisture. A corrosion-resistant nameplate is
provided and contains all information required by Standards. In
addition, stacking arrangement information is provided for multi-unit
arresters. Voltage grading rings are included for arresters rated 172
kV and above.
Internal
VariSTAR AZE arresters are a totally gapless MOV design. Gapless
construction makes a significant contribution to the performance of
arresters through the elimination of gap reseal as a consideration
associated with the discharge of switching surge currents. The
specially formulated metal-oxide varistors, manufactured under
Eaton’s Cooper Power Systems exclusive quality control, provide
exceptional non-linear protective characteristics, durability, and
dependable energy dissipation capabilities.
3
www.cooperpower.com TD235009EN-3
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Selection of arrester rating
In arrester rating selection it is preferable to determine the lowest
arrester rating that will ensure satisfactory operation. This is the
optimum solution because the arrester selected will not only provide
the greatest margin of insulation protection but also be the most
economical choice.
Increasing the arrester rating above the minimum increases the
likelihood of arrester survival during potential system contingencies,
but compromises the protection of equipment insulation.
Rating selection should begin with consideration of the maximum
system operating voltage. The maximum power frequency voltage
expected under normal system conditions (line-to-ground) should
not exceed the selected arrester’s maximum continuous operating
voltage (MCOV).
The temporary overvoltage (TOV) capability of the VariSTAR AZE
arrester is shown in Figure 2. The curves indicate the arrester’s
ability to withstand abnormal system power frequency (sinusoidal)
overvoltages for various durations. The values shown assume that
the arrester has been energized at MCOV prior to an overvoltage
event and that the arrester is in an ambient temperature of 60°C.
After the overvoltage durations shown, the arrester will thermally
recover when once again energized at MCOV.
Figure 2 also illustrates the arrester’s TOV capabilities with and
without prior switching surge duties of up to the maximum capability
of the arrester as listed in Table 1 (Rated Discharge Energy).
It is not recommended that the TOV curve be extended for periods
in excess of 10,000 seconds (2.8 hrs.).
For ungrounded systems, systems utilizing high impedance or resonant
grounding and other systems where the line-to-ground voltage may be
elevated to line-to-line voltages for extended periods, arresters having
an MCOV equal to line-to-line voltage may be required.
For non-sinusoidal transient voltages caused by system
switching operations, a transient network analyzer (TNA) study
is recommended; Eaton’s Cooper Power Systems engineers are
available to make these studies.
Table 2. Commonly Applied Voltage Ratings of the VariSTAR
Type AZE Arrester
System Voltage
(kV rms)
Suggested Arrester Rating
(kV rms)
Nominal
Maximum
Solidly Grounded
Neutral
Circuits
High Impedance
Grounded,
Ungrounded, or
Temporarily
Ungrounded
Circuits
2.4
2.52
–
3
4.16
4.37
3
6
4.8
5.04
–
6
6.9
7.24
–
9
12.47
13.2
9-10
–
13.2
14.0
10
15-18
13.8
14.5
10-12
15-18
20.7
21.8
15
–
23.0
24.2
–
24-27
24.9
26.4
18-21
–
27.6
29.0
21-24
27-30
34.5
36.5
27-30
36-39
46.0
48.3
–
48
69.0
72.5
54-60
66-72
115
121
90-96
108-120
138
145
108-120
132-144
161
169
120-144
144-168
230
242
172-192
228-240
345
362
258-312
288-360
To assure proper application, the following information is normally
required:
1.7
1. Maximum system operating voltage.
2. System grounding conditions.
B. For three-wire circuits, grounding conditions depend upon
whether the system is solidly grounded at the source,
grounded through neutral impedance at the source, grounded
through transformers, or ungrounded.
Where unusual conditions exist (high ground resistance, high
capacitive load, unusual switching surge duty, etc.) the following
supplementary information is required.
1. Type of unusual condition.
2. BIL of equipment and separation distance to protected
equipment.
3. Type of construction (phase spacing, length of line, conductor
size, etc.).
4. Grounding and phase-sequence components of source
impedances.
5. Phase-sequence components of load impedances.
6. Available fault current.
7. Potential for loss of neutral grounding during system events.
TD235009EN-4 www.cooperpower.com
60° C AMBIENT
TEMPERATURE
VOLTAGE IN PER UNIT MCOV
A. For four-wire circuits, grounding conditions depend upon
whether the system is multi-grounded, whether it has neutral
impedance, and whether common primary and secondary
neutrals are used.
1.6
NO PRIOR DUTY CURVE
1.5
1.4
PRIOR DUTY CURVE
(RATED DISCHARGE
ENERGY, SEE TABLE 1)
1.3
1.2
1.1
0.01
0.1
1
10
100
1000
MAXIMUM DURATION (SECONDS)
Figure 2. Temporary overvoltage capability of VariSTAR AZE
surge arresters.
10000
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Routine tests
"C"
A complete production test program assures the quality of every
VariSTAR AZE surge arrester. Each completed arrester is required
to satisfactorily pass the following test regimen conducted in
accordance with the procedures established in IEEE Std C62.11™1993 standard.
•
Partial Discharge Test at 1.05 times MCOV.
•
Power Frequency Test at 1.20 times MCOV.
•
Discharge Voltage Test.
•
Sealing Effectiveness Test of Housing by helium mass
spectrometer.
"C"
"B"
"B"
DIRECTED
VENT PORT
Figure 3. Three-phase in-line mounting, top view.
Standards
Note: Refer to Tables 4 and 5 for Dimensions “B” and “C”.
The VariSTAR AZE surge arrester has been tested and certified
to IEEE Std C62.11™-1993 standard. Guaranteed performance
characteristics are specified in this catalog section and in the
relevant “Design Certification Test Report” Eaton’s Cooper Power
Systems bulletin 95028.
Dimensions and mounting
Figure 3 illustrates an in-line mounting arrangement; the applicable
minimum values of “B” and “C” may be found in Tables 4 and 5.
Line and ground terminal details are shown in Figure 4; the supplied
terminals accommodate aluminum and copper conductors to a
maximum size of 0.75 inch.
For other conductors the terminal drilling pattern shown will
accommodate industry standard two (2) and four (4) hole flat pad
connectors having a 1.75 inch spacing. Figure 5 on page 9 provides
the dimensional details for universal base mounting.
Performance and protective characteristics
Table 3 displays the Arrester Rating, Maximum Continuous
Operating Voltage (MCOV), and the guaranteed protective
characteristics of the AZES surge arrester.
The Front-of-Wave protective level is the maximum discharge
voltage for a 10 kA current impulse which results in a discharge
voltage cresting in 0.5 microseconds. Lightning impulse Discharge
Voltages represent the maximum voltage levels generated by
the arrester when discharging lightning currents of the standard
8/20 microsecond wave-shape. The maximum Switching Impulse
Discharge Voltages are based on a switching surge current having a
time to crest of 45 to 60 microseconds.
The vent port in the base must be directed away from any adjacent
equipment to control and prevent ionized gases from damaging
other equipment in the unlikely event of arrester failure.
3.0”
(7.62 cm)
3.0”
(7.62 cm)
TYPICAL
4 PLACES
CLAMP
1.75”
(4.44 cm)
TYPICAL
4 PLACES
3.75”
(9.52 cm)
0.75”
(1.90 cm)
1.75”
(4.44 cm)
0.56” (1.43 cm) DIA
HOLES ON 1.75”
(4.44 cm) CENTERS
Line Terminal (Metal-Top Design)
3.75”
(9.52 cm)
0.56” (1.43 cm) DIA
HOLES ON 1.75”
(4.44 cm) CENTERS
Ground Terminal (also Line Terminal
for Cubicle-Mount Design)
Table 4. Line and ground terminals (suitable for copper or aluminum conductors up to 0.75” diameter).
www.cooperpower.com TD235009EN-5
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Table 3. Discharge Voltages - Maximum Guaranteed Protective Characteristics for AZES Surge Arresters
Arrester
MCOV
(kV rms)
1 sec
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
2.55
5.10
7.65
8.40
10.2
12.7
15.3
17.0
19.5
22.0
24.4
27.5
29.0
31.5
34.0
36.5
39.0
42.0
48.0
53.0
57.0
62.0
68.0
70.0
76.0
84.0
98.0
106
111
115
130
131
140
144
152
160
165
174
180
3.73
7.47
11.2
12.3
14.9
18.6
22.4
24.9
28.6
32.2
35.7
40.3
42.5
46.1
49.8
53.4
57.1
61.5
70.3
77.6
83.5
90.8
99.6
102.5
111.3
123.0
143.5
155.2
162.5
168.4
190.3
191.8
205.0
210.8
222.5
234.2
241.6
254.7
263.5
240
258
264
276
288
294
300
312
330
336
360
190
209
212
220
230
235
239
245
267
269
289
278.2
–
–
–
–
–
–
–
–
–
–
Switching Surge
Protective Level***
(kV crest)
10 sec
Front-of-wave Maximum Discharge Voltage (kV crest)
Protective
8/20 µs Current Wave
Level**
(kV Crest)
1.5 kA 3 kA
5 kA
10 kA 20 kA
40 kA
125 A
250 A
500 A
1000 A 2000A
3.56
7.11
10.7
11.7
14.2
17.7
21.3
23.7
27.2
30.7
34.0
38.4
40.5
43.9
47.4
50.9
54.4
58.6
67.0
73.9
79.5
86.5
94.9
97.7
106.0
117.2
136.7
147.9
154.9
160.4
181.4
182.8
195.3
200.9
212.0
223.2
230.2
242.7
251.1
9.3
18.2
27.2
29.7
36.0
44.7
53.7
59.7
68.4
77.0
85.4
96.2
101
111
119
128
136
147
167
186
200
217
237
245
265
293
321
349
365
378
427
430
459
472
499
525
541
570
591
7.0
13.9
20.9
23.0
27.9
34.7
41.8
46.4
53.3
60.1
66.6
75.1
79.2
86.0
92.8
99.7
107
115
131
145
156
169
186
191
208
229
255
276
289
300
339
341
365
375
396
417
430
453
469
7.4
14.7
22.0
24.2
29.4
36.6
44.0
48.9
56.1
63.3
70.2
79.1
83.4
90.6
97.8
105
112
121
138
153
164
178
196
201
219
242
269
290
304
315
356
359
384
395
417
439
452
477
493
7.7
15.4
23.1
25.4
30.8
38.3
46.2
51.3
58.8
66.3
73.6
82.9
87.4
95.0
103
110
118
127
145
160
172
187
205
211
229
253
279
302
316
327
370
373
398
410
432
455
469
495
512
8.4
16.7
25.0
27.4
33.3
41.4
49.8
55.4
63.5
71.6
79.4
89.5
94.4
103
111
119
127
137
156
173
186
202
221
228
247
273
298
323
338
350
396
399
426
438
463
487
502
529
548
9.4
18.6
27.7
30.4
36.9
45.9
55.2
61.3
70.3
79.3
87.9
99.1
105
113
122
131
140
151
173
191
205
223
245
252
274
302
328
355
372
385
435
438
468
482
509
536
552
582
602
11.0
21.4
31.7
34.8
42.1
52.2
62.8
69.7
79.9
90.0
99.8
112
119
129
139
149
159
171
196
217
233
253
278
286
310
343
366
396
415
430
486
489
523
538
568
598
617
650
672
6.1
12.2
18.3
20.1
24.4
30.4
36.6
40.7
46.7
52.7
58.4
65.9
69.5
75.4
81.4
87.4
93.4
101
115
127
137
149
163
168
182
201
226
244
256
265
300
302
323
332
350
369
380
401
415
6.3
12.6
18.9
20.7
25.2
31.3
37.7
41.9
48.1
54.3
60.2
67.8
71.5
77.7
83.9
90.0
96.2
104
118
131
141
153
168
173
188
207
232
250
262
272
307
309
331
340
359
378
390
411
425
6.5
13.0
19.5
21.4
26.0
32.4
39.0
43.4
49.8
56.1
62.3
70.2
74.0
80.4
86.8
93.1
99.5
107
123
135
145
158
174
179
194
214
238
258
270
279
316
318
340
350
369
389
401
423
437
6.7
13.5
20.2
22.2
26.9
33.5
40.4
44.9
51.5
58.1
64.4
72.6
76.6
83.1
89.7
96.3
103
111
127
140
151
164
179
185
201
222
247
267
280
290
327
330
352
362
383
403
415
438
453
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
265.1
–
–
–
–
–
–
–
–
–
–
623
684
693
720
751
767
781
801
872
879
945
495
547
555
575
602
615
625
630
698
704
756
521
568
576
598
625
639
650
655
726
731
785
540
580
588
611
639
652
663
669
741
747
802
578
605
613
637
665
679
691
709
772
778
836
636
666
675
701
732
748
761
780
850
856
920
709
771
782
811
848
866
881
903
985
991
1064
438
–
–
–
–
–
–
–
–
–
–
449
–
–
–
–
–
–
–
–
–
–
462
502
509
528
552
564
574
578
641
645
693
478
526
533
553
578
591
601
606
671
676
727
–
535
543
563
589
602
612
617
683
689
740
TOV*
(kV rms)
Arrester
Rating
(kV rms)
* Temporary overvoltage with prior duty energy surge.
** Based on a 10 kA current impulse that results in a discharge voltage cresting in a 0.5 µs.
*** 45-60 µs rise time current surge.
TD235009EN-6 www.cooperpower.com
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Table 4. Discharge Voltages - Maximum Guaranteed Protective Characteristics for Type AZEH Surge Arresters.
Front-of-Wave
Protective
Level (kV)*
Lightning Impulse Discharge Voltages (8/20 μ sec. kV)
10 kA
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
500 A
1000 A
2000 A
2.55
9.4
7.2
7.6
7.8
8.3
9.3
11.0
6.5
6.8
–
5.10
18.4
14.4
15.0
15.4
16.3
18.1
21.2
13.0
13.5
–
9
7.65
27.5
21.6
22.5
23.0
24.3
26.9
31.4
19.5
20.3
–
10
8.40
30.2
23.7
24.7
25.3
26.7
29.4
34.4
21.4
22.3
–
12
10.2
36.6
28.8
30.0
30.6
32.4
35.6
41.6
26.0
27.0
–
15
12.7
45.4
35.8
37.3
38.1
40.2
44.3
51.6
32.4
33.96
–
18
15.3
54.7
43.2
44.9
45.9
48.4
53.2
62.0
39.0
40.5
–
21
17.0
60.8
48.0
49.9
51.0
53.8
59.1
68.8
43.4
45.0
–
24
19.5
69.7
55.0
57.2
58.5
61.7
67.7
78.9
49.8
51.6
–
27
22.0
78.5
62.1
64.5
66.0
69.5
76.3
88.9
56.1
58.2
–
30
24.4
87.1
68.8
71.6
73.1
77.1
84.6
98.5
62.3
64.6
–
33
27.5
98.2
77.6
80.6
82.4
86.9
95.3
111
70.2
72.8
–
36
29.0
104
81.8
85.0
86.9
91.6
100
117
74.0
76.8
–
39
31.5
112
88.8
92.4
94.4
99.5
109
127
80.4
83.4
–
42
34.0
118
92.5
96.2
98.3
104
114
132
83.7
86.9
–
45
36.5
125
99.3
103
106
111
122
142
89.9
93.2
–
48
39.0
134
106
110
113
119
130
151
96.0
99.6
–
54
42.0
145
114
119
121
128
140
163
103
107
–
60
48.0
165
131
136
139
146
160
186
118
123
–
66
53.0
182
144
150
153
161
177
206
131
135
–
72
57.0
197
155
161
165
174
190
221
140
146
–
78
62.0
214
169
175
179
189
207
240
153
158
–
84
68.0
234
185
192
197
207
227
264
167
174
–
90
70.0
241
190
198
202
213
233
271
172
179
–
96
76.0
261
207
215
220
231
253
294
187
194
–
108
84.0
289
229
238
243
256
280
325
207
215
–
120
98.0
320
256
266
272
283
312
362
235
246
251
132
106
347
277
288
294
307
337
392
254
267
271
138
111
363
290
302
308
321
354
410
266
279
284
144
115
376
301
313
319
333
367
425
276
289
294
162
130
425
340
353
361
376
414
480
312
327
333
Arrester
Rating
(kV rms)
Arrester
MCOV
(kV rms)
3
6
Switching Impulse Discharge
Voltages (kV)**
168
131
428
343
356
364
379
418
483
314
329
335
172
140
458
366
380
389
405
446
517
336
352
358
180
144
471
377
391
400
417
458
531
346
362
369
192
152
497
398
413
422
440
484
561
365
382
389
198
160
523
419
435
444
463
509
590
384
402
410
204
165
540
432
448
458
478
526
608
396
415
422
216
174
568
455
473
483
503
554
641
417
437
445
228
182
596
476
495
505
527
579
671
437
458
466
240
190
620
497
516
527
549
605
700
456
478
486
* Based on a current impulse that results in a discharge voltage in 0.5 μs.
** 45-60 μs rise time current surge.
www.cooperpower.com TD235009EN-7
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Table 5. Discharge Voltages - Maximum Guaranteed Protective Characteristics for Type AZEX Surge Arresters
Arrester
Rating
(kV rms)
Arrester
MCOV (kV
rms)
3
2.55
Frontof-Wave
Protective
Level (kV)*
Switching Impulse Discharge
Voltages (kV)**
Lightning Impulse Discharge Voltages (8/20 μ sec. kV)
10 kA
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
500 A
1000 A
2000 A
9.2
7.1
7.4
7.6
8.1
9.0
11.3
6.5
6.8
7.1
6
5.10
18.0
14.1
14.7
15.1
15.9
17.6
21.2
13.0
13.6
14.0
9
7.65
26.7
21.1
22.0
22.5
23.6
26.1
31.0
19.4
20.3
20.8
10
8.40
29.3
23.2
24.1
24.7
25.9
28.6
33.9
21.3
22.3
22.8
12
10.2
35.5
28.2
29.3
30.0
31.4
34.6
40.9
25.9
27.1
27.7
15
12.7
44.1
35.1
36.4
37.3
39.0
43.0
50.6
32.2
33.7
34.4
18
15.3
53.1
42.3
44.0
44.9
47.0
51.8
60.7
38.8
40.6
41.5
21
17.0
59.0
47.0
48.9
49.9
52.2
57.5
67.3
43.1
45.2
46.1
24
19.5
67.6
53.9
56.0
57.2
59.8
65.9
77.0
49.4
51.8
52.8
27
22.0
76.2
60.8
63.1
64.5
67.4
74.2
86.6
55.8
58.4
59.6
30
24.4
84.4
67.4
70.0
71.5
74.7
82.3
95.9
61.8
64.7
66.0
33
27.5
95.1
76.0
78.9
80.6
84.2
92.7
108
69.7
73.0
74.4
36
29.0
100
80.1
83.3
85.1
88.8
97.8
114
73.5
77.0
78.5
39
31.5
109
87.0
90.4
92.4
96.4
106
123
79.8
83.6
85.2
42
34.0
111
89.0
92.5
94.5
98.6
109
126
81.6
85.5
87.2
45
36.5
120
95.5
99.2
101
106
116
135
87.6
91.8
93.6
48
39.0
128
102
106
108
113
124
145
93.6
98.1
100
54
42.0
138
110
114
117
122
134
156
101
106
108
60
48.0
157
126
130
133
139
153
178
115
121
123
66
53.0
173
139
144
147
153
169
196
127
133
136
72
57.0
186
149
155
158
165
182
211
137
143
146
78
62.0
202
162
169
172
179
198
229
149
156
159
84
68.0
223
178
185
189
197
217
251
163
171
174
90
70.0
229
183
190
194
203
223
258
168
176
179
96
76.0
249
199
206
211
220
242
280
182
191
195
108
84.0
275
220
228
233
243
268
310
202
211
215
* Based on a current impulse that results in a discharge voltage in 0.5 μs.
**45-60 μs rise time current surge.
TD235009EN-8 www.cooperpower.com
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
(3) .625" x 1.27"
(1.6 x 3.2 cm) LG. MTG.
SLOTS (120 APART)
120°
8.75"-10"(22.2 - 25.4 cm)
DIA. BOLT CIRCLE
60°
THICKNESS OF
MOUNTING FEET
IS 0.87" (2.2 cm)
“A”
DIRECTED
VENT PORT
Figure 5. Base mounting.
NNote: To develop rated cantilever strength use 10 inch bolt circle mounting
diameter and 0.5 inch hardened bolts and flat washers.
Figure 6. Dimensions of VariSTAR Type AZE cubicle-mount surge
arrester.
NNote: Refer to Table 5 for dimension “A”.
42”
(107 cm)
DIA.
6.9”
(18 cm)
42”
(107 cm)
DIA.
55”
(140 cm)
DIA.
24”
(60 cm)
24”
(60 cm)
26”
(66 cm)
DIA.
6.9”
(18 cm)
30”
(77 cm)
16”
(40 cm)
“A”
“A”
“A”
6.9”
(18 cm)
“A”
“A”
“A”
3-120 kV
132-168 kV
172-240 kV
258-288 kV
294-312 kV
330-360 kV
*FOR 172 kV ONLY
DIMENSION IS 12” (30 cm)
Figure 7. Dimensions of VariSTAR Type AZE metal-top surge arresters.
NNote: Refer to Table 4 for dimension “A”.
www.cooperpower.com TD235009EN-9
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Table 6. Catalog Numbers, Dimensional Information, Insulation Withstand Voltages and Weights for AZES Metal-Top Surge
Arresters
Arrester Arrester
Rating
MCOV
(kV, rms) (kV, rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
258
264
276
288
294
300
312
330
336
360
2.55
5.10
7.65
8.40
10.2
12.7
15.3
17.0
19.5
22.0
24.4
27.5
29.0
31.5
34.0
36.5
39.0
42.0
48.0
53.0
57.0
62.0
68.0
70.0
76.0
84.0
98.0
106
111
115
130
131
140
144
152
160
165
174
182
190
209
212
220
230
235
239
245
267
269
289
Catalog Number
AZES001G002003
AZES001G005006
AZES001G007009
AZES002G008010
AZES002G010012
AZES002G012015
AZES003G015018
AZES003G017021
AZES003G019024
AZES004G022027
AZES004G024030
AZES004G027033
AZES004G029036
AZES005G031039
AZES005G034042
AZES005G036045
AZES005G039048
AZES006G042054
AZES006G048060
AZES007G053066
AZES007G057072
AZES008G062078
AZES008G068084
AZES008G070090
AZES008G076096
AZES009G084108
AZES009G098120
AZES012G106132
AZES012G111138
AZES013G115144
AZES014G130162
AZES015G131168
AZES021G140172
AZES022G144180
AZES022G152192
AZES023G160198
AZES024G165204
AZES024G174216
AZES025G182228
AZES025G190240
AZES067G209258
AZES067G212264
AZES069G220276
AZES069G230288
AZES070G235294
AZES070G239300
AZES071G245312
AZES074G267330
AZES074G269336
AZES075G289360
Figure 7
Dim. “A”
(in.)
18.6
18.6
18.6
21.1
21.1
21.1
24.8
24.8
24.8
28.6
28.6
28.6
28.6
33.6
33.6
33.6
33.6
36.6
36.6
39.4
39.4
48.0
48.0
48.0
48.0
56.5
56.5
71.5
71.5
74.4
80.1
82.9
83.2
88.9
88.9
91.8
100.3
100.3
108.9
108.9
123.9
123.9
132.5
132.5
135.3
135.3
141.0
152.4
152.4
161.0
Figure 3 Dim.
“B” Minimum
Phase-to-Phase
Clearance (in.)
12
12
13
13
14
14
15
16
16
17
18
20
20
21
22
23
24
25
28
30
31
33
36
36
39
42
43
46
47
49
54
54
72
73
76
79
81
84
86
89
105
106
108
111
113
114
116
136
136
143
Figure 3 Dim.
“C” Minimum
Phase-toGround
Clearance (in.)
6
7
7
7
8
9
10
11
11
12
13
14
14
15
16
17
18
20
22
24
26
28
30
31
33
36
37
40
42
43
48
48
59
60
63
66
68
71
73
76
84
85
87
90
92
93
95
108
109
115
Insulation Withstand Voltages
Housing
Leakage
Distance
(in.)
9.2
9.2
9.2
16.0
16.0
16.0
26.2
26.2
26.2
36.3
36.3
36.3
36.3
49.9
49.9
49.9
49.9
64.8
64.8
73.7
73.7
100.0
100.0
100.0
100.0
127.0
127.0
138.5
138.5
147.4
164.8
173.7
173.7
191.8
191.8
200.7
227.0
227.0
254.0
254.0
265.5
265.5
291.8
291.8
300.7
300.7
318.8
354.0
354.0
381.0
Housing
Strike
Distance
(in.)
5.2
5.2
5.2
7.7
7.7
7.7
11.4
11.4
11.4
15.2
15.2
15.2
15.2
20.2
20.2
20.2
20.2
23.6
23.6
26.5
26.5
35.0
35.0
35.0
35.0
43.6
43.6
50.1
50.1
52.9
58.6
61.5
59.4
60.9
60.9
63.8
72.3
72.3
80.9
80.9
83.9
83.9
92.4
92.4
95.3
95.3
100.9
109.5
109.5
118.0
1.2/50 µs 60 Hz Dry,
Impulse
60 sec
(kV Crest) (kV, rms)
130
130
130
170
170
170
230
230
230
265
265
265
265
320
320
320
320
365
365
385
385
505
505
505
505
650
650
735
735
770
865
880
920
920
920
930
1065
1065
1185
1185
1265
1265
1300
1300
1405
1405
1475
1440
1440
1535
75
75
75
95
95
95
125
125
125
150
150
150
150
190
190
190
190
200
200
235
235
305
305
305
305
370
370
425
425
475
490
545
535
515
515
535
595
595
655
655
690
690
750
750
765
765
805
810
810
860
60 Hz Wet,
10 sec
(kV, rms)
40
40
40
65
65
65
95
95
95
125
125
125
125
165
165
165
165
170
170
200
200
260
260
260
260
300
300
360
360
400
415
455
450
440
440
480
545
545
580
580
625
625
675
675
725
725
730
790
790
840
Weight
(lbs.)
42
42
43
48
49
49
56
57
58
65
65
66
66
77
78
78
78
86
87
96
97
116
118
118
119
161
175
191
193
202
217
225
237
270
273
283
303
306
348
351
472
473
499
503
524
526
558
605
606
655
NNote: All arresters are available in grey (standard) or brown porcelain glaze. For brown glaze, substitute “B” for “G” in the eighth position of the catalog
number.
TD235009EN-10 www.cooperpower.com
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Table 7. Catalog Numbers, Dimensional Information, Insulation Withstand Voltages and Weights for AZES Cubicle-Mount Surge
Arresters
Arrester Arrester
Rating
MCOV
(kV, rms) (kV, rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
2.55
5.10
7.65
8.40
10.2
12.7
15.3
17.0
19.5
22.0
24.4
27.5
29.0
31.5
34.0
36.5
39.0
Catalog Number
AZES091G002003
AZES091G005006
AZES091G007009
AZES092G008010
AZES092G010012
AZES092G012015
AZES093G015018
AZES093G017021
AZES093G019024
AZES094G022027
AZES094G024030
AZES094G027033
AZES094G029036
AZES095G031039
AZES095G034042
AZES095G036045
AZES095G039048
Figure 7
Dim. “A”
(in.)
13.4
13.4
13.4
15.9
15.9
15.9
20.2
20.2
20.2
23.4
23.4
23.4
23.4
28.4
28.4
28.4
28.4
Figure 3 Dim.
“B” Minimum
Phase-to-Phase
Clearance (in.)
8
8
8
8
9
10
11
12
12
13
14
15
16
17
18
19
20
Figure 3 Dim.
“C” Minimum
Phase-toGround
Clearance (in.)
4
5
5
5
6
7
8
8
9
10
11
12
12
13
14
15
16
Insulation Withstand Voltages
Housing
Leakage
Distance
(in.)
9.0
9.0
9.0
16.0
16.0
16.0
26.4
26.4
26.4
36.8
36.8
36.8
36.8
50.7
50.7
50.7
50.7
Housing
Strike
Distance
(in.)
4.7
4.7
4.7
7.2
7.2
7.2
11.0
11.0
11.0
14.7
14.7
14.7
14.7
19.7
19.7
19.7
19.7
1.2/50 µs 60 Hz Dry,
Impulse
60 sec
(kV Crest) (kV, rms)
95
95
95
128
128
128
182
182
182
230
230
230
230
294
294
294
294
65
65
65
93
93
93
119
119
119
148
148
148
148
174
174
174
174
60 Hz Wet,
10 sec
(kV, rms)
32
32
32
46
46
46
75
75
75
115
115
115
115
143
143
143
143
Weight
(lbs.)
23
24
24
29
30
30
38
38
39
47
47
47
48
59
60
60
60
Note: All arresters are available in grey (standard) or brown porcelain glaze. For brown glaze, substitute “B” for “G” in the eighth position of the catalog number.
www.cooperpower.com TD235009EN-11
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Table 8. Catalog Numbers, Dimensional Information, Insulation Withstand Voltages and Weights for AZEH Metal-Top Surge
Arresters
Arrester
Rating
(kV rms)
Arrester
MCOV
(kV rms)
Catalog Number
Figure 7
Dim "A"
(in)
Figure 3 Dim.
"B" Minimum
Phase-toPhase
Clearance
(in)
Figure 3
Dim "C"
Minimum
Phase-toGround
Clearance
(in)
Insulation Withstand Voltages
Housing
Leakage
Distance
(in)
Housing
Strike
Distance
(in)
1.2/50 μs 60 Hz Dry 60 Hz Wet,
Impulse
60 sec
10 sec
Weight
(kV crest) (kV rms)
(kV rms)
(lbs)
3
2.55
AZEH001G002003
18.2
12
6
9.2
5.2
130
75
40
42
6
5.10
AZEH001G005006
18.2
12
7
9.2
5.2
130
75
40
43
9
7.65
AZEH001G007009
18.2
13
7
9.2
5.2
130
75
40
44
10
8.40
AZEH002G008010
20.7
13
7
16.0
7.7
170
95
65
49
12
10.2
AZEH002G010012
20.7
13
8
16.0
7.7
170
95
65
50
15
12.7
AZEH002G012015
20.7
14
8
16.0
7.7
170
95
65
51
18
15.3
AZEH003G015018
25.0
15
9
26.2
11.4
230
125
95
58
21
17.0
AZEH003G017021
25.0
16
10
26.2
11.4
230
125
95
59
24
19.5
AZEH003G019024
25.0
16
10
26.2
11.4
230
125
95
60
27
22.0
AZEH004G022027
28.2
17
11
36.3
15.2
265
150
125
68
30
24.4
AZEH004G024030
28.2
18
12
36.3
15.2
265
150
125
68
33
27.5
AZEH004G027033
28.2
19
13
36.3
15.2
265
150
125
69
36
29.0
AZEH004G029036
28.2
19
13
36.3
15.2
265
150
125
70
39
31.5
AZEH005G031039
33.2
20
14
49.9
20.2
320
190
165
81
42
34.0
AZEH005G034042
33.2
21
15
49.9
20.2
320
190
165
82
45
36.5
AZEH005G036045
33.2
21
16
49.9
20.2
320
190
165
83
48
39.0
AZEH005G039048
33.2
22
17
49.9
20.2
320
190
165
83
54
42.0
AZEH006G042054
36.6
23
18
64.8
23.6
365
200
170
90
60
48.0
AZEH006G048060
36.6
25
20
64.8
23.6
366
200
170
92
66
53.0
AZEH007G053066
39.4
27
21
73.8
26.5
385
235
200
102
72
57.0
AZEH007G057072
39.4
28
23
73.8
26.5
385
235
200
103
78
62.0
AZEH007G062078
48.0
30
25
100
35.0
505
305
260
123
84
68.0
AZEH008G068084
48.0
32
27
100
35.0
505
305
260
125
90
70.0
AZEH008G070090
48.0
33
27
100
35.0
505
305
260
125
96
76.0
AZEH008G076096
48.0
35
29
100
35.0
505
305
260
127
108
84.0
AZEH009G084108
56.5
38
32
127
43.6
650
370
300
170
120
98.0
AZEH049G098120
56.5
39
34
127
44.2
650
370
300
213
132
106
AZEH052G106132
71.5
42
36
139
51.3
735
425
360
244
138
111
AZEH052G111138
71.5
44
38
139
51.3
735
425
360
247
144
115
AZEH053G115144
74.4
45
39
147
54.1
770
475
400
258
162
130
AZEH054G130162
80.1
49
44
165
59.8
865
490
415
276
168
131
AZEH055G131168
83.0
50
44
174
62.7
880
545
455
289
172
140
AZEH061G140172
83.0
67
54
174
60.0
920
535
450
301
180
144
AZEH062G144180
88.6
68
55
192
61.6
920
515
440
332
192
152
AZEH062G152192
88.6
71
58
192
61.6
920
515
440
336
198
160
AZEH063G160198
91.5
73
60
201
64.4
930
535
480
349
204
165
AZEH064G165204
100
75
62
227
73.0
1065
595
545
374
216
174
AZEH064G174216
100
78
65
227
73.0
1065
595
545
378
228
182
AZEH065G182228
109
80
67
254
81.5
1285
655
580
423
240
190
AZEH065G190240
109
83
70
254
81.5
1285
655
580
426
NNote: All arresters are available in grey (standard) or brown porcelain glaze. For brown glaze, substitute "B" for "G" in the eighth position of the catalog.
TD235009EN-12 www.cooperpower.com
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Table 9. Catalog Numbers, Dimensional Information, Insulation Withstand Voltages and Weights for AZEH Cubicle Mount Surge
Arresters
Arrester
Rating
(kV rms)
Arrester
MCOV
(kV rms)
Catalog Number
Figure 6
Dim "A"
(in)
Figure 3 Dim.
"B" Minimum
Phase-toPhase
Clearance
(in)
Figure 3
Dim "C"
Minimum
Phase-toGround
Clearance
(in)
Insulation Withstand Voltages
Housing
Leakage
Distance
(in)
Housing
Strike
Distance
(in)
1.2/50 μs 60 Hz Dry 60 Hz Wet,
Impulse
60 sec
10 sec
Weight
(kV crest) (kV rms)
(kV rms)
(lbs)
3
2.55
AZEH091G002003
13.4
8
4
9.0
4.7
95
65
32
23
6
5.10
AZEH091G005006
13.4
8
5
9.0
4.7
95
65
32
24
9
7.65
AZEH091G007009
13.4
8
5
9.0
4.7
95
65
32
25
10
8.40
AZEH092G008010
15.9
8
5
16.0
7.2
128
93
46
30
12
10.2
AZEH092G010012
15.9
9
5
16.0
7.2
128
93
46
31
15
12.7
AZEH092G012015
15.9
10
6
16.0
7.2
128
93
46
32
18
15.3
AZEH093G015018
20.2
10
7
26.4
11.0
182
119
75
39
21
17.0
AZEH093G017021
20.2
11
8
26.4
11.0
182
119
75
40
24
19.5
AZEH093H019024
20.2
11
8
26.4
11.0
182
119
75
41
27
22.0
AZEH094G022027
23.4
12
9
36.8
14.7
230
148
115
49
30
24.4
AZEH094G024030
23.4
13
10
36.8
14.7
230
148
115
49
33
27.5
AZEH094G027033
23.4
14
11
36.8
14.7
230
148
115
50
36
29.0
AZEH094G029036
23.4
15
11
36.8
14.7
230
148
115
51
39
31.5
AZEH095G031039
28.4
16
12
50.7
19.7
294
174
143
63
42
34.0
AZEH095G034042
28.4
16
13
50.7
19.7
294
174
143
64
45
36.5
AZEH095G036045
28.4
17
14
50.7
19.7
294
174
143
65
48
39.0
AZEH095G039048
28.4
18
15
50.7
19.7
294
174
143
65
NNote: All arresters are available in grey (standard) or brown porcelain glaze. For brown glaze, substitute "B" for "G" in the eighth position of the catalog.
www.cooperpower.com TD235009EN-13
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Table 10. Catalog Numbers, Dimensional Information, Insulation Withstand Voltages and Weights for AZEX Metal-Top Surge
Arresters
Arrester
Rating
(kV rms)
Arrester
MCOV
(kV rms)
3
2.55
Catalog
Number
AZEX041G002003
Figure 7
Dim "A"
(in)
Figure 3
Dim. "B"
Minimum
Phaseto-Phase
Clearance
(in)
Figure 3
Dim "C"
Minimum
Phase-toGround
Clearance
(in)
18.2
12
6
Insulation Withstand Voltages
Housing
Leakage
Distance
(in)
9.2
Housing
Strike
Distance
(in)
5.7
1.2/50 μs
60 Hz Dry 60 Hz Wet,
Impulse (kV 60 sec (kV 10 sec
Weight
crest)
rms)
(kV rms)
(lbs)
130
75
40
41
6
5.10
AZEX041G005006
18.2
12
6
9.2
5.7
130
75
40
43
9
7.65
AZEX041G007009
18.2
12
7
9.2
5.7
130
75
40
44
10
8.40
AZEX042G008010
20.7
13
7
16.0
8.2
170
95
65
50
12
10.2
AZEX042G010012
20.7
13
7
16.0
8.2
170
95
65
52
15
12.7
AZEX042G012015
20.7
14
8
16.0
8.2
170
95
65
53
18
15.3
AZEX043G015018
25.0
14
9
26.2
11.9
230
125
95
63
21
17.0
AZEX043G017021
25.0
15
9
26.2
11.9
230
125
95
64
24
19.5
AZEX043G019024
25.0
15
9
26.2
11.9
230
125
95
66
27
22.0
AZEX044G022027
28.2
16
10
36.3
15.7
265
150
125
77
30
24.4
AZEX044G024030
28.2
17
11
36.3
15.7
265
150
125
77
33
27.5
AZEX044G027033
28.2
18
12
36.3
15.7
265
150
125
78
36
29.0
AZEX044G029036
28.2
18
13
36.3
15.7
265
150
125
80
39
31.5
AZEX045G031039
33.2
19
13
49.9
20.7
320
190
165
94
42
34.0
AZEX045G034042
33.2
19
14
49.9
20.7
320
190
165
96
45
36.5
AZEX045G036045
33.2
20
14
49.9
20.7
320
190
165
97
48
39.0
AZEX045G039048
33.2
21
15
49.9
20.7
320
190
165
97
54
42.0
AZEX046G042054
36.6
22
16
64.8
24.2
365
200
170
114
60
48.0
AZEX046G048060
36.6
24
18
64.8
24.2
365
200
170
116
66
53.0
AZEX047G053066
39.4
25
20
73.7
27.1
385
235
200
129
72
57.0
AZEX047G057072
39.4
27
21
73.7
27.1
385
235
200
131
78
62.0
AZEX048G062078
48.0
28
22
100
35.6
505
305
260
156
84
68.0
AZEX048G068084
48.0
30
24
100
35.6
505
305
260
158
90
70.0
AZEX048G070090
48.0
31
25
100
35.6
505
305
260
158
96
76.0
AZEX048G076096
48.0
32
27
100
35.6
505
305
260
161
108
84.0
AZEX049G084108
56.5
35
29
127
44.2
650
370
300
206
NNote: All arresters are available in grey (standard) or brown porcelain glaze. For brown glaze, substitute "B" for "G" in the eighth position of the catalog.
TD235009EN-14 www.cooperpower.com
VariSTAR Type AZE surge arrester
Technical Data TD235009EN
Effective September 2014
www.cooperpower.com TD235009EN-15
Technical Data TD235009EN
VariSTAR Type AZE surge arrester
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235009EN
TD235009EN-16
Eaton, Cooper Power Systems, and Storm
Trapper are valuable trademarks of Eaton in
the U.S. and other countries. You are not permitted to use the these trademarks without
the prior written consent of Eaton.
IEEE Std C62.11™ -1993 standard is a
trademark of the Institute of Electrical
and Electronics Engineers, Inc. (IEEE).
This publication/product is not endorsed or
approved by the IEEE.
IEEE® is a registered trademark of the Institute
of Electrical and Electronics Engineers, Inc.
For Eaton's Cooper Power
Systems VariSTAR Type
AZE surge arrester product
information call 1-877-277-4636
or visit: www.cooperpower.
com.
Technical Data TD235010EN
Effective September 2014
Supersedes 235-95 August 2011
VariSTAR™ composite light-duty
under-oil (CLU) MOV arrester
General
Eaton's Cooper Power Systems VariSTAR™
composite light-duty under-oil (CLU) MOV arrester
is designed in accordance with IEEE Std C62.11™1999 standard light-duty distribution-class
requirements. It is designed for either horizontal
or vertical mounting inside the distribution
transformer tank to eliminate the difficulties
associated with externally mounted arresters.
Construction
The unique construction of the CLU arrester
begins with world class glass-collared Metal
Oxide Varistor (MOV) disks produced at our
dedicated manufacturing facility in Olean, New
York. By manufacturing our own disks we maintain
strict quality control over the entire production
process; from initial raw material inspections to
final physical and electrical testing of each disk. In
addition, by controlling the manufacturing process
of both disks and arresters, we achieve the
optimal combination of quality and performance.
Eaton's Cooper Power Systems produces
MOV disks of unsurpassed quality through
continuous improvements in disk formulation and
manufacturing technology. The end result is a long
history of in-service reliability with outstanding
durability and protective capability.
Arrester production begins by stacking glasscollared MOV disks in series with aluminum end
electrodes. Our proprietary manufacturing process
wraps the assembly with a high-strength woven
fiberglass-reinforced epoxy composite that seals
the MOVs from the transformer fluids. When
cured the arrester module withstands the high
temperature conditions of being submersed in
an oil environment. The addition of an industry
unique isolation link to the composite wrapped
MOV module creates the only under-oil arrester
with a non-fragmenting failure mode. This design
feature has excellent over-voltage protection while
allowing transformer designers to provide less
tank clearance for the arrester because they do
not have to allow space for MOV ejection out of
the arrester body at the end of the arrester life.
Features
•
The CLU arrester design features a fail open or
fail short option. The fail open version utilizes
an isolation link as illustrated in Figure 1 on
page two. Since the isolation link is external
of the arrester components, no components
will be expelled into the transformer tank upon
operation. The time-current characteristic curve
is illustrated in Figure 3. The fail short version
does not include the isolation link and will
remain intact upon operation.
•
Rigid mounting plates for a stronger mounting
configuration.
•
The CLU arrester is compatible with mineral oil
and Envirotemp™ FR3™ fluid.
•
The fiberglass-reinforced epoxy composite acts
as a seal against all fluids; protecting the active
components within the module.
TD235010EN-1
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
Production tests
HIGH VOLTAGE LINE LEAD
Copper wire with PVC insulation
A complete production test program ensures a quality product. Each
VariSTAR metal oxide varistor receives a series of 100% electrical
tests. Quality is further ensured by a series of destructive tests
performed on every batch of varistors. Listed are the tests that are
performed on the varistors:
•
100% Physical Inspection
•
100% Discharge Voltage Test
•
100% V1mA/cm2
•
100% Leakage Current at 80% of V1mA/cm2 Voltage
•
Batch High-current Short Duration Test
•
Batch Thermal Stability Test
NON-HYGROSCOPIC HANGER
High strength, track resistant
hanger brackets.
FIBERGLASS REINFORCED
EPOXY COMPOSITE
Effectively seals
arrester from fluids
Each VariSTAR CLU arrester must pass the following production
tests:
•
100% Physical Inspection
•
100% Leakage Current Test
•
100% RIV Test
•
100% Power Loss Test at 1.05 times MCOV
MOV DISKS
Highly non-linear metal oxide
varistors provide exceptional
surge protection.
NON-HYGROSCOPIC HANGER
High strength, track resistant
hanger brackets.
GROUND LEAD
Copper wire with
PVC insulation
ISOLATION LINK
When operated the isolation
link disconnects the arrester
from the circuit.
Figure 2. Cutaway of CLU arrester.
Figure 1. Detail photographs of isolation link assembly.
Table 1. Protective Characteristics
Maximum Discharge Voltage
(kV, peak)
8/20 µs Current Wave
Switching Surge
(kV, peak)
30/60 µs Current Wave
MCOV
(kV)
Frontof-Wave
Protective
Level
(kV, crest)
1.5 kA
3 kA
5kA
10kA
20kA
40kA
125A
500A
3
2.55
10.5
8.6
9.2
9.9
10.8
12.4
14.4
7.5
8.1
6
5.1
20.9
17.1
18.5
19.8
21.6
24.7
28.7
15
16.2
9
7.65
31.5
25.8
27.8
29.8
32.6
37.2
43.2
22.6
24.3
10
8.4
33.4
27.4
29.5
31.6
34.5
39.4
45.9
24
25.8
12
10.2
42
34.4
37
39.7
43.4
49.5
57.6
30.1
32.4
15
12.7
50.8
41.6
44.8
48
52.5
59.9
69.6
36.4
39.2
18
15.3
63.1
51.6
55.6
59.6
65.1
74.4
86.5
45.2
48.7
21
17
66.9
54.7
59
63.2
69.1
78.9
91.7
48
51.6
24
19.5
77.3
63.3
68.2
73.1
79.9
91.2
106
55.5
59.7
27
22
89.8
73.5
79.2
84.9
92.8
106
123
64.4
69.4
30
24.4
97.8
80
86.2
92.4
101
115
134
70.1
75.5
33
27
111
90.9
98
105
115
131
152
79.7
85.8
36
29
117
96.1
104
111
121
139
161
84.2
90.7
Duty Cycle
Voltage
Rating
(kV)
TD235010EN-2 www.cooperpower.com
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
General application recommendations
The rating of an arrester is the power frequency line-to-ground
voltage at which the arrester is designed to pass an operating
duty-cycle test. Table 3 provides a general application guide for the
selection of the proper arrester rating for a given system voltage and
system grounding configuration.
Eaton's Cooper Power Systems application engineers are available
to make application recommendations. The following information is
normally required:
1. System maximum operating voltage.
Where unusual conditions exist (high ground resistance, high
capacitive load, arc-welding equipment, etc.) the following
supplementary information is necessary:
1. The unusual condition.
2. Type of construction, phase spacing, length of line, conductor
size.
3. BIL of equipment and line insulation.
4. Phase-sequence components of impedances on the load side of
the distribution substation.
The impedance of the transformer and the impedance and grounding
of supply to the substation all affect the voltage during faults.
2. System grounding conditions.
A. For four-wire circuits, grounding conditions depend upon
whether the system is multi-grounded, has a neutral
impedance and whether common primary and secondary
neutrals are used.
B. For three-wire circuits, grounding conditions depend upon
whether the system is solidly grounded at the source,
grounded through neutral impedance at the source
transformers, or ungrounded.
Table 2. Performance Test Characteristics
Description
Characteristics
Duty Cycle
20 current surges of 5 kA crest 8/20 µs waveshape followed by 2 current surges of 5 kA crest 8/20 µs waveshape
High Current, Short Duration Discharge
2 current surges of 40 kA crest 4/10 µs waveshape
Low Current,Long Duration Discharge
20 current surges of 75 A crest 2000 µs rectangular wave duration
Table 3. Commonly Applied Voltage Rating of the CLU Arrester
System Voltage
(kV rms)
Recommended Arrester Rating
(kV rms)
Nominal
Maximum
Four-Wire Wye;
Multi Grounded Neutral
Three-Wire Wye; Solidly
Grounded Neutral
Delta and
Ungrounded Wye
2.4
2.54
–
–
3
4.16Y/2.4
4.4Y/2.54
3
6
6
4.16
4.4
–
–
6
4.8
5.08
–
–
6
6.9
7.26
–
–
9
8.32Y/4.8
8.8Y/5.08
6
9
–
12.0Y/6.93
12.7Y/7.33
9
12
–
12.47Y/7.2
13.2Y/7.62
9
15
–
13.2Y/7.62
13.97Y/8.07
10
15
–
13.8Y/7.97
14.52Y/8.38
10
15
–
13.8
14.52
–
–
18
20.78Y/12.0
22Y/12.7
15
21
–
22.86Y/13.2
24.2Y/13.87
18
24
–
23
24.34
–
–
27
24.94Y/14.4
26.4Y/15.24
18
27
–
27.6Y/15.93
29.3Y/16.89
21
–
–
34.5Y/19.92
36.5Y/21.08
27
–
–
www.cooperpower.com TD235010EN-3
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
1500
1000
750
500
250
0
0.001
0.01
0.1
Time (seconds)
Figure 3. Time current characteristic curve of isolation link.
Figure 4. Temporary overvoltage curve of CLU arrester family.
Temporary overvoltage (TOV) capability
The Temporary overvoltage (TOV) capability of the VariSTAR CLU
arrester is shown in Figure 4.
TD235010EN-4 www.cooperpower.com
1
10
Current (Amps)
1250
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
Ordering information
To order an Eaton's Cooper Power Systems VariSTAR Type CLU
arrester, please specify the intended base unit and terminal option,
and determine the arrester rating for the intended application using
Table 3. Contact your Eaton's Cooper Power Systems representative
for applications not listed.
For further information, please reference Report Summary CP0605,
VariSTAR CLU Arrester Certified Test Report and Service Information
S235-95-1, VariSTAR CLU Arrester Installation Instructions.
Catalog number digits
Digits 1, 2, 3: Composite Light Duty Under-Oil
C
L
U
1
2
3
4
5
6
7
8
Digits 4, 5: Base Unit
10.
11.
13.
20.
21.
23.
One mounting
bracket on top
Two mounting
brackets on
top
Digit 6:
One mounting
bracket on
top;
One mounting
bracket on
bottom
Two mounting
brackets on
top;
One mounting
bracket on
bottom
One mounting
bracket on
top;
One mounting
bracket on
bottom;
Isolation link
Two mounting
brackets on
top;
One mounting
bracket on
bottom;
Isolation link
Terminal Option
A.
Line and Ground
Terminals are
#10 AWG Copper
Wire, Durometer
A85, Orange Insulation, w/Ring
Terminal
B.
Line Terminal is #10 AWG
Copper Wire, Ground Terminal is #4 AWG Copper Wire
Line and Ground Terminals
are Durometer A85, Orange
Insulation, w/Ring Terminal
C.
¼-20 Terminal
Studs (Both
Ends)
Digits 7, 8: Arrester Rating (03-36)
www.cooperpower.com TD235010EN-5
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
Table 4. CLU10A and CLU10B Dimensions
Arrester Rating
(kV rms)
A
B
A
in. (mm)
B
in. (mm)
3
3.96 (100.58)
3.11 (78.99)
6
4.87 (123.70)
4.02 (102.11)
9
5.78 (146.81)
4.93 (125.22)
10
5.78 (146.81)
4.93 (125.22)
12
6.69 (169.93)
5.84 (148.34)
15
7.14 (181.36)
6.29 (159.77)
18
8.51 (216.15)
7.66 (194.56)
21
8.51 (216.15)
7.66 (194.56)
24
9.42 (239.27)
8.57 (217.68)
27
10.78 (273.81)
9.93 (252.22)
30
11.24 (285.50)
10.39 (263.91)
33
12.60 (320.04)
11.75 (298.45)
36
12.60 (320.04)
11.75 (298.45)
Figure 5. CLU10A and CLU10B arrester.
Table 5. CLU10C Dimensions
A
B
Figure 6. CLU10C arrester.
TD235010EN-6 www.cooperpower.com
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.49 (114.05)
3.11 (78.99)
6
5.40 (137.16)
4.02 (102.11)
9
6.31 (160.27)
4.93 (125.22)
10
6.31 (160.27)
4.93 (125.22)
12
7.22 (183.39)
5.84 (148.34)
15
7.67 (194.82)
6.29 (159.77)
18
9.04 (229.62)
7.66 (194.56)
21
9.04 (229.62)
7.66 (194.56)
24
9.95 (252.53)
8.57 (217.68)
27
11.31 (287.27)
9.93 (252.22)
30
11.77 (298.96)
10.39 (263.91)
33
13.13 (333.50)
11.75 (298.45)
36
13.13 (333.50)
11.75 (298.45)
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
Table 6. CLU11A and CLU11B Dimensions
A
B
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.09 (103.89)
3.11 (78.99)
6
5.00 (127.00)
4.02 (102.11)
9
5.91 (150.11)
4.93 (125.22)
10
5.91 (150.11)
4.93 (125.22)
12
6.82 (173.23)
5.84 (148.34)
15
7.27 (184.66)
6.29 (159.77)
18
8.64 (219.46)
7.66 (194.56)
21
8.64 (219.46)
7.66 (194.56)
24
9.55 (242.57)
8.57 (217.68)
27
10.91 (277.11)
9.93 (252.22)
30
11.37 (288.80)
10.39 (263.91)
33
12.73 (323.34)
11.75 (298.45)
36
12.73 (323.34)
11.75 (298.45)
Figure 7. CLU11A and CLU11B arrester.
Table 7. CLU11C Dimensions
A
B
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.62 (117.35)
3.11 (78.99)
6
5.53 (140.46)
4.02 (102.11)
9
6.44 (163.58)
4.93 (125.22)
10
6.44 (163.58)
4.93 (125.22)
12
7.35 (186.69)
5.84 (148.34)
15
7.80 (198.12)
6.29 (159.77)
18
9.17 (232.92)
7.66 (194.56)
21
9.17 (232.92)
7.66 (194.56)
24
10.08 (256.03)
8.57 (217.68)
27
11.44 (290.58)
9.93 (252.22)
30
11.90 (302.26)
10.39 (263.91)
33
13.26 (336.80)
11.75 (298.45)
36
13.26 (336.80)
11.75 (298.45)
Figure 8. CLU11C arrester.
www.cooperpower.com TD235010EN-7
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
Table 8. CLU13A and CLU13B Dimensions
A
B
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.53 (115.06)
3.11 (78.99)
6
5.44 (138.18)
4.02 (102.11)
9
6.35 (161.29)
4.93 (125.22)
10
6.35 (161.29)
4.93 (125.22)
12
7.26 (184.40)
5.84 (148.34)
15
7.71 (195.83)
6.29 (159.77)
18
9.08 (230.63)
7.66 (194.56)
21
9.08 (230.63)
7.66 (194.56)
24
9.99 (253.75)
8.57 (217.68)
27
11.35 (288.29)
9.93 (252.22)
30
11.81 (299.97)
10.39 (263.91)
33
13.17 (334.52)
11.75 (298.45)
36
13.17 (334.52)
11.75 (298.45)
Figure 9. CLU13A and CLU13B arrester.
Table 9. CLU13C Dimensions
A
B
Figure 10. CLU13C arrester.
TD235010EN-8 www.cooperpower.com
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.62 (117.35)
3.11 (78.99)
6
5.53 (140.46)
4.02 (102.11)
9
6.44 (163.58)
4.93 (125.22)
10
6.44 (163.58)
4.93 (125.22)
12
7.35 (186.69)
5.84 (148.34)
15
7.80 (198.12)
6.29 (159.77)
18
9.17 (232.92)
7.66 (194.56)
21
9.17 (232.92)
7.66 (194.56)
24
10.08 (256.03)
8.57 (217.68)
27
11.44 (290.58)
9.93 (252.22)
30
11.90 (302.26)
10.39 (263.91)
33
13.26 (336.80)
11.75 (298.45)
36
13.26 (336.80)
11.75 (298.45)
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
Table 10. CLU20A and CLU20B Dimensions
A
B
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.09 (103.89)
3.11 (78.99)
6
5.00 (127.00)
4.02 (102.11)
9
5.91 (150.11)
4.93 (125.22)
10
5.91 (150.11)
4.93 (125.22)
12
6.82 (173.23)
5.84 (148.34)
15
7.27 (184.66)
6.29 (159.77)
18
8.64 (219.46)
7.66 (194.56)
21
8.64 (219.46)
7.66 (194.56)
24
9.55 (242.57)
8.57 (217.68)
27
10.91 (277.11)
9.93 (252.22)
30
11.37 (288.80)
10.39 (263.91)
33
12.73 (323.34)
11.75 (298.45)
36
12.73 (323.34)
11.75 (298.45)
Figure 11. CLU20A and CLU20B arrester.
Table 11. CLU20C Dimensions
A
B
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.62 (117.35)
3.11 (78.99)
6
5.53 (140.46)
4.02 (102.11)
9
6.44 (163.58)
4.93 (125.22)
10
6.44 (163.58)
4.93 (125.22)
12
7.35 (186.69)
5.84 (148.34)
15
7.80 (198.12)
6.29 (159.77)
18
9.17 (232.92)
7.66 (194.56)
21
9.17 (232.92)
7.66 (194.56)
24
10.08 (256.03)
8.57 (217.68)
27
11.44 (290.58)
9.93 (252.22)
30
11.90 (302.26)
10.39 (263.91)
33
13.26 (336.80)
11.75 (298.45)
36
13.26 (336.80)
11.75 (298.45)
Figure 12. CLU20C arrester.
www.cooperpower.com TD235010EN-9
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
Table 12. CLU21A and CLU21B Dimensions
A
B
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.22 (107.19)
3.11 (78.99)
6
5.13 (130.30)
4.02 (102.11)
9
6.04 (153.42)
4.93 (125.22)
10
6.04 (153.42)
4.93 (125.22)
12
6.95 (176.53)
5.84 (148.34)
15
7.40 (187.96)
6.29 (159.77)
18
8.77 (222.76)
7.66 (194.56)
21
8.77 (222.76)
7.66 (194.56)
24
9.68 (245.87)
8.57 (217.68)
27
11.04 (280.42)
9.93 (252.22)
30
11.50 (262.10)
10.39 (263.91)
33
12.86 (326.64)
11.75 (298.45)
36
12.86 (326.64)
11.75 (298.45)
Figure 13. CLU21A and CLU21B arrester
Table 13. CLU21C Dimensions
A
B
Figure 14. CLU21C arrester.
TD235010EN-10 www.cooperpower.com
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.75 (120.65)
3.11 (78.99)
6
5.66 (143.76)
4.02 (102.11)
9
6.57 (166.88)
4.93 (125.22)
10
6.57 (166.88)
4.93 (125.22)
12
7.48 (189.99)
5.84 (148.34)
15
7.93 (201.42)
6.29 (159.77)
18
9.30 (236.22)
7.66 (194.56)
21
9.30 (236.22)
7.66 (194.56)
24
10.21 (259.33)
8.57 (217.68)
27
11.57 (293.88)
9.93 (252.22)
30
12.03 (305.56)
10.39 (263.91)
33
13.39 (340.11)
11.75 (298.45)
36
13.39 (340.11)
11.75 (298.45)
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
Table 14. CLU23A and CLU23B Dimensions
A
B
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
4.66 (118.36)
3.11 (78.99)
6
5.57 (141.48)
4.02 (102.11)
9
6.48 (164.59)
4.93 (125.22)
10
6.48 (164.59)
4.93 (125.22)
12
7.39 (187.71)
5.84 (148.34)
15
7.84 (199.14)
6.29 (159.77)
18
9.21 (233.93)
7.66 (194.56)
21
9.21 (233.93)
7.66 (194.56)
24
10.12 (257.05)
8.57 (217.68)
27
11.48 (291.59)
9.93 (252.22)
30
11.94 (303.28)
10.39 (263.91)
33
13.30 (337.82)
11.75 (298.45)
36
13.30 (337.82)
11.75 (298.45)
Figure 15. CLU23A and CLU23B arrester.
Table 15. CLU23C Dimensions
A
B
Arrester Rating
(kV rms)
A
in. (mm)
B
in. (mm)
3
5.19 (131.83)
3.11 (78.99)
6
6.10 (154.94)
4.02 (102.11)
9
7.01 (178.05)
4.93 (125.22)
10
7.01 (178.05)
4.93 (125.22)
12
7.92 (201.17)
5.84 (148.34)
15
8.37 (212.60)
6.29 (159.77)
18
9.74 (247.40)
7.66 (194.56)
21
9.74 (247.40)
7.66 (194.56)
24
10.65 (270.51)
8.57 (217.68)
27
12.01 (305.05)
9.93 (252.22)
30
12.47 (316.74)
10.39 (263.91)
33
13.83 (351.28)
11.75 (298.45)
36
13.83 (351.28)
11.75 (298.45)
Figure 16. CLU23C arrester
www.cooperpower.com TD235010EN-11
Technical Data TD235010EN
VariSTAR composite light-duty under-oil MOV arrester
Effective September 2014
3.75
1.50
Ø .375
4 PLACES
Ø.39
2 PLACES
.75
R.06
.50
5.00
4.19
3.56
2.50
.375 X .562 SLOT
(2 PLACES)
2.00
.69
.50
.75
.75
1.34
1.34
1.50
1.50
Ø.200
2 PLACES
Figure 17. Mounting bracket dimensions.
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235010EN
TD235010EN-12
Eaton, Cooper Power Systems, and VariSTAR
are valuable trademarks of Eaton in the U.S.
and other countries. You are not permitted to
use the these trademarks without the prior
written consent of Eaton.
IEEE Std C62.11™-1999 standard is a
trademark of the Institute of Electrical
and Electronics Engineers, Inc. (IEEE).
This publication/product is not endorsed or
approved by the IEEE.
Envirotemp™ and FR3™ are licensed
trademarks of Cargill, Incorporated.
For Eaton's Cooper Power
Systems VariSTAR CLU
arrester product information
call 1-877-277-4636 or visit:
www.cooperpower.com.
Technical Data TD235011EN
Effective September 2014
Supersedes 235-99 June 2014
UltraSIL™ polymer-housed
Evolution™ (10 kA) IEEE® surge
arresters for MV systems to 36 kV
General
Eaton's Cooper Power Systems set the standard
for design, manufacturing and delivery of
polymeric distribution arresters with the UltraSIL™
polymer-housed arrester family. The UltraSIL
polymer-housed Evolution™ surge arrester
incorporates the industry recognized superior
polymer-housing material – silicone rubber.
The Evolution surge arrester uses specially
formulated and highly durable Metal Oxide
Varistors (MOVs) in combination with a proprietary
insulating ceramic ring assembly. The mating of
these two proven technologies allows Eaton's
Cooper Power Systems to offer a distribution class
arrester with riser-pole protective characteristics
and infinite TOV capability. The Evolution surge
arrester offers significant improvements in
protective characteristics and 60 Hz temporary
over voltage (TOV) capability for all common overhead and riser-pole applications.
Construction
The patented construction of the Evolution surge
arrester comprises the arrester module assembly
encapsulated in a high-strength composite matrix
insulating material. The components of the arrester
module assembly consist of Metal Oxide Varistors
(MOVs) in series with a proprietary insulating
ceramic ring assembly. The insulating ceramic
ring assembly withstands system voltage during
steady state conditions and reduces electrical
stress across the MOV disks.
The components of the arrester module assembly
are encapsulated on our fully automated assembly
line using strict quality control processes. The
composite matrix is cured to the arrester module
assembly to form a solid insulation system, which
is then inserted and bonded to the industry leading
track resistant UltraSIL polymer-housing material.
The composite-bonded module assembly provides
a secondary moisture seal underneath the primary
seal of the UltraSIL polymer-housing material.
The combinations of these technologies allow
the Evolution surge arrester to be impervious to
moisture and capable of withstanding extreme
electrical, environmental and cantilever load
conditions. The composite wrapped module
assembly used in the Evolution surge arrester
represents a quantum leap in polymer arrester
technology.
Following assembly, each arrester is subjected to
a battery of electrical tests to assure the highest
quality and in-service field performance.
TD235011EN-1
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
environments, chemical inertness, temperature
stability and other important insulating
properties. UltraSIL polymer-housing material
will not support biological growth (algae and
mildew), is non-flammable and will not support
combustion.
LINE TERMINAL
3/8 INCH STAINLESS STEEL STUD
NAMEPLATE
INFORMATION
STAINLESS STEEL TOPCAP
ALUMINUM LINE ELECTRODE
INSULATING CERAMIC RING
ASSEMBLY
BONDED SOLID INTERFACE
UltraSIL POLYMER-HOUSING
MATERIAL
METAL OXIDE VARISTOR
FIBERGLASS
REINFORCED EPOXY
COMPOSITE
OPTIONAL
INSULATING
HANGER
ALUMINUM GROUND
ELECTRODE
OPTIONAL GROUND
LEAD DISCONNECT
GROUND TERMINAL
3/8 INCH STAINLESS STEEL STUD
KV RATING
LABEL
(Visible from ground)
An optional insulated mounting hanger is
available to allow connecting to a wide variety of
brackets. The insulated hanger, made of glassfilled polyester, has been designed to provide
needed mechanical strength for installation and
severe loading conditions.
A ground lead isolator is also available. The
isolator removes the ground terminal from the
arrester in the unlikely event of arrester failure,
thus preventing a permanent system fault. An
isolator that has operated gives visual indication
of internal damage to the arrester and the need
for arrester replacement. See Figure 2 for the
isolator operating characteristics.
An optional universal wildlife protector has two
self-adjusting "valve" style openings which vary
from 0 to 0.75" in diameter, thus allowing for a
large variety of conductor/insulation sizes while
providing optimum wildlife protection. (See page
12, Figure 8 for a dimensional diagram.)
Customers looking to improve system reliability
by minimizing wildlife related outages now have
multiple options. In addition to the universal
wildlife protector, Eaton's Cooper Power Systems
also offers the more robust line terminal wildlife
guard. The line terminal wildlife guard is easily
retrofitted to existing arrester installations and
provides increased electrical insulation for the high
voltage terminal of the arrester. The flexible design
of the line terminal wildlife guard allows insertion
of the lead wire through the bottom of the integral
molded flanges. The access holes molded above
the flanges will allow conductor sizes ranging
from 0 to 0.50" in diameter (OD). The line terminal
wildlife guard's geometry allows water to shed
away from the surface area of the animal guard
while minimizing ice buildup and maintaining
flexibility through extreme operating temperatures.
See Figure 9 for a dimensional diagram.
For complete wildlife resistance, the ground
terminal wildlife guard can easily be installed
alongside the line terminal wildlife guard or
Figure 1. Cutaway illustration of the Evolution Distribution Surge Arrester.
universal wildlife protector. The ground terminal
wildlife guard is a compact and economical
guard that ensures wildlife is unable to come
in contact with energized objects while on a
Features
grounded surface. See Figure 10 for a dimensional diagram.
The Evolution surge arrester exceeds protective levels offered by
standard metal oxide varistor arresters and helps compensate
Operation
for two variables related to installation practices and equipment
The operation of Evolution surge arresters differs from conventional
protection:
metal oxide arresters. During steady-state conditions, the insulating
Excessive Lead Length
ceramic ring assembly withstands system voltage while reducing
electrical stress on the MOV disks. When surges occur, the insulating
Aged Equipment Insulation
ceramic ring assembly sparks over, leaving only the MOV disks in
UltraSIL polymer-housing material has undergone a wide range
the circuit. The result is much lower discharge voltages as compared
of design tests to determine the optimum shed configuration. In
to standard heavy duty and riser pole metal oxide arresters. The
addition, long term environmental testing has verified the lifetime
added insulating ceramic ring assembly extends TOV capability for
superiority of silicone rubber when compared to other polymeric
levels up to 1.78 P/U forever. Improving the Evolution surge arrester's
insulating materials.
resistance to overvoltage conditions reduces system maintenance
Independent laboratory tests have verified the superiority of polymer- related to arresters and helps improve system reliability.
housing material in terms of non-wetting surfaces, resistance to
UV degradation and surface tracking, performance in contaminated
TD235011EN-2 www.cooperpower.com
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
Design testing
Production tests
The housing material, internals and hardware work together as a
system and must stand up to years of exposure to environmental
extremes. To assure a superior level of performance, both the
components and assembled arrester units have been subjected to
a program of testing that accurately simulates years of exposure to
actual field conditions. Testing includes:
A complete production test program ensures a quality product. Each
metal oxide varistor receives a series of electrical tests. Quality is
demonstrated by a series of destructive tests performed on every
batch of varistors. Listed are the production tests performed on the
varistors:
IEEE Std C62.11™ standard testing – Full certification to
performance requirements by an independent laboratory. Reference
CP0804, UltraSIL Polymer-Housed Evolution Surge Arrester Certified
Test Report for details. Additional reference documents are listed on
page 14.
To demonstrate the resistance of a composite wrapped module to
moisture ingress Eaton's Cooper Power Systems performed the
Water Immersion Test on the Evolution surge arrester without the
polymer-housing material. This test was completed in accordance
with IEEE Std C62.11™-2005 standard, Section 8.22, and
IEC 60099-4, Ed 2 2004. The arrester sample passed the test
by demonstrating less than 5% change in residual voltage, less
than 20% change in power loss, less than 10pC of internal partial
discharge with no signs of physical damage. A test report is available
upon request.
•
100% Physical Inspection
•
100% Discharge Voltage test
•
100% V1mA/cm2
•
100% Leakage Current at 80% of V1mA/cm2 Voltage
•
Batch High-current, Short-duration test
•
Batch Thermal Stability test
•
Batch Aging test
Each fully assembled arrester must pass the following production
tests:
•
100% Physical Inspection
•
100% Partial Discharge Inception Voltage test
•
100% 60 Hz Sparkover Level test
Table 1. Commonly Applied Voltage Ratings of Evolution Surge Arresters
Recommended Arrester Rating per IEEE Std C62.22™ standard
(kV rms)
System Voltage
(kV rms)
Nominal
Maximum
Four-Wire Wye Multi-Grounded
Neutral
Three-Wire Wye Solidly Grounded
Neutral
Delta and Ungrounded Wye
Standard MOV
Arrester
Standard MOV
Arrester
Standard MOV
Arrester
URT
*URT
*URT
2.4
2.54
—
—
—
—
3
3
4.16Y/2.4
4.4Y/2.54
3
3
6
3
6
3
4.16
4.4
—
—
—
—
6
3
4.8
5.08
—
—
—
—
6
6
6.9
7.26
—
—
—
—
9
6
8.32Y/4.8
8.8Y/5.08
6
6
9
6
—
—
12.0Y/6.93
12.7Y/7.33
9
9
12
9/10
—
—
12.47Y/7.2
13.2Y/7.62
9
9
15
9/10
—
—
13.2Y/7.62
13.97Y/8.07
10
10
15
10
—
—
13.8Y/7.97
14.52Y/8.38
10
10
15
10
––
—
13.8
14.52
—
—
—
—
18
10
20.78Y/12.0
22Y/12.7
15
15
21
15
—
—
22.86Y/13.2
24.2Y/13.87
18
18
24
18
—
—
23
24.34
—
—
—
—
30
18
24.94Y/14.4
26.4Y/15.24
18
18
27
18
—
—
27.6Y/15.93
29.3Y/16.89
21
21
30
21
—
—
34.5Y/19.92
36.5Y/21.08
27
27
36
27
—
27
46Y/26.6
48.3Y/28
36
36
—
—
—
—
* Recommended arrester ratings for the Evolution arrester for 3-Wire Solidly Grounded Neutral, Delta and Ungrounded Wye circuits are based upon 5% regulation error.
www.cooperpower.com TD235011EN-3
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
General application recommendations
Fault current withstand tests
The rating of an arrester is the maximum power frequency lineto-ground voltage at which the arrester is designed to pass an
operating duty-cycle test. Table 1 provides a general application guide
for the selection of the proper arrester rating for a given system
voltage and system grounding configuration as outlined in the IEEE
Std C62.22™ standard application guide.
Fault current withstand tests demonstrate the ability to withstand
fault currents for specific durations without expelling any internal
components. All Evolution distribution class surge arrester designs
have been tested in accordance with the requirements listed in IEEE
Std C62.11™ standard, and are non-fragmenting to the levels shown
in Table 2.
Under fault conditions and other system anomalies, higher voltages
can be experienced by the arrester. To ensure that the arrester
ratings will not be exceeded, Eaton's Cooper Power Systems
application engineers are available to make recommendations. The
following information is normally required:
1. System maximum operating voltage.
2. System grounding conditions.
Table 2. Fault Current Withstand Tests
Fault Current Amplitude
(kA rms)
Fault Current Duration
(cycles)
0.6
60
20.0
12
A. For four-wire circuits, grounding conditions depend upon
whether the system is multi-grounded, whether it has
a neutral impedance and whether common primary and
secondary neutrals are used.
Consult your Eaton's Cooper Power Systems representative to have
your individual system application needs studied.
Performance test characteristics
Evolution distribution class surge arresters withstand the following
design tests as described by IEEE Std C62.11™ standard:
•
Duty Cycle:
22 current surges of 10 kA crest, 8/20 µs waveshape.
•
High-Current, Short-Duration Discharge:
2 current surges of 100 kA crest, 4/10 µs waveshape.
•
Low-Current, Long-Duration Discharge:
20 current surges of 250 A crest 2000 µs duration rectangular
wave.
Following each of these tests, the arresters remain thermally stable
as verified by:
•
Continually decreasing power values during a thirty minute power monitoring period.
•
No evidence of physical or electrical deterioration.
•
The 10 kA discharge voltages measured after each test changed
less then 10% from the initial values.
In addition, full IEEE Std C62.11™ standard certification has been
completed and verified.
TD235011EN-4 www.cooperpower.com
10.0
IGNITION TIME (SECONDS)
B. For three-wire circuits, grounding conditions depend upon
whether the system is solidly grounded at the source,
grounded through neutral impedance at the source
transformers or ungrounded.
1.0
0.1
0.01
10
100
1000
10000
ARRESTER FAULT CURRENT (A rms)
Figure 2. Isolator operating characteristic.
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
Table 3. Insulation Withstand Characteristics of Optional Insulated Mounting Bracket
Insulated Mounting
Bracket
Bracket Mounting
Length Center-to-Center
(in)
Leakage Distance
(in)
Power Frequency
Voltage Withstand
(60 sec, Wet, kV)
Strike
(in)
1.2/50 μs Impulse
(kV Crest)
Standard For Rating 3-10 kV
4.1
5.9
2.8
36
70
Standard For Rating 12-36 kV
5
8.9
3.9
48
80
Dimensions and clearances
Outline drawings for several common design options are shown in
Figures 3-6. Dimensions for these designs are listed in Table 3.
0"-4"
DIAMETER= 3.45”
4.12"-5.15"
A
MOUNTING
HOLE FOR
1/2" HARDWARE
2.56"
A
0.56"
1.7"
1.75"
B
Figure 3. Evolution surge arrester with isolator and insulated
hanger.
1.75"
0.56"
B
Figure 4. Evolution surge arrester with isolator, insulated hanger
and NEMA cross-arm bracket.
www.cooperpower.com TD235011EN-5
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
LINE TERMINAL
C
A
MOUNTING
HOLE FOR
1/2" HARDWARE
1.75"
B
B
Figure 6. Evolution surge arrester without isolator including
insulated hanger and NEMA cross-arm bracket.
D
GROUND STRAP
Figure 5. Evolution surge arrester with isolator, insulated hanger and transformer mounting bracket.
Table 4. Dimensional Data – Evolution Surge Arresters
Minimum Recommended
Clearances* (in.)
Dimensions
Figures 3-6
(Inches)
Arrester
Rating
(kV rms)
Standard
Housing
Code
(Digits 6 & 7,
Table 8)
A+
B
C+
D
Phase-toGround
Phase-toPhase
3
6
9
10
12
15
18
21
24
27
30
33
36
04
05
05
05
07
07
08
09
10
11
12
13
14
7.9
9.0
9.0
9.0
11.1
11.1
12.2
13.2
14.3
15.3
16.4
17.5
18.5
4.1
4.1
4.1
4.1
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
6.5
7.6
7.6
7.6
9.7
9.7
10.8
11.8
12.9
13.9
15.0
16.1
17.1
8.7
8.7
8.7
8.7
8.7
8.7
8.7
8.7
8.7
14.3
14.3
14.3
14.3
3.00
4.00
5.25
5.25
6.00
6.75
9.25
9.25
10.75
10.75
10.75
12.75
12.75
4.25
5.50
7.00
7.00
7.75
8.75
11.25
11.25
13.25
13.25
13.25
16.25
16.25
Heavy Duty
* All clearances are measured from center line of arrester per IEEE Std C62.22™ standard.
+ With optional Wildlife Protector add 0.2 inches.
TD235011EN-6 www.cooperpower.com
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
Insulation characteristics
The insulation characteristics of the Evolution surge arrester family
are shown in Table 5.
TABLE 5. Housing Insulation Withstand Voltages of Evolution Surge Arresters
Arrester
Mounting
Configuration
4.1"
5.0"
5.0"
4.1"
Arrester
Housing
Creep
Code
Distance Strike
(Digits 6 & 7)
(in.) (in.)
1.2/50 µs 1 min.
Impulse Dry
(kV
(kV
crest)
rms)
10 sec.
Wet
(kV
rms)
1.2/50
µs
Impulse
(kV
crest)
1 min.
Dry
(kV
rms)
10 sec.
Wet
(kV
rms)
1.2/50 µs 1 min. 10 sec.
1 min.
Impulse Dry
Wet
1.2/50 µs Dry
10 sec. 1.2/50 µs
(kV
(kV
(kV
Impulse (kV
Wet
Impulse
crest)
rms) rms)
(kV crest) rms)
(kV rms) (kV crest)
1 min.
Dry
10 sec.
(kV
Wet
rms)
(kV rms)
04
05
06
07
08
09
10
11
12
13
14
15
16
17
91
104
117
129
140
152
164
176
189
201
215
228
242
255
36
45
57
68
79
89
100
110
120
130
140
150
158
169
105
117
126
137
148
159
171
183
195
207
220
233
246
259
55
63
86
96
106
116
126
135
144
153
161
170
178
185
39
52
59
71
83
94
105
116
127
137
147
157
167
176
79
89
93
98
104
110
117
125
133
142
152
162
173
185
51
62
72
81
89
98
106
114
122
130
138
146
154
161
10.1
13.0
15.9
18.8
21.7
24.6
27.5
30.4
33.3
36.2
39.1
42.0
44.9
47.8
4.2
5.2
6.3
7.3
8.4
9.4
10.5
11.5
12.6
13.6
14.7
15.8
16.8
17.8
56
64
78
87
96
105
114
123
131
139
148
155
183
171
52
55
61
62
65
68
72
77
82
88
94
101
109
117
34
44
58
59
61
63
67
71
75
81
87
93
101
109
99
109
119
122
126
130
136
142
149
158
167
177
187
199
56
60
80
81
82
83
86
90
94
99
105
112
120
128
39
52
59
63
67
72
78
83
89
96
102
109
117
125
82
90
97
107
118
129
140
152
164
177
190
204
218
233
33
46
56
69
81
93
105
116
126
136
145
153
162
169
Protective characteristics
Evolution distribution class surge arresters provide excellent
overvoltage protection for electrical equipment throughout
distribution systems. The protective characteristics of the Evolution
surge arrester are shown in Table 6.
Table 6. Protective Characteristics – Evolution Surge Arrester Heavy Duty (URT)
Arrester
Rating
(kV rms)
MCOV
(kV rms)
Minimum 60
Hz Sparkover
(kV crest/­√2)
Front-of-wave
Protective Level*
(kV crest)
3rd Party
Front-ofWave
Protective
Level** (kV
crest)
3
6
9
10
12
15
18
21
24
27
30
33
36
2.55
5.10
7.65
8.40
10.2
12.7
15.3
17.0
19.5
22.0
24.4
27.0
29.0
4.54
9.08
13.6
15.0
18.2
22.6
27.2
30.3
34.7
39.2
43.4
48.1
51.6
20.0
23.0
32.4
32.4
52.4
55.4
64.8
64.8
87.8
97.2
117.2
120.2
129.6
—
—
—
24.3
—
—
51.1
—
—
66.9
—
—
—
Maximum Discharge Voltage (kV crest)
8/20 µs Current Wave
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
Switching
Surge
kV Crest)
500 A
8.1
16.1
18.9
20.1
25.2
30.5
37.8
40.1
46.4
53.9
58.6
66.6
70.4
11.6
23.3
27.3
29.0
36.4
44.0
54.6
57.9
67.0
78
85
96
102
13.5
27.0
31.6
33.7
42.2
51.1
63.4
67.2
78
90
98
112
118
7.6
15.2
17.8
19.0
23.8
28.8
35.7
37.8
43.8
50.8
55.3
62.8
66.4
8.7
17.4
20.3
21.6
27.2
32.8
40.8
43.2
50.0
58.0
63.2
71.7
76
9.3
18.6
21.8
23.2
29.1
35.2
43.7
46.3
53.6
62.2
67.7
77
81
10.2
20.3
23.8
25.4
31.8
38.5
47.8
50.6
58.6
68.0
74
84
89
* The Front-of-Wave Protective Level is the larger of the Front-of-Wave Sparkover Voltage (FOW) or Equivalent Front-of-Wave Discharge Voltage (EFOW) per IEEE Std. C62.11-2005 standard. The Frontof-Wave Sparkover Level is based on a voltage waveform having a rate of rise of 100 kV/µs for each 12 kV of arrester duty cycle rating. The EFOW is a discharge voltage resulting from a 10 kA current
impulse cresting in 0.5µs. The Front-of-Wave Protective Level for the Evolution arrester is the FOW Sparkover Level.
**The 3rd Party test report is available on the Cooper Power Systems website as CP1012 and includes test data for standard production 10 kV, 18 kV & 27 kV arresters.
www.cooperpower.com TD235011EN-7
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
UltraSIL Housed EVOLUTION Arrester
TOV Curve Per ANSI C62.11
2.000
Voltage (per unit of MCOV)
1.900
1.800
1.780
1.780
1.780
1.780
1.780
1.780
1.780
1.780
1.700
1.600
1.500
1.400
1.300
1.200
1.100
1.000
0.01
0.1
1
10
100
1000
10000
100000
Time Duration in Seconds
Figure 7. Temporary overvoltage curve. No prior duty – 60° C
ambient.
Ordering information
Temporary overvoltage (TOV) capability
Eaton's Cooper Power Systems Evolution surge arresters can be
ordered in a variety of customer defined options. Table 7 below lists
standard part numbers for our most common design options (see
illustrations on pages 5-6, Figures 3-6). For other design options,
use Table 8 to customize the arrester to specific needs. For further
options contact your Eaton's Cooper Power Systems sales engineer.
The ability to withstand 60 Hz overvoltage conditions [Temporary
Overvoltage (TOV)] is shown in Figure 7 for all Evolution distributionclass surge arresters. The graph shows for a given voltage
magnitude (on a Per Unit of MCOV basis) the time an arrester can
survive a TOV condition without going into thermal runaway.
Table 7. Catalog Numbers-Evolution Distribution Class Surge Arresters
Arrester
Rating
(kV rms)
With Isolator and
Insulated Hanger
(Figure 3)
With Isolator,
Insulated Hanger
and NEMA
Cross-Arm Bracket
(Figure 4)
With Isolator,
Insulated Hanger
and Transformer
Mounting Bracket
(Figure 5)
With Insulating Hanger
Without Isolator (Figure 6)
3
URT03040A1A1A1A
URT03040A1A1B1A
URT03040A1C1C1C
URT03040A0A1A1A
6
URT06050A1A1A1A
URT06050A1A1B1A
URT06050A1C1C1C
URT06050A0A1A1A
9
URT09050A1A1A1A
URT09050A1A1B1A
URT09050A1C1C1C
URT09050A0A1A1A
10
URT10050A1A1A1A
URT10050A1A1B1A
URT10050A1C1C1C
URT10050A0A1A1A
12
URT12070A1A1A1A
URT12070A1A1B1A
URT12070A1C1C1C
URT12070A0A1A1A
15
URT15070A1A1A1A
URT15070A1A1B1A
URT15070A1C1C1C
URT15070A0A1A1A
18
URT18080A1A1A1A
URT18080A1A1B1A
URT18080A1C1C1C
URT18080A0A1A1A
21
URT21090A1A1A1A
URT21090A1A1B1A
URT21090A1C1C1C
URT21090A0A1A1A
24
URT24100A1A1A1A
URT24100A1A1B1A
URT24100A1C1C1C
URT24100A0A1A1A
27
URT27110A1A1A1A
URT27110A1A1B1A
URT27110A1C1C1C
URT27110A0A1A1A
30
URT30120A1A1A1A
URT30120A1A1B1A
URT30120A1C1C1C
URT30120A0A1A1A
33
URT33130A1A1A1A
URT33130A1A1B1A
URT33130A1C1C1C
URT33130A0A1A1A
36
URT36140A1A1A1A
URT36140A1A1B1A
URT33130A1C1C1C
URT36140A0A1A1A
NNote: Digits 2 & 3 Options "RT" replaces Normal-Duty, Heavy-Duty & Riser-Pole.
NNote: All catalog numbers listed above include a universal wildlife protector; catalog number AV346X1.
TD235011EN-8 www.cooperpower.com
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
Table 8. UltraSIL Polymer-Housed Evolution Distribution-Class Surge Arrester UltraQUIK Catalog Numbering System
1 2 345 67
U
R
T
Catalog Number Digits:
1 = UltraSIL Polymer-Housed Arrester:
2 & 3 = Arrester Class: 4 & 5 = Arrester Rating (MCOV):
10
89
12
11
13
14
15
U
RT = Evolution
03 = 3 kV (2.55 kV)
06 = 6 kV (5.1 kV)
09 = 9 kV (7.65 kV)
10 = 10 kV (8.4 kV)
12 = 12 kV (10.2 kV)
15 = 15 kV (12.7 kV)
18 = 18 kV (15.3 kV)
21 = 21 kV (17.0 kV)
24 = 24 kV (19.5 kV)
27 = 27 kV (22.0 kV)
30 = 30 kV (24.4 kV)
33 = 33 kV (27.0 kV)
36 = 36 kV (29.0 kV)
6 & 7 = Housing Code per Arrester Rating: Select from Table below.
 = Standard Creepage Housing O = Optional Creepage Housings
Digits 6 & 7
Creep Length
04
05
06
07
08
09
10
11
12
13
14
15
16
17
10.1"
13.0"
15.9"
18.8"
21.7"
24.6"
27.5"
30.4"
33.3"
36.2"
39.1"
42.0"
44.9"
47.8"

O
O
O
Arrester Rating
(kV rms)
3

6
9

O
O
O
10

O
O
O
12

O
O
O
15

O
O
O
18

21
24
O
O
O
O

O
O
O

27
30
O
O
O
O
O

O
O
O

O
O
O
O

O
O
O
O

O
O
O
33
36
O
8 = Line Terminal Wire: 0 = No Line Terminal Wire
1 = 12", #6 AWG Insulated Wire,
4 = 18", #6 AWG Insulated Wire,
Stripped 1.25" both ends
Stripped 1.25" both ends
7 = 30", #6 AWG Insulated Wire,
Stripped 1.25" both ends
2 = 12", #6 AWG Insulated Wire, 1 ring terminal /1 end stripped 1.25"
5 = 18", #6 AWG Insulated Wire, 1 ring terminal /1 end stripped 1.25"
8 = 30", #6 AWG Insulated Wire,
1 ring terminal /1 end stripped 1.25"
3 = 12", #6 AWG Insulated Wire, 2 ring terminals
6 = 18", #6 AWG Insulated Wire, 2 ring terminals
9 = 30", #6 AWG Insulated Wire,
2 ring terminals
9 = Line Terminal Options
A = Silicon Bronze Nut,
Stainless Steel Wire Clamp
& Universal Wildlife
Protector. Reference Figure
7 for dimensional
information.
B = Silicon Bronze Nut
& Stainless Steel Wire
Clamp
C = No Hardware
D = Silicon Bronze Nut,
Lock Washer, Flat
Washer & Universal
Wildlife Protector (For
leads with ring terminals)
Reference Figure 7 for
dimensional information.
K = Silicon Bronze
Nut, Stainless Steel
Wire Clamp
X = Silicon Bronze Nut, Stainless
Steel Wire Clamp and
CooperGuard. Reference Figure
8 for dimensional information.
www.cooperpower.com TD235011EN-9
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
Table 8. UltraSIL Polymer-Housed Evolution Distribution-Class Surge Arrester UltraQUIK Catalog Numbering System (continued)
1 2 345 67
U
R
T
10 = Isolator, with 3/8" stainless steel grounding stud
0 = No Isolator 2 = Red Isolator 1 = Black Isolator (Standard)
3 = Yellow Isolator 89
10
11
4 = Blue Isolator 5 = White Isolator 12
13
14
15
6 = Orange Isolator
11 = Ground Terminal Options
A = Stainless Steel Wire Clamp
with Silicon Bronze Nut (Shown
with optional Isolator and
Insulated Hanger)
B = No Hardware (Shown with
optional Isolator and Insulated
Hanger)
C = Copper Transformer
Grounding Strap with Stainless
Steel Lock Washer & Silicon
Bronze Nut (Shown with optional
Isolator and Insulated Hanger)
D = Stainless Steel Washer, Lock
Washer, Silicon Bronze Nut
12 = Base Configuration Options
0 = Insulated Base
(Base Mounted Arrester)
1 = Insulated Hanger (Required with optional
isolator)
(Available only if Digits 6 & 7 are Housing
Options 15 or less*)
* For more information, contact your Eaton's
Cooper Power Systems representative.
2 = Insulated Base With Conductive Mounting
Strap
(Requires "D" in Digit 11)
13 = Mounting Bracket Options
A = Without an Additional
Mounting Bracket
TD235011EN-10 www.cooperpower.com
B = NEMA® Cross-Arm Bracket
(Arrester Mounting Hardware
Included)
(Requires "1" or "2" in Digit 12)
(Refer to Figure 11 for dimensional
information.)
C = Transformer Bracket (Arrester
Mounting Hardware Included)
(Requires "1" or "2" in Digit 12)
(Refer to Figures 12 and 13 for
dimensions by rating.)
D = Option C plus Transformer
Mounting Hardware
(2 each – 1/2", 13-UNC x 3/4"
Bolts, Flat Washers, and Lock
Washers)
(Requires "1" or "2" in Digit 12)
(Refer to Figures 12 and 13 for
dimensions by rating.)
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
Table 8. UltraSIL Polymer-Housed Evolution Distribution-Class Surge Arrester UltraQUIK Catalog Numbering System (continued)
1 2 345 67
U
R
T
89
10
11
12
13
14
15
12 & 13 = Double Digit Mounting Options with Ground Terminal Wildlife Guard
E8 = Ground Terminal Wildlife Guard, Insulated Hanger
(Shown with optional isolator), NEMA® cross-arm bracket
(Arrester Mounting Hardware Included)
Refer to Figures 10 and 11 for dimensional information
E9 = Ground Terminal Wildlife Guard, Insulated Hanger
(Shown with optional isolator), transformer bracket. Reference Figures 10, 12, and 13
for dimensional information.
14 = Nameplate Information: 1 = IEEE Std C62.11™ standard Required Data
15 = Packaging: A = Individual Carton (Assembled Terminal Hardware). Each arrester is shipped in an individual high strength cardboard carton. The top and bottom terminal hardware is assembled to the arrester. Any optional brackets or hardware are
provided unassembled.
C = Bulk Packed (Assembled Terminal Hardware). Pallet sized bulk cardboard packaging for transformer mounting bracket options (Digits 13 = C or D only). Each arrester is shipped fully assembled including transformer mounting bracket.
Available for 3-24 kV arresters only. Full pallet quantities only: 3-10 kV = 90, 12-18 kV = 72, 21-24 kV = 40.
3 = International, Individual Carton (Assembled Terminal Hardware). Each arrester with accessories is shipped in an individual
cardboard carton. The top and bottom terminal hardware is assembled to the arrester. Individual cartons are packed within a
heavy duty quadwall carton having a skid bottom and suitable for double stacking within an ocean shipping container.
www.cooperpower.com TD235011EN-11
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
Available accessories for the Evolution
surge arrester
VALVE
OPENING
0.80"
VALVE
OPENING
2.22"
152
1.03"
2.50"
VALVE
OPENING
SIDE VIEW
TOP VIEW
Figure 8. Universal wildlife protector (catalog number AV346X1C).
The optional universal wildlife protector has two self-adjusting "valve" style openngs which vary from 0 to 0.75"
in diameter, thus allowing for a large variety of conductor/insulation sizes while providing optimum wildlife
protection.
7.82
ø .475
2.938
2.08
1.95
1.65
ø 3.78
Figure 9. Line terminal wildlife guard (catalog number AV698X1C). (All dimensions in inches.)
Figure 10. Ground terminal wildlife guard (catalog number AV731X1C). (All dimensions in inches.) Left
shows attachment of ground terminal wildlife guard, right images shows ground terminal wildlife guard
completely installed.
TD235011EN-12 www.cooperpower.com
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
ZERO
To
4.00
1.25
3.00”
1.50”
.75”
.344
45°
6.75
.438
SQUARE
4.50
4.12
To
5.15
.56”
1/2" HARDWARE
2.13”
2.56
.438 SQUARE
HOLE
3.40”
.500
1.50
3/8" HARDWARE
2.13”
14.25”
12.55”
2.50”
Figure 11. NEMA® cross-arm bracket (catalog number AM35A1).
Can be specified with a "B" in digit 13. (All dimensions in
inches.)
2.13”
3.38”
1.25"
.75"
2.38"
.25"
2.13”
1.86”
1"
Figure 13. Standard transformer mounting bracket for 27-36 kV
arrester (catalog number AH46A2). Can be specified with a “C”
in Digit 13. (All dimensions in inches.)
50
2.38"
8.70"
5.70"
1"
2.25"
2.5"
2.25"
1.63"
40
Figure 12. Standard transformer mounting bracket for 3-24 kV
arrester (catalog number AM36A2). Can be specified with a “C”
in Digit 13. (All dimensions in inches.)
.56 x 2.25"
MTG. SLOTS
(2 REQ'D)
12.25"
7"
2.5"
1.63"
0.5"
1.25"
Figure 14. Optional transformer mounting bracket (catalog
number AM36A3). Can be specified with an “N” in Digit 13. (All
dimensions in inches.)
www.cooperpower.com TD235011EN-13
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
2.38"
170
1"
13
114
9
32
40
11 SQUARE
HOLE
11 SQUARE
.56 x 2.25"
MTG. SLOTS
(2 REQ'D)
11"
8
13
7"
2.5"
1.63"
0.5"
Figure 16. Conductive base mounting for use with 3/8"
hardware. Can be specified with a "2" in digit 12. (Requires "0"
in digit 10, "D" in digit 11.) (All dimensions in inches.)
170
1.5"
Figure 15. Optional transformer mounting bracket (catalog
number AM36A1). Can be specified with an “S” in Digit 13. (All
dimensions in inches.)
13
114
32
(2) 13 mm O
Additional information
•
S235-35-1, UltraSIL Housed Distribution-Class MOV Arrester
Installation Instructions
•
B235-08033, Taking Protection to the Extremes, The Evolution
Surge Arrester
•
B235-08022, Superior Protection for Arresters and Wildlife
•
CP0804, UltraSIL Polymer-Housed Evolution Surge Arrester
Certified Test Report
•
CP1012, UltraSIL Polymer-Housed Evolution Surge Arrester Design
Test
TD235011EN-14 www.cooperpower.com
8
13
UltraSIL polymer-housed Evolution surge arresters
Technical Data TD235011EN
Effective September 2014
www.cooperpower.com TD235011EN-15
Technical Data TD235011EN
UltraSIL polymer-housed Evolution surge arresters
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235011EN
TD235011EN-16
Eaton, Cooper Power Systems, VariSTAR,
UltraSIL, Evolution, and UltraQUIK are valuable
trademarks of Eaton in the U.S. and other
countries. You are not permitted to use the
these trademarks without the prior written
consent of Eaton.
IEEE Std C62.11™-2005 and Std C62.22™
standards are trademarks of the Institute of
Electrical and Electronics Engineers, Inc.,
(IEEE). This publication is not endorsed or
approved by the IEEE.
IEEE® is a registered trademark of the
Institute of Electrical and Electronics
Engineers, Inc.
For Eaton’s Cooper Power
Systems Evolution surge
arrester product information
call 1-877-277-4636 or visit:
www.cooperpower.com.
Technical Data TD235012EN
Effective September 2014
Supersedes 235-102 March 2014
UltraSIL™ polymer-housed VariSTAR™
Type UI intermediate-class surge arresters
General
Eaton's Cooper Power Systems has set a new
standard of excellence for polymer-housed
intermediate-class surge arresters. The UltraSIL™
Polymer-Housed VariSTAR™ Type UI IntermediateClass Arresters incorporate the industry recognized
superior silicone rubber housing with a unique
high creep alternating shed profile designed to
withstand the most extreme environments. The
"standard" silicone rubber housing is designed
with a minimum specific creepage distance of 31
mm/kV L-L, which meets category IV (Very Heavy)
pollution level according to the IEC standard. This
housing is applied over a gapless MOV internal
design.
Type UI arresters from Eaton's Cooper Power
Systems meet or exceed the requirements of
IEEE Std C62.11™-2005 standard including Short
Circuit Tests performed in accordance with IEEE
Std C62.11a™-2008 standard.
TD235012EN-1
Technical Data TD235012EN
Type UI intermediate-class surge arresters
Effective September 2014
Table 1. UltraSIL (UI) Intermediate-Class
Ratings and Characteristics
UltraSIL SILICONE
RUBBER HOUSING
FIBERGLASS REINFORCED
EPOXY COMPOSITE
MOV DISKS
Arrester Characteristic
Rating
Arrester Voltage Ratings (kV)
3-108
Rated Discharge Energy
(kJ/kV of MCOV)
Single Impulse Rating
3.9
System Frequency (Hz)
50/60
Impulse Classifying
Current (kA)
10
High Current withstand* (kA)
100
Pressure Relief Rating,**
kA rms sym.
40
Cantilever Strength (in-Ibs)
ALUMINUM
ELECTRODES
UI (3-108 kV)
BONDED SOLID
INTERFACE
Ultimate
MDCL
Static†
10,000
4,000
* High current, short duration withstand within one minute (100 kA,
4/10 µs).
**Cubicle Mount Pressure Relief Rating is 40 kA rms sym.
† Maximum design cantilever load-static or maximum working load is
40% of the ultimate.
ALUMINUM ALLOY
MOUNTING BASE
STAINLESS STEEL
NAMEPLATE
Figure 1. Cutaway illustration of 10 kV UltraSIL Housed VariSTAR Intermediate-Class
Arrester.
Construction
The unique construction of UltraSIL Polymer-Housed IntermediateClass Arresters begins with world class Metal Oxide Varistor (MOV)
disks produced at our dedicated manufacturing facility in Olean,
NY. By manufacturing our own disks we maintain a strict quality
control over the entire pro­duction process, from initial raw material
inspections to final physical and electrical testing of each disk. In
addition, by controlling the manufacturing process of both disks
and arresters, we achieve the optimal combination. Eaton's Cooper
Power Systems produces MOV disks of unsurpassed quality through
continuous improvements in disk formulation and manufacturing
technology. The end result is a long history of in-service use with
outstanding durability and protective capability.
Arrester production begins by stacking glass-collared MOV disks
in series with aluminum end electrodes. Our proprietary process
wraps the assembly with a high-strength woven fiberglass-reinforced
epoxy composite. When cured, the arrester module is capable of
withstanding extreme electrical and cantilever loading conditions.
The UltraSIL silicone rubber housing utilizes an inter­ference fit and
is bonded onto the internal module to form a solid, void free, highdielectric strength insulation system. Once the housing is in place,
each arrester must pass a strict series of electrical tests to insure the
highest level of in-service performance.
The silicone rubber housing results in lighter weight than similarly
rated porcelain housed arresters. The silicone rubber housing is also
less sensitive to physical damage than porcelain.
Features
The UltraSIL silicone rubber housing was selected for its superior
insula­tion performance when compared to other polymeric housing
TD235012EN-2 www.cooperpower.com
materials. Long term environmental testing has verified the lifetime
performance advantage silicone rubber provides.
Independent laboratory tests have verified the superior water repellent
behavior of silicone rubber, which is responsible for the lower external
power losses, higher resistance to UV degradation and surface tracking,
superior performance in contaminated environments, and other important
insulating properties. Also, UltraSIL silicone rubber has been proven not
to support biological growth and is non-flammable.
The standard silicone rubber housed arrester can be customized with
a variety of terminal and mounting options which allow users to select
the features that meet their application needs. Eaton's Cooper Power
Systems provides high creep silicone rubber housings for standard
arrester designs equivalent to 31 mm/kV or 1.22"/kV. Customers who
require longer creepage housings can easily select a different housing
option through the catalog numbering system. See pages 6-7 for a
complete list of available options.
Operation
The operation of the VariSTAR Type UI Intermediate-Class Arrester
is typical of gapless metal oxide arresters. During steady-state
conditions, line-to-ground voltage is applied con­tinuously between
the line and ground terminals of the arrester. When surges occur, the
arrester immediately limits, or clamps, the overvoltage condition by
conducting the surge current to ground. After passage of the surge,
the arrester returns to its initial state, conducting minimal leakage
current. This minimal leakage current (which is primarily capacitive,
with a small resistive component) can be tolerated on a continuing
basis.
The UltraSIL Polymer-Housed Intermediate-Class Type UI
Arrester easily surpasses the minimum fault current withstand
requirements for intermediate-class arresters as defined in IEEE
Technical Data TD235012EN
Type UI intermediate-class surge arresters
Effective September 2014
Std C62.11a™-2008 standard (16.1 kA). These arresters have been
tested and shown to withstand fault currents exceeding 40 kA.
During these tests, the silicone rubber housing ruptures without
expelling internal parts.
Type UI arresters are ideal for protection against repeated high
energy switching surges and provide reliable protection for
substation equipment, capacitor banks, multiple lines, and cable
circuits. They are also ideal for applications where lighter weight and
shorter heights (when compared to porcelain housed arresters) are
critical.
Design testing
The housing, internal components, and hardware of an arrester must
work together as a system. This system must stand up to years of
service while being subjected to a wide range of environmental and
electrical stresses. To assure a superior level of performance, both
arrester components and finished arresters have been subjected
to a series of tests that accurately represents years of exposure to
actual field conditions. This testing far exceeds the requirements of
industry standards.
The Type UI arrester has also met or exceeded all requirements for
Intermediate-Class arresters as defined by IEEE Std C62.11™-2005
standard. A certified test report is available upon request. For a copy,
please order Eaton's Cooper Power Systems document CP1121.
Production tests
Eaton's Cooper Power Systems has implemented a complete
production test program to ensure a quality product. Each MOV disk
is subjected to a series of electrical tests to maintain quality. We
also perform additional tests on every MOV disk batch. Listed below
are the tests performed on the MOV disks:
Table 2. Recommended Arrester Applications for VariSTAR
Intermediate-Class Arresters
System Voltage
(kV rms)
Recommended Arrester Rating (MCOV)
kV rms
Nominal
Maximum
Three-Wire or Four-Wire Wye
Solidly Grounded Neutral
2.4
4.16
4.8
6.9
2.52
4.37
5.04
7.25
3 (2.55)
3 (2.55)
–
6 (5.10)
8.32
8.74
6 (5.10)
12.0
12.7
12.47
13.2
13.2
13.97
13.8
14.5
20.78
21.8
22.9
24.2
24.9
26.4
34.5
36.5
46
48.3
69
72
9 (7.65)
10 (8.40)
9 (7.65)
10 (8.40)
10 (8.40)
12 (10.2)
10 (8.40)
12 (10.2)
15 (12.7)
21 (17.0)
18 (15.3)
21 (17.0)
18 (15.3)
21 (17.0)
27 (22.0)
30 (24.4)
36 (29.0)
39 (31.5)
54 (42.0)
60 (48.0)
90 (70.0)
96 (76.0)
108 (84.0)
•
100% Physical Inspection
115
121
•
100% Discharge Voltage Test
138
145
•
100% Vref at 6 mA
•
100% Watt Loss Measured at 1.05 x MCOV
•
100% Transmission Line Discharge Energy Test
•
Batch High-Current, Short-Duration Test
•
Batch Thermal Stability Test
•
Batch Aging Test
•
100% Physical Inspection
•
100% Vref Test
•
100% Watt Loss Test
•
100% Partial Discharge Inception Voltage Test
General application recommendations
The rating of an arrester is the maximum power-frequency lineto-ground voltage at which the arrester is designed to pass an
operating duty-cycle test (as defined in IEEE Std C62.11™-2005
standard). Table 2 provides a general application guide for the
selection of the proper arrester rating for a given system voltage
and grounding configurations as outlined in IEEE Std C62.22™2009 standard, which is the application guide for metal oxide surge
arresters.
Under fault conditions and other system anomalies, higher than
normal voltages can be imposed upon an arrester. With an improper
arrester selection, these abnormal system voltages can cause an
arrester to fail. To help ensure that the proper arrester is selected,
Eaton's Cooper Power Systems application engineers are available to
make recommendations.
3 (2.55)
6 (5.10)
6 (5.10)
9 (7.65)
9 (7.65)
10 (8.40)
12 (10.2)
15 (12.7)
15 (12.7)
18 (15.3)
15 (12.7)
–
15 (12.7)
18 (15.3)
24 (19.5)
27 (22.0)
24 (19.5)
–
24 (19.5)
27 (22.0)
36 (29.0)
39 (31.5)
48 (39.0)
–
72 (57.0)
–
108 (84.0)
–
–
1.600
1.500 1.486
1.427
1.417
1.400
1.358
Voltage (per unit COV)
Each fully assembled UltraSIL Housed Intermediate-Class Arrester
also must pass the following production tests:
Delta and
Ungrounded
Wye
1.300
No Prior Duty
1.348
1.289
1.279
1.220
1.200
1.210
Prior Duty
1.151
1.141
1.100
1.000
1.082
0.1
1
10
100
1000
10000
Time (sec)
Figure 2. Temporary overvoltage curve – 60° ambient
temperature.
Note:The TOV curve in Figure 2 applies to standard electrical build arresters.
Consult manufacturer for further information regarding alternate electrical
builds.
The following information is normally required:
1. Maximum system operating voltage.
2. System grounding conditions;
A. For four-wire circuits, grounding conditions depend upon
whether the system is multi-grounded, whether it has a
neutral impedance and whether common primary and
secondary neutrals are used.
www.cooperpower.com TD235012EN-3
Technical Data TD235012EN
Type UI intermediate-class surge arresters
Effective September 2014
B. For three-wire circuits, grounding conditions depend upon
whether the system is solidly grounded at the source,
grounded through neutral impedance at the source
transformers or ungrounded.
B
C
C
B
3. Available Fault Current.
4. Maximum line-to-ground voltage and overvoltage duration during
fault conditions.
Contact your Eaton's Cooper Power Systems representative to have
your individual system application needs reviewed.
Temporary overvoltage (TOV) withstand
ability
The UltraSIL Polymer-Housed Intermediate-Class arrester's ability to
withstand 60 Hz overvoltage conditions (TOVs) is shown in Figure 2.
The graph illustrates the time an arrester can survive such a voltage,
and recover, without going into thermal runaway for a given voltage
magnitude (expressed in Per Units of arrester MCOV).
The graphs in Figure 2 show TOV withstand ability, with and without
prior duty. The prior duty curve is based upon absorption of rated
energy immediately preceding application of the overvoltage which is
3.9 kJ/kV of MCOV.
Dimensions, weight and spacing
requirements
Figure 3 illustrates a three-phase in-line mounting arrangement.
Dimen­sions B and C reference mini­mum phase-to-ground and
phase-to-phase distances respectively. These dimensions are listed
in Table 3. Figure 4 shows an outline drawing of the standard
UltraSIL housed Type UI Intermediate-Class arrester. The referenced
di­mension for all kV ratings are listed in Table 3. This table also
includes the insulation withstand characteristics and weights for the
Type UI arrester family.
B
Figure 3. Three-phase in-line mounting arrangement.
Ordering information
Table 3 includes the standard catalog numbers for Type UI arresters.
The arrester represented by the standard catalog number is
configured with the connectors and mounting arrangement shown in
Figure 4 (“31” in digits 11 and 12 of Table 5). Eaton's Cooper Power
Systems offers many other options that allow customers to select
specific features they desire. Options on housing sizes, hardware
and mounting options are available and defined in Table 5. This table
allows customers who may prefer options different from those in
our standard Figure 4 configuration to develop a catalog number
which provides the unique features they desire. For additional
assistance please contact your Eaton's Cooper Power Systems sales
representative.
Protective characteristics
All UltraSIL Polymer-Housed Intermediate-Class Arresters provide
excellent overvoltage protection for electrical equipment. The
specific protective characteristics for each arrester rating are shown
on the next page in Table 4.
3.62
3.62
1.57
.75
1.57
.75
Figure 4. Outline drawing of standard UltraSIL Polymer-Housed Intermediate-Class Arresters (for standard catalog numbers see
Table 3).
TD235012EN-4 www.cooperpower.com
Technical Data TD235012EN
Type UI intermediate-class surge arresters
Effective September 2014
Table 3. Catalog Numbers, Dimensions, Weights, Spacing Requirements and Insulation Withstand Levels of UltraSIL PolymerHoused Intermediate-Class Arrester (Standard Configuration)
Insulation Withstand Voltages
Arrester
Rating
(kV, rms)
Arrester
MCOV
(kV, rms)
Figure 4
Dim. "A"
(Inches)
Weight
(lbs.)
Figure 3 Dim. "B"
Minimum
Phase-to-Ground
Clearances (Inches)
Figure 3 Dim. "C"
Minimum Phase-toPhase
Clearances
(Inches)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17.0
19.5
22.0
24.4
27.5
29.0
31.5
34.0
36.5
39.0
42.0
48.0
53.0
57.0
62.0
68.0
72.0
76.0
84.0
6.3
6.3
7.9
7.9
7.9
7.9
9.4
9.4
11.0
12.5
12.5
14.1
14.1
15.6
15.6
17.1
18.7
18.7
21.8
21.8
23.4
28.2
29.7
31.2
32.8
35.9
11
11
11
11
11
11
13.2
13.2
13.2
15.4
15.4
15.4
15.4
15.4
15.4
17.6
17.6
17.6
19.8
19.8
19.8
24.3
24.3
24.3
24.3
28.7
5.5
5.5
5.9
6.1
6.6
7.5
8.6
8.5
9.5
10.5
11.5
12.7
13.3
14.3
15.2
16.2
17.2
18.4
20.8
22.7
24.3
26.3
28.7
30.2
31.8
35
10
10
10.4
10.6
11.1
12
13.1
13.1
14
15
16
17.2
17.8
18.8
19.7
20.7
21.7
22.9
25.3
27.2
28.8
30.8
33.2
34.7
36.3
39.5
Creepage
Distance
(Inches)
1.2/50
Impulse
(kV, Crest)
60 Hz, dry
60 Seconds
(kV, rms)
61 Hz, wet
10 Seconds
(kV, rms)
23
23
30.7
30.7
30.7
30.7
38.4
38.4
46.1
53.7
53.7
61.4
61.4
69.1
69.1
76.8
84.4
84.4
99.8
99.8
107.5
130.5
138.2
145.9
153.5
168.9
86
86
115
115
115
115
134
134
155
176
176
201
201
217
217
237
252
252
294
294
316
418
434
454
474
504
60
60
80
80
80
80
94
94
109
123
123
140
140
151
151
164
172
172
201
201
212
291
302
315
328
344
48
48
64
64
64
64
75
75
88
101
101
113
113
126
126
139
152
152
173
173
187
239
252
265
278
304
Table 4. Protective Characteristics of the UltraSIL Polymer-Housed Intermediate-Class Arrester Type UI
Arrester
Rating
(kV, rms)
Arrester
MCOV
(kV, rms)
TOV*
1 Sec
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17.0
19.5
22.0
24.4
27.5
29.0
31.5
34.0
36.5
39.0
42.0
48.0
53.0
57.0
62.0
68.0
72.0
76.0
84.0
3.5
6.9
10.4
11.4
13.9
17.2
20.8
23.1
26.5
29.9
33.1
37.3
39.4
42.8
46.2
49.6
53.0
57.0
65.2
72.0
77.4
84.2
92.3
97.8
103.2
114.1
10 Sec
Front-of-Wave
Protective Level**
(kV Crest)
Maximum Discharge Voltage (kV Crest)
8/20us Current Wave***
1.5kA
3kA
5kA
10kA
20kA
40kA
Switching Surge
Protective Level****
(kV Crest)
500A
3.3
6.6
9.9
10.8
13.1
16.4
19.7
21.9
25.1
28.4
31.5
35.4
37.4
40.6
43.8
47.0
50.3
54.1
61.9
68.3
73.5
79.9
87.7
92.8
98.0
108.3
8.8
17.5
26.2
28.8
34.9
43.5
52.4
58.2
66.7
75.3
83.5
94.1
99.2
108
117
125
134
144
165
182
195
213
233
247
260
288
6.8
13.6
20.4
22.4
27.2
33.8
40.8
45.3
51.9
58.6
65
73.2
77.2
83.9
90.5
97.2
104
112
128
142
152
165
181
192
203
224
9.1
18.2
27.3
29.9
36.3
45.2
54.5
60.5
69.4
78.3
86.8
97.9
104
113
121
130
139
150
171
189
203
221
242
257
271
299
10.4
20.7
31.1
34.1
41.4
51.5
62.1
69
79.1
89.2
98.9
112
118
128
138
148
159
171
195
215
232
252
276
292
309
341
6.3
12.5
18.8
20.6
25
31.1
37.5
41.6
47.8
53.9
59.8
67.3
71
77.1
83.2
89.4
95.5
103
118
130
140
152
167
177
186
206
7.2
14.4
21.6
23.7
28.8
35.8
43.1
47.9
55
62
68.8
77.5
81.7
88.8
95.8
103
110
119
136
150
161
175
192
203
215
237
7.6
15.2
22.7
24.9
30.3
37.7
45.4
50.4
57.8
65.2
72.3
81.5
86
93.4
101
109
116
125
143
158
169
184
202
214
226
249
8.3
16.6
24.9
27.3
33.1
41.3
49.7
55.2
63.3
71.4
79.2
89.3
94.2
103
111
119
127
137
156
172
185
202
221
234
247
273
* Temporary Overvoltage (TOV) with Prior Duty.
** Based on a 10 kA current impulse that results in a discharge voltage cresting in 0.5 µs
*** Contact manufacturer for alternate electrical builds.
**** 45-60 µs rise time for a 500 A peak current surge.
www.cooperpower.com TD235012EN-5
Technical Data TD235012EN
Type UI intermediate-class surge arresters
Effective September 2014
Table 5. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed Intermediate-Class Arresters
1
U
2
I
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Catalog Number Digits:
1 = “U” (UltraSIL Polymer-Housed Arrester)
2 = “I” (Intermediate-Class Arrester)
3 = "A" Standard Electrical Build*
* Consult manufacturer for further information regarding alternate electrical builds.
4 = "A" Standard Cantilever Strength Design
5 through 10 = Arrester Rating: Duty-cycle (MCOV)
003002 = 3 kV (2.55 kV)
027022 = 27 kV (22.0 kV)
060048 = 60 kV (48.0 kV)
006005 = 6 kV (5.1 kV)
030024 = 30 kV (24.4 kV)
066053 = 66 kV (53.0 kV)
009007 = 9 kV (7.65 kV)
033027 = 33 kV (27.0 kV)
072057 = 72 kV (57.0 kV)
010008 = 10 kV (8.4 kV)
036029 = 36 kV (29.0 kV)
078062 = 78 kV (62.0 kV)
012010 = 12 kV (10.2 kV)
039031 = 39 kV (31.5 kV)
084068 = 84 kV (68.0 kV)
015012 = 15 kV (12.7 kV)
042034 = 42 kV (34.0 kV)
090072 = 90 kV (72.0 kV)
018015 = 18 kV (15.3 kV)
045036 = 45 kV (36.5 kV)
096076 = 96 kV (76.0 kV)
021017 = 21 kV (17.0 kV)
048039 = 48 kV (39.0 kV)
108084 = 108 kV (84.0 kV)
024019 = 24 kV (19.5 kV)
054042 = 54 kV (42.0 kV)
11 = "A" Standard
TD235012EN-6 www.cooperpower.com
17
18
Technical Data TD235012EN
Type UI intermediate-class surge arresters
Effective September 2014
Table 5. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed Intermediate-Class Arresters (continued)
1
U
2
I
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
12 and 13 = Housing Code (Select from Table below): Please contact your Eaton's Cooper Power Systems Sales Representative for further information regarding available housing codes.
Arrester Rating
(kV rms)
Standard
Housing Code
Maximum Housing Code (Extra
Creepage)
3
06
08
6
06
08
9
08
10
10
08
10
Housing Code
Creepage
(in.)
12
08
12
06
23.0
15
08
14
08
30.7
18
10
14
10
38.4
21
10
16
12
46.1
53.7
Housing Code Creep Distances in Inches
24
12
18
14
27
14
18
16
61.4
69.1
30
14
20
18
33
16
22
20
76.8
84.4
36
16
22
22
39
18
24
24
92.1
42
18
26
26
99.8
45
20
28
28
115.2
48
22
28
34
130.5
138.2
54
22
28
36
60
26
28
38
145.9
153.5
66
26
28
40
72
28
28
44
168.9
176.6
78
34
46
46
84
36
50
48
184.3
90
38
50
50
192.0
96
40
52
52
199.7
108
44
56
54
207.4
56
215.1
www.cooperpower.com TD235012EN-7
Technical Data TD235012EN
Type UI intermediate-class surge arresters
Effective September 2014
Table 5. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed Intermediate-Class Arresters (continued)
1
U
2
I
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
14 = Line Terminal Options
3.6" (91 mm)
3.6" (91 mm)
3.6" (91 mm)
1 = Eyebolt Connector
3 = Clamp Style Connector
4 = NEMA Four-hole Pad
Accepts copper or aluminum
Accepts copper or aluminum Accepts copper or aluminum
conductors from .16" dia. (#6) to conductors from .16" dia. (#6)
conductors from .16" dia. (#6)
.575" dia. (250 MCM)
to .82" dia. (500 MCM)
to .82" dia. (500 MCM) (Standard Option)
1.18" (30 mm)
5 = Wire Clamp
Accepts copper or aluminum
conductors from .16" dia. (#6) to .575"
dia. (250 MCM) (Cubicle Mount)
15 = Ground Terminal Options
2.5" (64 mm)
3.6" (91 mm)
1.18" (30 mm)
1 = Clamp Style Connector
Accepts copper or aluminum
conductors from .16" dia. (#6)
to .575" dia. (250 MCM) 5 = NEMA Four-hole Pad
Accepts copper or aluminum
conductors from .16" dia. (#6)
to .82" dia. (500 MCM)
(Standard Option)
B = Wire Clamp
Accepts copper or aluminum
conductors from .16" dia. (#6)
to .575" dia. (250 MCM)
(Cubicle Mount)
16 = Mounting Arrangement
A = Mounting Base Located on Bottom
(Standard Option)
B = No Mounting Base
(Cubicle Mount) (UI Type 3-36 kV)
17 = “1” – Nameplate for Standard or Suspension Mount
“2” – Nameplate for Cubicle Mount (3-36 kV) Option Code "B" for digit 16.
18 = “1” Packaging
TD235012EN-8 www.cooperpower.com
C = Mounting Base Located on Top (Suspension Mount)
Technical Data TD235012EN
Type UI intermediate-class surge arresters
Effective September 2014
Nameplate information
A stainless steel nameplate is at­tached to the base of every UltraSIL
Polymer-Housed Type UI Arrester. The arrester catalog number, serial
number, year of manufacture, duty-cycle ratings, MCOV ratings,
and pressure relief rating are among the details provided on the
nameplate. For cubicle mount arresters, the information is etched
in the top plate of the arrester. See Figure 5 for an example of a blank
nameplate.
Mounting information
The standard base of the UltraSIL Polymer-Housed Type UI Arrester
is designed for mounting on 8.75" or 10" diameter bolt circle patterns.
The three mounting holes are each spaced 120° from the others
and are designed to handle 0.5" diameter bolts. Mounting hardware
(bolts, nuts, and washers) is not in­cluded with the arrester. See Figure
6 for mounting base details.
The UltraSIL Polymer-Housed Type UI Arrester has an ultimate
cantilever strength rating of 10,000 in-lbs. An inherently strong design
allows the UltraSIL arrester to be mounted in a variety of ways. These
arresters can be mounted ver­tically, with attachment at the base,
suspension (underhung) mounted or cubicle mounted. In order to
underhang the arrester the proper ori­entation of the mounting base
is required. UltraSIL Polymer-Housed Intermediate-Class Type UI
Arresters can also be horizontally mounted through 108 kV. Please
select the proper mounting arrangement option in the catalog
number as shown in Table 5. Contact your local Eaton's Cooper
Power Systems representative for further mounting configuration
details.
Figure 5. Detail of blank nameplate.
120° TYPICAL
(3) 0.56" x 1.18"
MOUNTING SLOTS
8.75" –
10.00" DIA.
BOLT
CIRCLE
Additional Information
•
S235-102-1, UltraSIL Polymer-Housed VariSTAR Type UI
Intermediate-Class Surge Arresters Installation Instructions
•
CP1121, UltraSIL Polymer-Housed VariSTAR Type UI IntermediateClass Surge Arresters Certified Test Report
ARRESTER HOUSING
DIAMETER - 4.16"
THICKNESS OF
MOUNTING
FEET IS 0.75"
Figure 6. Mounting base details.
www.cooperpower.com TD235012EN-9
Technical Data TD235012EN
Effective September 2014
TD235012EN-10 www.cooperpower.com
Type UI intermediate-class surge arresters
Type UI intermediate-class surge arresters
Technical Data TD235012EN
Effective September 2014
www.cooperpower.com TD235012EN-11
Technical Data TD235012EN
Type UI intermediate-class surge arresters
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235012EN
TD235012EN-12
Eaton, Cooper Power Systems, VariSTAR and
UltraSIL are valuable trademarks of Eaton
in the U.S. and other countries. You are not
permitted to use these trademarks without
the prior written consent of Eaton.
IEEE is a registered trademark of the Institute of
Electrical and Electronics Engineers, Inc.
IEEE Std C62.11™-2005, IEEE Std C62.22™2009 and IEEE Std 62.11a™-2008 standards
are trademarks of the Institute of Electrical
and Electronics Engineers, Inc., (IEEE).
This publication/product is not endorsed or
approved by the IEEE.
For Eaton's Cooper Power
Systems surge arrester
product information call
1-877-277-4636 or visit:
www.cooperpower.com.
Technical Data TD235013EN
Effective September 2014
Supersedes 235-103 January 2014
UltraSIL™ polymer-housed VariSTAR™
station-class surge arresters
General
Eaton’s Cooper Power Systems has set a new standard of excellence
for polymer-housed station-class surge arresters. Enhancements in
arrester design allow Eaton’s Cooper Power Systems to offer increased
cantilever strength and improved energy handling capability. The
UltraSIL™ Polymer-Housed VariSTAR™ Type US, UH, and UX StationClass Arresters incorporate the industry recognized superior silicone
rubber housing with a unique high creep alternating shed profile
designed to withstand the most extreme environments. The “standard”
silicone rubber housing is designed with a minimum specific creepage
distance of 31 mm/kV L-L, which meets category IV (Very Heavy)
pollution level according to the IEC standard. This housing is applied over
a gapless MOV internal design.
Eaton’s Cooper Power Systems type US, UH, and UX arresters meet
or exceed the requirements of IEEE Std C62.11™-2005 standard
including Short Circuit Tests performed in accordance with IEEE Std
C62.11a™-2008 standard.
TD235013EN-1
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
1” STUD (UH, UX, and US outside of
exceptions below)
M12 STUD (US Cubicle Mount ≤ 60 kV
M20 STUD (US Base Mount ≤ 108 kV
UltraSIL SILICONE
RUBBER HOUSING
ALUMINUM
ELECTRODE
FIBERGLASS
REINFORCED EPOXY
COMPOSITE
MOV DISKS
ALUMINUM
ELECTRODE
Table 1. UltraSIL (US, UH, and
UX) Station- Class Ratings and
Characteristics
Arrester Characteristic
Rating
Arrester Voltage Ratings (kV)
3-240
Single
Impulse
Rating
3.9
6.2
Rated Discharge Energy
(kJ/kV of MCOV)
US (3-108 kV)
UH (3-108 kV)
US (120-240 kV)
UX (3-108 kV)
UH (120-240 kV)
System Frequency (Hz)
Impulse Classifying
Current (kA)
High Current
Withstand* (kA)
Pressure Relief Rating
(kA rms sym.)
Cantilever Strength (in-Ibs)
ALUMINUM ALLOY
MOUNTING BASE
STAINLESS STEEL
NAMEPLATE
US (3-108 kV)
UH (3-108 kV)
US (120-240 kV)
UX (3-108 kV)
UH (120-240 kV)
10
50/60
10
100
63
Ultimate MDCLStatic**
15,000
6,000
20,000
8,000
35,000
14,000
* High current, short duration withstand (100 kA, 4/10 µs)
**Maximum design cantilever load — static or maximum working
load is 40% of the ultimate.
Figure 1. Illustration of 10 kV UltraSIL Polymer-Housed VariSTAR Station-Class
Arrester.
Construction
Features
The unique construction of UltraSIL Polymer-Housed Type US, UH,
and UX Station-Class Arresters begins with world class Metal Oxide
Varistor (MOV) disks produced at our dedicated manufacturing
facility in Olean, NY. By manufacturing our own disks we maintain
a strict quality control over the entire pro­duction process, from
initial raw material inspection to final physical and electrical testing
of each disk. In addition, by controlling the manufacturing process
of both disks and arresters, we achieve the optimal combination.
Eaton’s Cooper Power Systems produces MOV disks of unsurpassed
quality through continuous improvements in disk formulation
and manufacturing technology. The end result is a long history of
in-service use with outstanding durability and protective capability.
The UltraSIL silicone rubber housing was selected for its superior
insula­tion performance as compared to other polymeric housing
materials. Long term environmental testing has verified the lifetime
performance advantage that silicone rubber provides.
Arrester production begins by stacking glass-collared MOV disks in
series with aluminum end electrodes. Our proprietary process wraps
the assembly with a woven fiberglass-reinforced epoxy composite.
When cured, the arrester module is capable of withstanding heavy
electrical and cantilever load conditions.
The UltraSIL silicone rubber housing utilizes an inter­ference fit and
is bonded onto the internal module to form a solid, void-free, highdielectric strength insulation system. Once assembled, each arrester
must pass a strict series of electrical tests to insure the highest level
of in-service performance.
The silicone rubber housing results in lighter weight than similarly
rated porcelain-housed arresters. The silicone rubber housing is less
sensitive to physical damage than porcelain. Also, when compared
to other polymeric housing materials, silicone rubber generates
significantly lower external power losses under contaminated
conditions.
Independent laboratory tests have verified the superior water
repellent behavior of silicone rubber, which is responsible for the
lower external power losses, higher resistance to UV degradation
and surface tracking, superior performance in contaminated
environments, and other important insulating properties. Also,
UltraSIL silicone rubber has been proven to be non-flammable and
self-extinguishing per UL 94V0 standards.
The basic silicone rubber-housed arrester can be customized with
a variety of terminal and mounting options which allow users to
select the features that meet their application needs. Customers
who require longer creepage housings can easily select a different
housing option through the catalog numbering system. See pages
14-15 for a complete list of available options.
Operation
The operation of the UltraSIL Polymer-Housed Type US, UH, and UX
Arrester is typical of gapless metal oxide arresters. During steadystate conditions, line-to-ground voltage is applied con­tinuously
between the line and ground terminals of the arrester. When surges
occur, the arrester immediately limits, or clamps, the overvoltage
condition by conducting the surge current to ground. After passage
of the surge, the arrester returns to its initial state, conducting
minimal leakage current. This minimal leakage current (which is
primarily capacitive, with a small resistive component) can be
withstood on a continuing basis.
The UltraSIL Polymer-Housed Type US, UH, and UX Arresters
easily surpass the minimum fault current withstand requirements
for station-class arresters as defined in IEEE Std C62.11a™-2008
standard (40 kA). These arresters have been tested and shown to
withstand fault currents of 63 kA. During these tests, the silicone
TD235013EN-2 www.cooperpower.com
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
rubber housing ruptures without expelling internal parts.
UltraSIL Polymer-Housed Type US, UH, and UX Arresters are ideal
for protection against repeated high energy switching surges and
provide reliable protection for substation equipment, capacitor banks,
multiple lines, and cable circuits. They are also ideal for applications
where lighter weight and shorter heights (when compared to
porcelain-housed arresters) are critical.
Design testing
The housing, internal components, and hardware of an arrester must
work together as a system. This system must stand up to years of
service while being subjected to a wide range of environmental and
electrical stresses. To ensure a superior level of performance, both
arrester components and finished arresters have been subjected
to a series of tests that accurately represents years of exposure to
actual field conditions. This testing far exceeds the requirements of
industry standards.
Table 2. Recommended Arrester Applications for VariSTAR
Station-Class Arresters
System Voltage
(kV rms)
Recommended Arrester Rating (MCOV)
kV rms
Nominal
Maximum
Three-Wire or
Four-Wire Wye
Solidly Grounded
Neutral
2.4
4.16
4.8
6.9
2.52
4.37
5.04
7.25
3 (2.55)
3 (2.55)
—
6 (5.10)
8.32
8.74
6 (5.10)
12.0
12.6
12.47
13.1
13.2
13.9
13.8
14.5
9 (7.65)
10 (8.40)
9 (7.65)
10 (8.40)
10 (8.40)
12 (10.2)
10 (8.40)
12 (10.2)
15 (12.7)
21 (17.0)
18 (15.3)
21 (17.0)
18 (15.3)
21 (17.0)
27 (22.0)
30 (24.4)
36 (29.0)
39 (31.5)
54 (42.0)
60 (48.0)
90 (70.0)
96 (76.0)
108 (84.0)
120 (98.0)
120 (98.0)
132 (106)
144 (115)
3 (2.55)
6 (5.10)
6 (5.10)
9 (7.65)
9 (7.65)
10 (8.40)
12 (10.2)
15 (12.7)
15 (12.7)
18 (15.3)
15 (12.7)
—
15 (12.7)
18 (15.3)
24 (19.5)
27 (22.0)
24 (19.5)
27 (22.0)
24 (19.5)
27 (22.0)
36 (29.0)
39 (31.5)
48 (39.0)
—
72 (57.0)
—
108 (84.0)
—
132 (106)
144 (115)
144 (115)
168 (131)
—
172 (140)
180 (144)
192 (152)
228 (180)
240 (190)
—
The UltraSIL Polymer-Housed Arrester has also met or exceeded
all require­ments for station-class arresters as defined by IEEE Std
C62.11™-2005 standard. A certified test report is available upon
request. For a copy, please order Eaton’s Cooper Power Systems
document CP1122.
20.78
21.8
22.86
24.0
Production tests
24.9
26.2
Eaton’s Cooper Power Systems has implemented a complete
production test program to ensure a quality product. Each MOV disk
is subjected to a series of electrical tests to maintain quality. We
also perform additional tests on every MOV disk batch. Listed below
are the tests performed on the MOV disks:
34.5
36.2
46.0
48.3
69.0
72.5
115
121
138
145
161
169
230
242
•
100% Physical Inspection
•
100% Discharge Voltage Test
•
100% Vref at Iref
•
100% Watt Loss Measured at 1.05 x MCOV
•
100% Transmission Line Discharge Energy Test
•
Batch High-Current, Short-Duration Test
•
Batch Thermal Stability Test
•
Batch Aging Test
1.600
Each fully assembled UltraSIL Polymer-Housed Station-Class Arrester
must also pass the following production tests:
100% Physical Inspection
•
100% Vref Test
•
100% Watt Loss Test
•
100% Partial Discharge Inception Voltage Test
General application recommendations
The rating of an arrester is the maximum power-frequency lineto-ground voltage at which the arrester is designed to pass an
operating duty-cycle test (as defined in IEEE Std C62.11™-2005
standard). Table 2 provides a general application guide for the
selection of the proper arrester rating for a given system voltage
and grounding configurations as outlined in IEEE Std C62.22™2009 standard, which is the application guide for metal oxide surge
arresters.
Under fault conditions and other system anomalies, higher than
normal voltages can be imposed upon an arrester. With an improper
arrester selection, these abnormal system voltages can cause an
arrester to fail. To help ensure that the proper arrester is selected,
Eaton’s Cooper Power Systems application engineers are available to
make recommendations.
1.500 1.486
1.427
1.417
1.400
1.358
Voltage (per unit COV)
•
Delta and
Ungrounded
Wye
1.300
No Prior Duty
1.348
1.289
1.279
1.220
1.200
1.210
Prior Duty
1.151
1.100
1.000
1.141
1.082
0.1
1
10
100
1000
10000
Time (sec)
Figure 2. Temporary overvoltage curve – 60° ambient
temperature.
www.cooperpower.com TD235013EN-3
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
The following information is normally required:
1. Maximum system operating voltage.
through 120 kV. Please select the proper mounting arrangement
option in the catalog number as shown in Table 10, (on Page 15) digit
16.
2. System grounding conditions;
* Field base conversion for Types UH and UX only.
A. For four-wire circuits, grounding conditions depend upon
whether the system is multi-grounded, whether it has
a neutral impedance and whether common primary and
secondary neutrals are used.
B. For three-wire circuits, grounding conditions depend upon
whether the system is solidly grounded at the source,
grounded through neutral impedance at the source transformers or ungrounded.
3. Available Fault Current.
4. Maximum line-to-ground voltage and overvoltage duration during
fault conditions.
Contact your Eaton’s Cooper Power Systems representative to have
your individual system application needs reviewed.
Temporary overvoltage (TOV) withstand
ability
The UltraSIL Polymer-Housed Type US, UH, and UX Arrester’s ability
to withstand 60 Hz overvoltage conditions (TOVs) is shown in Figure
2. The graph illustrates the time an arrester can survive a voltage,
and recover, without going into thermal runaway, for a given voltage
magnitude (expressed in Per Unit of arrester MCOV).
The graphs in Figure 2 illustrate TOV withstand ability, with and
without prior duty. The prior duty curve is based upon absorption of
rated energy (Refer to Table 1 — Single Impulse Rating) immediately
preceding application of the overvoltage.
Mounting information
The standard base of the UltraSIL Polymer-Housed Type US, UH, and
UX Arresters is designed for mounting on 8.75” or 10” diameter bolt
circle patterns. The three slotted mounting holes are spaced 120°
from each other and are designed to handle 0.5” diameter bolts.
Mounting hardware (bolts, nuts, and washers) is not in­cluded with
the arrester. See Figure 3 for mounting base details. An inherently
strong design allows these arresters to be mounted in a variety of
ways. They can be mounted vertically, with attachment at the base,
or suspension (underhung) mounted. Eaton’s Cooper Power Systems
offers more flexibility for customers to mount arresters in the field.
Station-class arresters can be configured in the underhung position
(suspension mount) at the plant or with a unique new option
assembled in the field in the underhung position*. UltraSIL PolymerHoused Station-Class Arresters can also be horizontally mounted
120° TYPICAL
(3) 0.56” x 1.18”
MOUNTING SLOTS
8.75” —
10.00”
DIA. BOLT
CIRCLE
THICKNESS OF
MOUNTING FEET
IS 1.25”
Figure 3. Mounting base details.
TD235013EN-4 www.cooperpower.com
Ordering information
Table 3 includes the shortened catalog numbers for UltraSIL
Polymer-Housed Type US, UH, and UX Arresters. The arrester
represented by the shortened catalog number is configured with the
standard configurations shown in Table 10. The shortened catalog
numbers shown in Table 3 represent the same catalog numbers
shown in Table 9. For example, catalog number USAA060A from
Table 3 represents the same catalog number USAA060048A2845A11
from Table 9. Eaton’s Cooper Power Systems offers other options
that allow customers to select specific features they desire. Options
on housing sizes (creepage length), hardware, and mounting options
are available and defined in Table 10. This table allows customers
who prefer options different from those in our standard Table 9
configuration to develop a catalog number which provides the unique
features they desire. For additional assistance please contact your
Eaton’s Cooper Power Systems sales representative.
Table 3. Shortened Catalog Numbers for Standard
Configuration Types US, UH, and UX Surge Arresters
Arrester Rating/MCOV
(kV rms)
Type US
Type UH
Type UX
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
USAA003A
USAA006A
USAA009A
USAA010A
USAA012A
USAA015A
USAA018A
USAA021A
USAA024A
USAA027A
USAA030A
USAA033A
USAA036A
USAA039A
USAA042A
USAA045A
USAA048A
USAA054A
USAA060A
USAA066A
USAA072A
USAA078A
USAA084A
USAA090A
USAA096A
USAA108A
USAA120A
USAA132A
USAA138A
USAA144A
USAA162A
USAA168A
USAA172A
USAA180A
USAA192A
USAA198A
USAA204A
USAA216A
USAA228A
USAA240A
UHAA003A
UHAA006A
UHAA009A
UHAA010A
UHAA012A
UHAA015A
UHAA018A
UHAA021A
UHAA024A
UHAA027A
UHAA030A
UHAA033A
UHAA036A
UHAA039A
UHAA042A
UHAA045A
UHAA048A
UHAA054A
UHAA060A
UHAA066A
UHAA072A
UHAA078A
UHAA084A
UHAA090A
UHAA096A
UHAA108A
UHAA120A
UHAA132A
UHAA138A
UHAA144A
UHAA162A
UHAA168A
UHAA172A
UHAA180A
UHAA192A
UHAA198A
UHAA204A
UHAA216A
UHAA228A
UHAA240A
UXAA003A
UXAA006A
UXAA009A
UXAA010A
UXAA012A
UXAA015A
UXAA018A
UXAA021A
UXAA024A
UXAA027A
UXAA030A
UXAA033A
UXAA036A
UXAA039A
UXAA042A
UXAA045A
UXAA048A
UXAA054A
UXAA060A
UXAA066A
UXAA072A
UXAA078A
UXAA084A
UXAA090A
UXAA096A
UXAA108A
-
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17.0
19.5
22
24.4
27.5
29
31.5
34
36.5
39
42
48
53
57
62
68
72
76
84
98
106
111
115
130
131
140
144
152
160
165
174
180
190
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Protective characteristics
All UltraSIL Polymer-Housed Type US, UH, and UX Arresters provide
excellent overvoltage protection for electrical equipment. The
specific protective characteristics for each arrester rating are shown
in Table 4 for US arresters, Table 5 for UH arresters and Table 6 for
UX Arresters. These tables are on pages 5, 6 and 7.
Table 4. Protective Characteristics of the UltraSIL Polymer-Housed Station-Class Arrester-Type US
Maximum Discharge Voltage (kV Crest)
8/20µs Current Wave
Switching Surge Protective Level***
(kV crest)
1 Sec
10
Sec
Front-of-wave
Protective
Level**
(kV Crest)
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
125 A
250 A
500 A
1000 A
3.5
6.9
10.4
11.4
13.9
17.2
20.8
23.1
26.5
29.9
33.1
37.3
39.4
42.8
46.2
49.6
53
57
65.2
72
77.4
84.2
92.3
97.8
103.2
114.1
133.1
143.9
150.7
156.2
176.5
177.9
190.1
195.6
206.4
217.3
224.1
236.3
244.4
258
3.3
6.6
9.9
10.8
13.1
16.4
19.7
21.9
25.1
28.4
31.5
35.4
37.4
40.6
43.8
47
50.3
54.1
61.9
68.3
73.5
79.9
87.7
92.8
98
108.3
126.3
136.6
143.1
148.2
167.6
168.9
180.5
185.6
195.9
206.2
212.7
224.3
232
244.9
8.8
17.5
26.2
28.8
34.9
43.5
52.4
58.2
66.7
75.3
83.5
94.1
99.2
108
117
125
134
144
165
182
195
213
233
247
260
288
314
339
355
368
416
419
448
461
486
512
528
556
576
608
6.8
13.6
20.4
22.4
27.2
33.8
40.8
45.3
51.9
58.6
65
73.2
77.2
83.9
90.5
97.2
104
112
128
142
152
165
181
192
203
224
250
270
283
293
331
334
357
367
387
408
420
443
459
484
7.2
14.4
21.6
23.7
28.8
35.8
43.1
47.9
55
62
68.8
77.5
81.7
88.8
95.8
103
110
119
136
150
161
175
192
203
215
237
263
285
298
309
349
352
376
387
408
430
443
467
483
510
7.6
15.2
22.7
24.9
30.3
37.7
45.4
50.4
57.8
65.2
72.3
81.5
86
93.4
101
109
116
125
143
158
169
184
202
214
226
249
275
298
312
323
365
368
393
404
427
449
463
488
505
533
8.3
16.6
24.9
27.3
33.1
41.3
49.7
55.2
63.3
71.4
79.2
89.3
94.2
103
111
119
127
137
156
172
185
202
221
234
247
273
298
323
338
350
396
399
426
438
463
487
502
529
548
578
9.1
18.2
27.3
29.9
36.3
45.2
54.5
60.5
69.4
78.3
86.8
97.9
104
113
121
130
139
150
171
189
203
221
242
257
271
299
323
349
366
379
429
432
461
475
501
527
544
573
593
626
10.4
20.7
31.1
34.1
41.4
51.5
62.1
69
79.1
89.2
98.9
112
118
128
138
148
159
171
195
215
232
252
276
292
309
341
361
390
408
423
478
482
515
530
559
589
607
640
662
699
5.9
11.8
17.7
19.4
23.5
29.3
35.3
39.2
44.9
50.7
56.2
63.3
66.8
72.5
78.3
84
89.8
96.7
111
122
132
143
157
166
175
194
219
237
248
257
291
293
313
322
340
358
369
389
402
424
6.1
12.1
18.1
19.9
24.1
30.1
36.2
40.2
46.1
52
57.7
65
68.6
74.5
80.4
86.3
92.2
99.3
114
126
135
147
161
171
180
199
225
243
255
264
298
300
321
330
348
367
378
399
413
435
6.3
12.5
18.8
20.6
25
31.1
37.5
41.6
47.8
53.9
59.8
67.3
71
77.1
83.2
89.4
95.5
103
118
130
140
152
167
177
186
206
232
251
263
272
308
310
331
341
360
378
390
412
426
449
6.6
13.1
19.6
21.5
26.1
32.5
39.1
43.5
49.8
56.2
62.4
70.3
74.1
80.5
86.9
93.3
99.6
108
123
136
146
159
174
184
195
215
241
261
273
283
319
322
344
354
373
393
405
427
442
467
Arrester
Rating
(kV, rms)
Arrester
MCOV
(kV rms)
TOV*
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27.5
29
31.5
34
36.5
39
42
48
53
57
62
68
72
76
84
98
106
111
115
130
131
140
144
152
160
165
174
180
190
* Temporary Overvoltage (TOV) with Prior Duty.
** Based on a 10 kA current impulse that results in a discharge voltage cresting in 0.5 µs.
*** 45-60 µs rise time for a 500 A peak current surge.
www.cooperpower.com TD235013EN-5
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Table 5. Protective Characteristics of the UltraSIL Polymer-Housed Station-Class Arrester-Type UH
Arrester
Rating
(kV, rms)
Arrester
MCOV
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27.5
29
31.5
34
36.5
39
42
48
53
57
62
68
72
76
84
98
106
111
115
130
131
140
144
152
160
165
174
180
190
TOV*
1 Sec
10
Sec
Front-of-wave
Protective
Level**
(kV Crest)
3.5
6.9
10.4
11.4
13.9
17.2
20.8
23.1
26.5
29.9
33.1
37.3
39.4
42.8
46.2
49.6
53
57
65.2
72
77.4
84.2
92.3
97.8
103.2
114.1
133.1
143.9
150.7
156.2
176.5
177.9
190.1
195.6
206.4
217.3
224.1
236.3
244.4
258
3.3
6.6
9.9
10.8
13.1
16.4
19.7
21.9
25.1
28.4
31.5
35.4
37.4
40.6
43.8
47
50.3
54.1
61.9
68.3
73.5
79.9
87.7
92.8
98
108.3
126.3
136.6
143.1
148.2
167.6
168.9
180.5
185.6
195.9
206.2
212.7
224.3
232
244.9
8.2
16.3
24.5
26.9
32.6
40.6
48.9
54.4
62.4
70.3
78
87.9
92.7
101
109
117
125
135
154
170
183
199
218
231
243
269
297
321
336
348
394
397
424
436
460
485
500
527
545
575
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
125 A
250 A
500 A
1000 A
6.5
13
19.5
21.4
26
32.4
39
43.3
49.7
56
62.1
70
73.8
80.2
86.6
92.9
99.3
107
123
135
146
158
174
184
194
214
242
262
274
284
321
323
346
355
375
395
407
429
444
469
6.9
13.7
20.6
22.6
27.4
34.1
41.1
45.6
52.3
59
65.5
73.8
77.8
84.5
91.2
97.9
105
113
129
143
153
167
183
194
204
226
253
274
287
297
336
339
362
372
393
413
426
450
465
491
7.2
14.3
21.5
23.6
28.6
35.6
42.9
47.7
54.7
61.7
68.4
77.1
81.3
88.3
95.3
103
110
118
135
149
160
174
191
202
214
236
263
285
298
309
349
352
376
387
408
430
443
467
483
510
7.8
15.6
23.3
25.6
31.1
38.7
46.6
51.7
59.3
66.9
74.2
83.6
88.2
95.8
104
111
119
128
146
162
174
189
207
219
232
256
284
307
321
333
376
379
405
417
440
463
477
503
521
550
8.4
16.8
25.2
27.7
33.6
41.9
50.4
56
64.2
72.5
80.4
90.6
95.5
104
112
121
129
139
159
175
188
205
224
238
251
277
303
328
343
356
402
405
433
445
470
495
510
538
557
587
9.4
18.8
28.2
30.9
37.5
46.7
56.3
62.5
71.7
80.9
89.7
102
107
116
125
135
144
155
177
195
210
228
250
265
280
309
334
361
378
392
443
446
477
491
518
545
562
593
613
647
5.7
11.4
17.1
18.8
22.8
28.4
34.2
38
43.6
49.1
54.5
61.4
64.8
70.3
75.9
81.5
87.1
93.8
108
119
128
139
152
161
170
188
214
232
243
251
284
286
306
315
332
350
361
380
393
415
5.9
11.7
17.6
19.3
23.4
29.1
35.1
39
44.7
50.4
55.9
63
66.4
72.2
77.9
83.6
89.3
96.2
110
122
131
142
156
165
174
193
219
237
248
257
291
293
313
322
340
358
369
389
403
425
6.1
12.1
18.1
19.9
24.1
30
36.2
40.2
46.1
52
57.7
65
68.6
74.5
80.4
86.3
92.2
99.3
114
126
135
147
161
171
180
199
226
244
256
265
300
302
323
332
350
369
380
401
415
438
6.3
12.6
18.8
20.7
25.1
31.2
37.6
41.8
47.9
54
59.9
67.5
71.2
77.3
83.5
89.6
95.7
104
118
131
140
153
167
177
187
207
234
253
265
274
310
312
334
343
362
382
393
415
429
453
* Temporary Overvoltage (TOV) with Prior Duty.
** Based on a 10 kA current impulse that results in a discharge voltage cresting in 0.5 µs.
*** 45-60 µs rise time for a 500 A peak current surge.
TD235013EN-6 www.cooperpower.com
Switching Surge Protective
Level***
(kV crest)
Maximum Discharge Voltage (kV Crest)
8/20μs Current Wave
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Table 6. Protective Characteristics of the UltraSIL Polymer-Housed Station-Class Arrester-Type UX
Arrester
Rating
(kV, rms)
Arrester
MCOV
(kV rms)
TOV*
1 Sec
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27.5
29
31.5
34
36.5
39
42
48
53
57
62
68
72
76
84
3.5
6.9
10.4
11.4
13.9
17.2
20.8
23.1
26.5
29.9
33.1
37.3
39.4
42.8
46.2
49.6
53
57
65.2
72
77.4
84.2
92.3
97.8
103.2
114.1
Maximum Discharge Voltage (kV Crest
8/20μs Current Wave
10 Sec
Front-of-wave
Protective
Level**
(kV Crest)
Switching Surge Protective Level***
(kV Crest)
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
125 A
250 A
500 A
1000 A
3.3
6.6
9.9
10.8
13.1
16.4
19.7
21.9
25.1
28.4
31.5
35.4
37.4
40.6
43.8
47
50.3
54.1
61.9
68.3
73.5
79.9
87.7
92.8
98
108.3
7.8
15.5
23.2
25.5
30.9
38.5
46.3
51.5
59.1
66.6
73.9
83.3
87.8
95.4
103
111
119
128
146
161
173
188
206
218
230
255
6.3
12.6
18.9
20.8
25.2
31.4
37.8
42
48.1
54.3
60.2
67.8
71.5
77.7
83.9
90
96.2
104
119
131
141
153
168
178
188
208
6.6
13.2
19.8
21.7
26.4
32.8
39.5
43.9
50.4
56.8
63
71
74.9
81.3
87.8
94.2
101
109
124
137
148
161
176
186
197
217
6.9
13.7
20.6
22.6
27.4
34.1
41.1
45.6
52.3
59.1
65.5
73.8
77.8
84.5
91.2
97.9
105
113
129
143
153
167
183
194
204
226
7.4
14.8
22.2
24.3
29.5
36.8
44.3
49.2
56.4
63.6
70.6
79.5
83.9
91.1
98.3
106
113
122
139
154
165
180
197
209
220
243
7.9
15.8
23.7
26
31.6
39.3
47.3
52.6
60.3
68
75.4
85
89.6
97.4
106
113
121
130
149
164
177
192
211
223
235
260
8.7
17.4
26.1
28.6
34.8
43.3
52.1
57.9
66.4
74.9
83.1
93.7
98.8
108
116
125
133
143
164
181
195
212
232
246
259
286
5.6
11.2
16.7
18.4
22.3
27.8
33.4
37.1
42.6
48.1
53.3
60.1
63.3
68.8
74.2
79.7
85.1
91.7
105
116
125
136
149
158
166
184
5.7
11.4
17.1
18.8
22.8
28.4
34.2
38
43.6
49.2
54.6
61.5
64.8
70.4
76
81.6
87.2
93.9
108
119
128
139
152
161
170
188
5.9
11.8
17.6
19.4
23.5
29.3
35.2
39.2
44.9
50.7
56.2
63.3
66.8
72.5
78.3
84
89.8
96.7
111
122
132
143
157
166
175
194
6.1
12.2
18.3
20.1
24.3
30.3
36.5
40.5
46.5
52.4
58.2
65.5
69.1
75.1
81
87
92.9
101
115
127
136
148
162
172
181
201
* Temporary Overvoltage (TOV) with Prior Duty.
** Based on a 10 kA current impulse that results in a discharge voltage cresting in 0.5 µs.
*** 45-60 µs rise time for a 500 A peak current surge.
www.cooperpower.com TD235013EN-7
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Table 7. Creepage Distances and Insulation Withstand Voltages of UltraSIL Polymer-Housed Station-Class Arresters
Insulation Withstand Voltages
Creepage
Distance
(Inches)
Switching
Surge Impulse
(kV, Crest)
1.2/50 Impulse
(kV, Crest)
60 Hz, dry
60 Seconds
(kV, rms)
60 Hz, wet
10 Seconds
(kV, rms)
Arrester
Rating
(kV, rms)
Arrester
MCOV
(kV, rms)
US
UH
UX
US
UH
UX
US
UH
UX
US
UH
UX
US
UH
UX
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17.0
19.5
22.0
24.4
27.5
29.0
31.5
34.0
36.5
39.0
42.0
48.0
53.0
57.0
62.0
68.0
72.0
76.0
84.0
98.0
106
111
115
130
131
140
144
152
160
165
174
180
190
30.7
38.4
38.4
38.4
46.1
46.1
53.7
53.7
61.4
61.4
69.1
69.1
69.1
84.4
84.4
92.1
99.8
99.8
107.5
138.2
138.2
153.5
168.9
176.6
184.3
199.6
215
230.3
245.7
245.7
307.1
314.8
322.4
330.1
337.8
353.2
360.8
406.9
422.2
429.9
30.7
38.4
38.4
38.4
46.1
46.1
53.7
53.7
61.4
61.4
69.1
69.1
69.1
84.4
84.4
92.1
99.8
99.8
107.5
115.2
122.8
153.5
168.9
176.6
184.3
199.6
215
230.3
245.7
245.7
307.1
314.8
322.4
330.1
337.8
353.2
360.8
406.9
422.2
429.9
30.7
38.4
38.4
38.4
46.1
46.1
53.7
53.7
61.4
61.4
69.1
69.1
69.1
84.4
84.4
92.1
99.8
99.8
107.5
115.2
122.8
153.5
168.9
176.6
184.3
199.6
-
115
134
134
134
155
155
176
176
201
201
217
217
217
252
252
275
294
294
316
434
434
469
504
527
550
588
638
591
631
631
830
851
872
893
914
955
973
1128
1170
1190
119
137
137
137
158
158
178
178
201
201
218
218
218
258
258
279
298
298
319
340
361
476
516
537
558
596
642
595
637
637
833
854
875
897
918
963
981
1133
1175
1198
126
138
138
138
159
159
179
179
206
206
220
220
220
262
262
281
300
300
321
342
364
482
524
543
562
600
-
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
972
994
1040
1062
1197
1247
1272
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1029
1052
1083
1106
1296
1320
1332
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
-
80
94
94
94
109
109
123
123
140
140
151
151
151
172
172
188
201
201
212
302
302
323
344
360
376
402
430
460
492
492
617
631
646
662
677
707
722
818
846
860
77
90
90
90
104
104
118
118
140
140
146
146
146
166
166
188
201
201
215
230
246
312
332
354
376
402
422
448
474
474
615
624
637
650
663
685
698
817
835
844
82
90
90
90
104
104
117
117
135
135
144
144
144
168
168
184
202
202
211
224
237
312
336
352
368
404
-
64
75
75
75
88
88
101
101
113
113
126
126
126
152
152
162
173
173
187
252
252
278
304
314
324
346
384
412
426
426
564
570
584
591
605
618
632
750
762
768
63
75
75
75
88
88
101
101
113
113
128
128
128
156
156
167
186
186
192
206
213
284
312
323
334
372
376
402
420
420
540
552
565
574
587
608
621
716
740
752
60
71
71
71
84
84
97
97
116
116
123
123
123
154
154
162
176
176
188
201
210
277
308
316
324
352
-
* Creepage distances are based on standard arrester build configurations.
TD235013EN-8 www.cooperpower.com
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Spacing requirements
C
B
C
B
Figure 4 illustrates a three-phase in-line mounting arrangement.
Dimen­sions B and C reference mini­mum phase-to-ground and
phase-to-phase distances respectively. These dimensions are listed
in Table 8.
B
Figure 4. Three-phase In-line mounting arrangement.
Table 8. Dimensions, Clearance Requirements, and Weights of UltraSIL Polymer-Housed Station-Class Arresters (Standard
Configuration)
Figure 4
Dim. “B” Minimum
Phase-to-Ground
Clearances (inches)*
Figure 7
Dim. “A”
(Inches)
Figure 4
Dim. “C” Minimum
Phase-to-Phase
Clearances (inches)*
Figure 7
Dim. “D”
(inches)
Weight
(lbs.)
Arrester
Rating
(kV, rms)
Arrester
MCOV
(kV, rms)
US
UH
UX
US
UH
UX
US
UH
UX
US
UH
UX
US
UH
UX
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17.0
19.5
22.0
24.4
27.5
29.0
31.5
34.0
36.5
39.0
42.0
48.0
53.0
57.0
62.0
68.0
72.0
76.0
84.0
98.0
106
111
115
130
131
140
144
152
160
165
174
180
190
8.2
9.7
9.7
9.7
11.3
11.3
12.8
12.8
14.4
14.4
16
16
16
19.1
19.1
20.6
22.2
22.2
23.7
30
30
33.2
36.3
37.8
39.3
42.5
45.6
48.7
51.8
51.8
68.3
69.8
71.4
72.9
74.5
77.6
79.2
88.6
91.7
93.2
8.2
9.7
9.7
9.7
11.3
11.3
12.8
12.8
14.4
14.4
16
16
16
19.1
19.1
20.6
22.2
22.2
23.7
25.3
26.8
33.2
36.3
37.8
39.3
42.5
45.6
48.7
51.8
51.8
68.3
69.8
71.4
72.9
74.5
77.6
79.2
88.6
91.7
93.2
8.2
9.7
9.7
9.7
11.3
11.3
12.8
12.8
14.4
14.4
16
16
16
19.1
19.1
20.6
22.2
22.2
23.7
25.3
26.8
33.2
36.3
37.8
39.3
42.5
-
5.5
5.5
5.9
6.1
6.6
7.5
8.6
8.6
9.5
10.5
11.5
12.7
13.3
14.3
15.2
16.2
17.2
18.4
20.8
22.7
24.3
26.3
28.7
30.2
31.8
35
35.6
46.9
48.6
50
55.2
55.5
58.6
60
62.7
65.5
67.2
70.3
73.1
75.8
5.5
5.5
5.6
5.8
6.2
6.9
7.8
7.8
8.5
9.4
10.2
11.3
11.8
12.7
13.5
14.4
15.3
16.3
18.4
20.1
21.5
23.2
25.3
26.6
28
30.8
33.1
44.2
45.8
47.1
51.8
52.2
55
56.3
58.9
61.4
63
65.9
68.5
71
5.5
5.5
5.6
5.7
6
6.6
7.4
7.4
8
8.8
9.6
10.6
11.1
11.9
12.7
13.5
14.3
15.2
17.2
18.7
20
21.6
23.5
24.8
26.1
28.7
-
10
10
10.4
10.6
11.1
12
13.1
13.1
14
15
16
17.2
17.8
18.8
19.7
20.7
21.7
22.9
25.3
27.2
28.8
30.8
33.2
34.7
36.3
39.5
40.1
59.9
61.6
63
68.2
68.5
71.6
73
75.7
78.5
80.2
83.3
86.1
88.8
10
10
10.1
10.3
10.7
11.4
12.3
12.3
13
13.9
14.7
15.8
16.3
17.2
18
18.9
19.8
20.8
22.9
24.6
26
27.7
29.8
31.1
32.5
35.3
37.6
57.2
58.8
60.1
64.8
65.2
68
69.3
71.9
74.4
76
78.9
81.5
84
10
10
10.1
10.2
10.5
11.1
11.9
11.9
12.5
13.3
14.1
15.1
15.6
16.4
17.2
18
18.8
19.7
21.7
23.2
24.5
26.1
28
29.3
30.6
33.2
-
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.13
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.49
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
5.93
-
13.2
15.4
15.4
15.4
15.4
15.4
17.6
17.6
17.6
17.6
17.6
17.6
17.6
19.8
19.8
22
22
22
22
26.5
26.5
28.7
30.9
33.1
33.1
35.3
41.9
50.7
55.1
55.1
68.3
68.3
68.3
72.8
72.8
77.2
77.2
83.8
83.8
83.8
15.4
15.4
15.4
15.4
17.6
17.6
17.6
17.6
19.8
19.8
22
22
22
24.3
24.3
24.3
26.5
26.5
26.5
28.7
30.9
35.3
39.7
37.5
37.5
39.7
55.1
63.9
70.5
70.5
83.8
83.8
86
90.4
92.6
97
99.2
103.6
108
108
15.4
17.6
17.6
17.6
19.8
19.8
22
22
22
22
26.5
26.5
26.5
26.5
26.5
30.9
30.9
30.9
35.3
35.3
39.7
44.1
44.1
46.3
48.5
50.7
-
* Phase-to-Ground clearances are expressed as minimum arrester centerline-to-ground distances. Phase-to-Phase clearances are expressed as minimum arrester centerline-to-centerline distances.
www.cooperpower.com TD235013EN-9
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
4.72”
4.72”
Stud Collar Height = 0.375”
11.44”
A
Ø26”
4.72”
A
ØD
ØD
1.25”
1.25”
Arrester Rating:
3 - 120 kV
132 - 240 kV
Figure 5. Outline drawing of standard UltraSIL Polymer-Housed Station-Class Arresters (for standard catalog numbers see Table 9).
Table 9 Catalog Numbers for Standard Configuration Type US,
UH, and UX Surge Arresters
Arrester
Rating
(kV, rms)
US
UH
UX
Arrester
Rating
(kV, rms)
US
UH
UX
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
USAA003002A0845A11
USAA006005A1045A11
USAA009007A1045A11
USAA010008A1045A11
USAA012010A1245A11
USAA015012A1245A11
USAA018015A1445A11
USAA021017A1445A11
USAA024019A1645A11
USAA027022A1645A11
USAA030024A1845A11
USAA033027A1845A11
USAA036029A1845A11
USAA039031A2245A11
USAA042034A2245A11
USAA045036A2445A11
USAA048039A2645A11
USAA054042A2645A11
USAA060048A2845A11
USAA066053A3645A11
UHAA003002A0845A11
UHAA006005A1045A11
UHAA009007A1045A11
UHAA010008A1045A11
UHAA012010A1245A11
UHAA015012A1245A11
UHAA018015A1445A11
UHAA021017A1445A11
UHAA024019A1645A11
UHAA027022A1645A11
UHAA030024A1845A11
UHAA033027A1845A11
UHAA036029A1845A11
UHAA039031A2245A11
UHAA042034A2245A11
UHAA045036A2445A11
UHAA048039A2645A11
UHAA054042A2645A11
UHAA060048A2845A11
UHAA066053A3045A11
UXAA003002A0845A11
UXAA006005A1045A11
UXAA009007A1045A11
UXAA010008A1045A11
UXAA012010A1245A11
UXAA015012A1245A11
UXAA018015A1445A11
UXAA021017A1445A11
UXAA024019A1645A11
UXAA027022A1645A11
UXAA030024A1845A11
UXAA033027A1845A11
UXAA036029A1845A11
UXAA039031A2245A11
UXAA042034A2245A11
UXAA045036A2445A11
UXAA048039A2645A11
UXAA054042A2645A11
UXAA060048A2845A11
UXAA066053A3045A11
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
USAA072057A3645A11
USAA078062A4045A11
USAA084068A4445A11
USAA090072A4645A11
USAA096076A4845A11
USAA108084A5245A11
USAA120098A5645A11
USAA132106A6045A11
USAA138111A6445A11
USAA144115A6445A11
USAA162130A8045A11
USAA168131A8245A11
USAA172140A8445A11
USAA180144A8645A11
USAA192152A8845A11
USAA198160A9245A11
USAA204165A9445A11
USAA216174AA645A11
USAA228180AB045A11
USAA240190AB245A11
UHAA072057A3245A11
UHAA078062A4045A11
UHAA084068A4445A11
UHAA090072A4645A11
UHAA096076A4845A11
UHAA108084A5245A11
UHAA120098A5645A11
UHAA132106A6045A11
UHAA138111A6445A11
UHAA144115A6445A11
UHAA162130A8045A11
UHAA168131A8245A11
UHAA172140A8445A11
UHAA180144A8645A11
UHAA192152A8845A11
UHAA198160A9245A11
UHAA204165A9445A11
UHAA216174AA645A11
UHAA228180AB045A11
UHAA240190AB245A11
UXAA072057A3245A11
UXAA078062A4045A11
UXAA084068A4445A11
UXAA090072A4645A11
UXAA096076A4845A11
UXAA108084A5245A11
TD235013EN-10 www.cooperpower.com
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Table 10. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed Station-Class Arresters
1
U
2
3
A
4
A
5
6
7
8
9
10
11
A
12
13
14
15
16
17
18
Catalog Number Digits:
1 = “U” (UltraSIL Polymer-Housed Arrester)
S = Standard Energy Handling
2 = H = High Energy Handling
X = Xtra-High Energy Handling
3 = “A” Standard Electrical Build
4 = “A” Standard Cantilever Strength*
* Consult manufacturer for further information regarding additional cantilever strengths.
5 through 10 = Arrester Rating: Duty-cycle (MCOV)
003002 = 3 kV (2.55 kV)
042034 = 42 kV (34.0 kV)
138111 = 138 kV (111 kV)
006005 = 6 kV (5.1 kV)
045036 = 45 kV (36.5 kV)
144115 = 144 kV (115 kV)
009007 = 9 kV (7.65 kV)
048039 = 48 kV (39.0 kV)
162130 = 162 kV (130) kV
010008 = 10 kV (8.4 kV)
054042 = 54 kV (42.0 kV)
168131 = 168 kV (131 kV)
012010 = 12 kV (10.2 kV)
060048 = 60 kV (48.0 kV)
172140 = 172 kV (140 kV)
015012 = 15 kV (12.7 kV)
066053 = 66 kV (53.0 kV)
180144 = 180 kV (144 kV)
018015 = 18 kV (15.3 kV)
072057 = 72 kV (57.0 kV)
192152 = 192 kV (152 kV)
021017 = 21 kV (17.0 kV)
078062 = 78 kV (62.0 kV)
198160 = 198 kV (160 kV)
024019 = 24 kV (19.5 kV)
084068 = 84 kV (68.0 kV)
204165 = 204 kV (165 kV)
027022 = 27 kV (22.0 kV)
090072 = 90 kV (72.0 kV)
216174 = 216 kV (174 kV)
030024 = 30 kV (24.4 kV)
096076 = 96 kV (76.0 kV)
228180 = 228 kV (180 kV)
240190 = 240 kV (190 kV)
033027 = 33 kV (27.0 kV)
108084 = 108 kV (84.0 kV)
036029 = 36 kV (29.0 kV)
120098 = 120 kV (98.0 kV)
039031 = 39 kV (31.5 kV)
132106 = 132 kV (106 kV)
11 = “A” Standard High Creep UltraSIL Polymer-Housing
www.cooperpower.com TD235013EN-11
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Table 10. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed Station-Class Arresters (continued)
1
2
U
3
4
A
A
5
6
7
8
9
10
11
12
A
13
14
15
16
17
18
Catalog Number Digits:
12 and 13 = Housing Code (Select from Table below): * = Standard Housing (31 mm/kV), 0 = Optional Housing
Type US Housing Codes Digits
12 & 13
08
10
12
14
16
18
20
22
24
26
28
36
40
44
46
48
50
52
54
56
60
64
80
Leakage
Distance
(in.)
Arrester
Rating
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
30.7 38.4 46.1 53.7 61.4
69.1 76.8 84.4 92.1 99.8 107.5 138.2 153.5 168.9 176.6 184.3 192
199.6 207.3 215
230.3 245.7 307.1
*
*
*
*
O
O
O
*
*
O
O
O
O
*
*
O
O
O
O
*
*
O
O
O
O
O
*
*
*
O
O
O
O
O
O
O
O
O
O
O
O
O
*
*
O
O
O
O
O
O
O
*
O
O
O
O
O
O
*
*
O
O
O
O
O
O
*
*
*
*
O
*
O
O
*
O
O
O
*
O
O
O
O
O
O
O
O
*
O
O
O
O
O
O
O
O
*
*
O
*
*
O
O
O
*
continued on page 13
TD235013EN-12 www.cooperpower.com
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
82
84
86
88
90
92
94
96
98
A0
A4
A6
A8
B0
B2
B4
B6
B8
Digits
12 & 13
Leakage
Distance
(in.)
314.8 322.4 330.1 337.8 345.5 353.2 360.8 368.5 376.2 383.9 399.3 406.9 414.6 422.2 429.9 437.6 445.3 453
O
O
O
O
*
O
O
O
O
*
O
O
O
*
*
O
O
*
O
O
*
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
*
O
O
O
O
O
O
O
O
*
O
O
O
O
*
O
O
O
O
O
O
O
O
O
O
O
O
Arrester
Rating
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
continued from page 12
www.cooperpower.com TD235013EN-13
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Table 10. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed Station-Class Arresters (continued)
1
U
2
3
4
A
A
5
6
7
8
9
10
11
12
A
13
14
15
16
17
18
Catalog Number Digits:
12 and 13 = Housing Code (Select from Table below): * = Standard Housing (31 mm/kV), 0 = Optional Housing
Type UH Housing Codes Digits12
& 13
08
10
12
14
16
Leakage
30.7 38.4 46.1 53.7 61.4
Distance
(in.)
Arrester
Rating
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
18
20
22
24
26
28
30
32
36
40
44
46
48
50
69.1 76.8 84.4 92.1 99.8 107.5 115.2 122.8 138.2 153.5 168.9 176.6 184.3 192
52
54
56
199.6 207.3 215
58
222.7
*
*
*
*
O
O
O
*
*
O
O
O
O
*
*
O
O
O
O
*
*
O
O
O
O
O
*
*
*
O
O
O
O
O
O
O
O
O
O
O
O
O
*
*
O
O
O
O
O
O
O
*
O
O
O
O
O
O
*
*
O
O
O
O
O
O
*
O
O
O
O
O
O
*
O
*
O
O
O
O
*
O
O
*
O
O
O
*
O
O
O
O
*
O
O
O
O
O
O
O
O
O
*
O
O
O
O
O
O
O
O
*
O
O
O
continued on page 15
TD235013EN-14 www.cooperpower.com
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
60
64
80
82
84
86
88
90
92
94
96
98
A0
A4
A6
A8
B0
B2
B4
B6
B8
230.3 245.7 307.1 314.8 322.4 330.1 337.8 345.5 353.2 360.8 368.5 376.2 383.9 399.3 406.9 414.6 422.2 429.9 437.6 445.3 453
O
O
*
O
*
*
O
O
O
*
O
O
O
O
*
O
O
O
O
*
O
O
O
*
O
O
O
O
*
O
O
O
O
O
O
*
O
O
*
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
*
O
O
O
O
O
O
O
O
*
O
O
O
O
*
O
O
O
O
O
O
O
O
O
O
O
O
C0
460.7
O
O
O
Digits 12
& 13
Leakage
Distance
(in.)
Arrester
Rating
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
continued from page 14
www.cooperpower.com TD235013EN-15
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Table 10. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed Station-Class Arresters (continued)
1
2
U
3
4
A
A
5
6
7
8
9
10
11
A
12
13
14
15
16
17
18
Catalog Number Digits:
12 and 13 = Housing Code (Select from Table below): * = Standard Housing (31 mm/kV), 0 = Optional Housing
Type UX Housing Codes Digits 12
& 13
08
10
12
14
16
Leakage
30.7 38.4 46.1 53.7 61.4
Distance
(in.)
18
20
22
24
26
28
30
32
36
40
44
46
48
50
69.1 76.8 84.4 92.1 99.8 107.5 115.2 122.8 138.2 153.5 168.9 176.6 184.3 192
52
54
56
199.6 207.3 215
58
60
222.7 230.3
Arrester
Rating
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
*
*
*
*
O
O
O
*
*
O
O
O
O
*
*
TD235013EN-16 www.cooperpower.com
O
O
O
O
*
*
O
O
O
O
O
*
*
*
O
O
O
O
O
O
O
O
O
O
O
O
O
*
*
O
O
O
O
O
O
O
*
O
O
O
O
O
O
*
*
O
O
O
O
O
O
*
O
O
O
O
O
O
*
O
*
O
O
O
O
*
O
O
*
O
O
O
*
O
O
O
O
*
O
O
O
O
O
O
O
O
O
*
O
O
O
O
O
O
O
O
O
O
O
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Table 10. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed Station-Class Arresters (continued)
1
U
2
3
A
4
A
5
6
7
8
9
10
11
12
A
13
14
15
16
17
18
14 = Line Terminal Options
Optional Offering-Select A
Standard Offering-Select 4
TERMINAL
CLAMP–
STAINLESS
STEEL
3.50”
REF
WASHERS–
GALVANIZED
STEEL
NUT MATERIAL–
GALVANIZED
STEEL NUT
THREAD –.51”
1.75” SQ
3.50”
REF
1.75”
REF
BOLT
MATERIAL–
GALVANIZED
STEEL
4.72”
REF
4.25”
BOLT
THREAD–.51”
4.25”
4.72”
TIN PLATED
ALUMINUM
BRONZE
ALLOY TIN PLATED
SILICON BRONZE
TIN PLATED
COPPER
ALLOY
ALUMINUM
TERMINAL MATERIAL–ALUMINUM
NEMA® Four-hole Pad and Stainless Terminal Clamp
Accepts copper or aluminum conductors from .16” dia.
(#6) to 1.15” dia. (1000 MCM).
(Top illustration shows terminal clamp, bottom illustration
shows terminal clamp removed)
NEMA® Four-hole Pad and Two Eyebolts
Accepts conductors 1/0 SOL-500 MCM
(Top illustration shows two eyebolts, bottom illustration
shows two eyebolts removed)
1.97”
1.97”
1.57”
.69”
.51”
1.97”
1.38”
4.25”
1.57”
10 Hole Typ 4 PL
3.50”
2.75”
NEMA® Four-hole Pad is used in Standard
Offering 4 and Optional Offering A.
Consult factory for alternate terminal options.
Optional Offering-Select 1
TIN PLATED
THREAD –.51” BRASS NUT
ALUMINUM
BRONZE
1.65”
Optional Offering-Select 5
TIN
PLATED
BRASS
NUT
1.18" (30 mm)
3.19”
STAINLESS
STEEL LOCK
WASHER
TIN
PLATED
BRASS
COPPER ALLOY
1.65”
STAINLESS THREAD–.63”
STEEL LOCK
WASHER
Eyebolt Connector
Accepts copper or aluminum conductors from
.16” dia. (#6) up to .57” dia. (250 MCM)
Wire Clamp
Accepts copper or aluminum conductors
from .16" dia. (#6) to .575" dia. (250 MCM)
(Cubicle Mount)
For use with Option Code “B” digit 16
Cubicle Mount US Type (3-36 kV)
www.cooperpower.com TD235013EN-17
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Table 10. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed Station-Class Arresters (continued)
1
U
2
3
A
4
A
5
6
7
8
9
10
11
A
12
13
14
15
16
17
18
15 = Earth Terminal Options
Optional Offering-Select 1
Standard Offering-Select 5
2.52”
ALL NUTS,
BOLTS AND
WASHERSGALVANIZED
STEEL
BOLT –.51”
STAINLESS STEEL
NUT –.51” STAINLESS
STEEL
TERMINAL–
STAINLESS
STEEL
LOCK WASHER –.51”
STAINLESS STEEL
91 mm
3.58”
TERMINAL
CLAMPSTAINLESS
STEEL
WIRE CLAMPS –
STAINLESS STEEL
TERMINALGALVANIZED
STEEL
Clamp Style Connector
Accepts copper or aluminum
conductors from .16” dia. (#6) to
.575” dia. (250 MCM)
NEMA® Four-hole Pad
Accepts copper or aluminum conductors
from .16” dia. (#6) to .82” dia. (500 MCM)
Optional Offering-Select 9
EYEBOLT BODY–TIN
PLATED BRASS
WASHERS–.62”
STAINLESS STEEL
Optional Offering-Select B
EYEBOLT–.63”
TIN PLATED
ALUMINUM
BRONZE
2.01”
NUT MATERIAL–
STAINLESS STEEL
1.18" (30 mm)
WASHERS–.63”
STAINLESS STEEL
2.52”
MOUNTING BOLT–.63”
STAINLESS STEEL
Eyebolt Connector
Accepts copper or aluminum conductors
from .16” dia. (#6) to .575” dia. (250 MCM)
Wire Clamp
Accepts copper or aluminum conductors
from .16” dia. (#6) to .575” dia. (250 MCM)
(Cubicle Mount)
For use with Option Code “B” digit 16
Cubicle Mount US Type (3-36 kV)
16 = Mounting Arrangement
Standard Offering-Select A
Mounting Base Located on Bottom
Optional-Select B
No Mounting Base (Cubicle Mount)
(US Type 3-36 kV)
17 =“1” - Nameplate for Standard or Suspension Mount
“2” - Nameplate for Cubicle Mount (US Type 3-36 kV) Option Code “B” for digit 16
18 = “1” - Cardboard Packaging
TD235013EN-18 www.cooperpower.com
Optional-Select C
Mounting Base Located on Top
(Suspension Mount)
UltraSIL polymer-housed VariSTAR station-class surge arresters
Technical Data TD235013EN
Effective September 2014
Figure 6. Detail of base nameplate.
Figure 7. Detail of unit nameplate on base of arrester section.
Nameplate information
A stainless steel nameplate is at­tached to the base of every UltraSIL
Polymer-Housed Type US, UH, and UX Arrester. The arrester catalog
number, serial number, year of manufacture, duty-cycle rating,
MCOV ratings, and pressure relief rating are among the details
provided on the nameplate. For multi-unit arresters above 120 kV, an
additional unit nameplate is provided on the base of the arrester unit
section as shown in Figure 7. See Figure 6 for an example of a base
nameplate.
Additional information
•
S235-103-1
UltraSIL Polymer-Housed VariSTAR Station-Class Surge Arrester Installation and Maintenance Instructions.
•
CP1122
UltraSIL Polymer-Housed VariSTAR Type US, UH, and UX Station-Class Surge Arresters Certified Test Report.
www.cooperpower.com TD235013EN-19
Technical Data TD235013EN
UltraSIL polymer-housed VariSTAR station-class surge arresters
Effective September 2014
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235013EN
TD235013EN-20
Eaton, Cooper Power Systems, VariSTAR
and UltraSIL are valuable trademarks of Eaton
in the U.S. and other countries. You are not
permitted to use these trademarks without the
prior written consent of Eaton.
IEEE is a registered trademark of the Institute of
Electrical and Electronics Engineers, Inc.
IEEE Std C62.11™-2005, IEEE Std C62.22™2009 and IEEE Std 62.11a™-2008 standards
are trademarks of the Institute of Electrical
and Electronics Engineers, Inc., (IEEE).
This publication/product is not endorsed or
approved by the IEEE.
For Eaton’s Cooper Power
Systems VariSTAR stationclass surge arrester product
information call
1-877-277-4636 or visit:
www.cooperpower.com.
Technical Data TD235014EN
Effective September 2014
Supersedes 235-104, December 2013
UltraSIL™ polymer-housed
VariSTAR™ UXL high-strength
station-class surge arresters
General
Eaton’s Cooper Power Systems has set a new standard of excellence
for polymer-housed station-class surge arresters. Enhancements in
arrester design allow Eaton’s Cooper Power Systems to offer highstrength station-class arresters that include increased cantilever
strength of up to 92,000 in-lbs with improved energy handling capability
in ratings up to 400 kV. The UltraSIL™ Polymer-Housed VariSTAR™ UXL
High-Strength Station-Class Surge Arrester incorporates the industry
recognized superior silicone rubber housing with a unique high creep
alternating shed profile designed to withstand the most extreme
environments. The “standard” silicone rubber housing is designed with
a minimum specific creepage distance of 31 mm/kV L-L, which meets
category IV (Very Heavy) pollution level according to the IEC standard.
This housing is applied over a gapless MOV internal design.
Eaton’s Cooper Power Systems UXL high-strength arresters meet or
exceed the requirements of IEEE Std C62.11™-2012 standard.
TD235014EN-1
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Table 1. UXL High-Strength Arrester Ratings
and Characteristics
1” STUD
UltraSIL SILICONE
RUBBER HOUSING
ALUMINUM
ELECTRODE
FIBERGLASS
REINFORCED EPOXY
COMPOSITE
MOV DISKS
ALUMINUM
ELECTRODE
Arrester Characteristic
Rating
Arrester Voltage Ratings (kV)
Double Impulse Discharge Energy
Rating
UXL (3-360 kV)
System Frequency (Hz)
Impulse Classifying Current (kA)
High Current
Withstand** (kA)
Pressure Relief Rating
(kA rms sym.)
3-360
15 kJ/kV of MCOV*
50/60
10
Cantilever Strength (in-Ibs)
Ultimate MDCLStatic***
UXLB (3-360 kV)
UXLC (132-360 kV)
80,000
92,000
100
63
32,000
36,800
* Meets Class H energy levels per IEEE Std C62.11™-2012 standard
** High current, short duration withstand (100 kA, 4/10 µs)
*** Maximum design cantilever load — static or maximum working
load is 40% of the ultimate.
ALUMINUM ALLOY
MOUNTING BASE
STAINLESS STEEL
NAMEPLATE
Figure 1. Illustration of 10 kV UltraSIL Polymer-Housed VariSTAR UXL High-Strength
Station-Class Arrester.
Construction
Features
The unique construction of UltraSIL polymer-housed UXL arresters
begins with world class Metal Oxide Varistor (MOV) disks
produced at our dedicated manufacturing facility in Olean, NY. By
manufacturing our own disks we maintain a strict quality control over
the entire pro­duction process, from initial raw material inspection
to final physical and electrical testing of each disk. In addition, by
controlling the manufacturing process of both disks and arresters,
we achieve the optimal combination. Eaton’s Cooper Power Systems
produces MOV disks of unsurpassed quality through continuous
improvements in disk formulation and manufacturing technology.
The end result is a long history of in-service use with outstanding
durability and protective capability.
The UltraSIL silicone rubber housing was selected for its superior
insula­tion performance as compared to other polymeric housing
materials. Long term environmental testing has verified the lifetime
performance advantage that silicone rubber provides.
Arrester production begins by stacking glass-collared MOV disks in
series with aluminum end electrodes. Our proprietary process wraps
the assembly with a high-strength woven fiberglass-reinforced
epoxy composite. When cured, the arrester module is capable of
withstanding extreme electrical and cantilever load conditions.
The UltraSIL silicone rubber housing utilizes an inter­ference fit and
is bonded onto the internal module to form a solid, void-free, highdielectric strength insulation system. Once the housing is in place,
each arrester must pass a strict series of electrical tests to insure
the highest level of in-service performance.
The silicone rubber housing results in lighter weight than similarly
rated porcelain-housed arresters. The silicone rubber housing is less
sensitive to physical damage than porcelain. Also, when compared
to other polymeric housing materials, silicone rubber generates
significantly lower external power losses under contaminated
conditions.
Independent laboratory tests have verified the superior water
repellent behavior of silicone rubber, which is responsible for the
lower external power losses, higher resistance to UV degradation
and surface tracking, superior performance in contaminated
environments, and other important insulating properties. Also,
UltraSIL silicone rubber has been proven not to support biological
growth and is non-flammable.
The basic silicone rubber-housed arrester can be customized with
a variety of terminal and mounting options which allow users to
select the features that meet their application needs. Customers
who require longer creepage housings can easily select a different
housing option through the catalog numbering system. See pages
8-9 for a complete list of available options.
Operation
The operation of the UXL high-strength arrester is typical of gapless
metal oxide arresters. During steady-state conditions, line-to-ground
voltage is applied con­tinuously between the line and ground terminals
of the arrester. When surges occur, the arrester immediately limits,
or clamps, the overvoltage condition by conducting the surge
current to ground. After passage of the surge, the arrester returns
to its initial state, conducting minimal leakage current. This minimal
leakage current (which is primarily capacitive, with a small resistive
component) can be tolerated on a continuing basis.
UXL high-strength arresters easily surpass the minimum fault current
withstand requirements for station-class arresters as defined in IEEE
Std C62.11™-2012 standard (40 kA). These arresters have been tested
and shown to withstand fault currents of 63 kA. During these tests,
the silicone rubber housing ruptures without expelling internal parts.
TD235014EN-2 www.cooperpower.com
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
UXL high-strength arresters are ideal for protection against repeated
high energy switching surges and provide reliable protection for
substation equipment, capacitor banks, multiple lines, and cable
circuits. They are also ideal for applications where lighter weight and
shorter heights (when compared to porcelain-housed arresters) are
critical.
Design testing
The housing, internal components, and hardware of an arrester must
work together as a system. This system must stand up to years of
service while being subjected to a wide range of environmental and
electrical stresses. To ensure a superior level of performance, both
arrester components and finished arresters have been subjected
to a series of tests that accurately represents years of exposure to
actual field conditions. This testing far exceeds the requirements of
industry standards.
UXL high-strength arresters has also met or exceeded all
requirements for station-class arresters as defined by IEEE Std
C62.11™-2012 standard. A certified test report is available upon
request. For a copy, please order Eaton’s Cooper Power Systems
document CP1313.
Production tests
Eaton’s Cooper Power Systems has implemented a complete
production test program to ensure a quality product. Each MOV disk
is subjected to a series of electrical tests to maintain quality. We
also perform additional tests on every MOV disk batch. Listed below
are the tests performed on the MOV disks:
•
100% Physical Inspection
•
100% Discharge Voltage Test
•
100% Vref at Iref
•
100% Watt Loss Measured at 1.05 x MCOV
•
100% Transmission Line Discharge Energy Test
•
Batch High-Current, Short-Duration Test
•
Batch Thermal Stability Test
•
Batch Aging Test
Effective September 2014
Table 2. Arrester Ratings Commonly Used on Three-Phase
Systems
System Voltages L-L (kV)
Arrester Ratings (kV)
Nominal
Max
Grounded
Circuits
High-Impedance/
Ungrounded
Circuits
3.3
3.7
3
–
6.6
7.3
6
9
10.0
11.5
9
12-15
11.0
12.0
9-10
12-15
16.4
18.0
15
18-21
22.0
24.0
18-21
24-27
33.0
36.3
27-30
36.39
47.0
52.0
39-48
54-60
66.0
72.0
54-60
66-84
91.0
100
78-84
90-96
110
123
96-108
120-138
132
145
108-120
132-144
155
170
132-144
162-172
220
245
180-198
204-240
275
300
216-240
258-294
330
362
258-288
294-360
400
420
312-360
–
Each fully assembled UXL high-strength arrester must also pass the
following production tests:
•
100% Physical Inspection
•
100% Vref Test
•
100% Watt Loss Test
•
100% Partial Discharge Inception Voltage Test
General application recommendations
The rating of an arrester is the maximum power-frequency lineto-ground voltage at which the arrester is designed to pass an
operating duty-cycle test (as defined in IEEE Std C62.11™-2012
standard). Table 2 provides a general application guide for the
selection of the proper arrester rating for a given system voltage
and grounding configurations as outlined in IEEE Std C62.22™2009 standard, which is the application guide for metal oxide surge
arresters.
Under fault conditions and other system anomalies, higher than
normal voltages can be imposed upon an arrester. With an improper
arrester selection, these abnormal system voltages can cause an
arrester to fail. To help ensure that the proper arrester is selected,
Eaton’s Cooper Power Systems application engineers are available to
make recommendations.
www.cooperpower.com TD235014EN-3
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
The following information is normally required:
Mounting information
1. Maximum system operating voltage.
The standard base of the UXL high-strength arrester is designed for
mounting on 8.75” to 10” diameter bolt circle patterns. The three
slotted mounting holes are spaced 120° from each other and are
designed to handle 0.5” diameter bolts. Mounting hardware (bolts,
nuts, and washers) are not in­cluded with the arrester. See Figure 3
for mounting base details. An inherently strong design allows these
arresters to be mounted in a variety of ways. They can be mounted
vertically with attachment at the base, suspension (underhung)
mounted, or horizontally mounted through 240 kV. The mounting
arrangement options are shown in Table 9, (on Page 14) digit 16.
2. System grounding conditions;
A. For four-wire circuits, grounding conditions depend upon
whether the system is multi-grounded, whether it has
a neutral impedance and whether common primary and
secondary neutrals are used.
B. For three-wire circuits, grounding conditions depend upon
whether the system is solidly grounded at the source,
grounded through neutral impedance at the source
transformers or ungrounded.
3. Available Fault Current.
4. Maximum line-to-ground voltage and overvoltage duration during
fault conditions.
(3) 0.56” x 1.18”
MOUNTING SLOTS
Ø8.75” —
Ø10.00”
BOLT
CIRCLE
Contact your Eaton’s Cooper Power Systems representative to have
your individual system application needs reviewed.
THICKNESS
OF
MOUNTING
FEET IS 1.25”
(31.75 mm)
Temporary overvoltage (TOV) withstand
ability
The UXL high-strength arrester’s ability to withstand 60 Hz
overvoltage conditions (TOVs) is shown in Figure 2. The graph
illustrates the time an arrester can survive a voltage, and recover,
without going into thermal runaway, for a given voltage magnitude
(expressed in Per Unit of arrester MCOV).
The graphs in Figure 2 illustrate TOV withstand ability, with and without prior duty. The prior duty curve is based upon absorption of rated
energy (Refer to Table 1 — Double Impulse Rating) immediately preceding application of the overvoltage.
1.80” REF
120° TYPICAL
Figure 3. Mounting base details.
1.600
Voltage (per unit COV)
1.500
Ordering information
1.486
1.427
1.400
1.417
1.358
1.348
1.300
1.289
1.279
1.220
1.200
1.210
1.151
1.100
1.141
1.082
1.000
0.1
1
10
100
1000
Time (sec)
Figure 2. Temporary overvoltage curve – 60° ambient
temperature.
TD235014EN-4 www.cooperpower.com
10000
Eaton’s Cooper Power Systems offers other options that allow
customers to select specific features they desire. Options on
housing sizes (creepage length), hardware, and mounting options
are available and defined in Table 9. This table allows customers
who prefer options different from those in our standard Table 8
configuration to develop a catalog number which provides the unique
features they desire. For additional assistance please contact your
Cooper Power Systems sales representative.
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Protective characteristics
All UltraSIL polymer-housed UXL high-strength arresters provide
excellent overvoltage protection for electrical equipment. The
specific protective characteristics are shown in Table 3 below.
Table 3. Protective Characteristics of the UltraSIL Polymer-Housed UXL Arrester
Arrester
Rating
(kV, rms)
Arrester
MCOV (kV
rms)
TOV*
1 Sec
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
258
264
276
288
312
330
336
360
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27.5
29
31.5
34
36.5
39
42
48
53
57
62
68
72
76
84
98
106
111
115
130
131
140
144
152
160
165
174
180
190
209
212
220
230
245
267
272
289
3.5
6.9
10.4
11.4
13.9
17.2
20.8
23.1
26.5
29.9
33.1
37.3
39.4
42.8
46.2
49.6
53
57
65.2
72
77.4
84.2
92.3
97.8
103.2
114.1
133.1
143.9
150.7
156.2
176.5
177.9
190.1
195.6
206.4
217.3
224.1
236.3
244.4
258
283.8
287.9
298.8
312.3
332.7
362.6
369.4
392.5
Maximum Discharge Voltage (kV Crest)
8/20 µs Current Wave
Switching Surge Protective Level
(kV Crest)
10 Sec
Front-of-wave
Protective
Level**
(kV Crest)
1.5 kA
3 kA
5 kA
10 kA
20 kA
40 kA
125 A
250 A
500 A***
1000 A
3.3
6.6
9.9
10.8
13.1
16.4
19.7
21.9
25.1
28.4
31.5
35.4
37.4
40.6
43.8
47
50.3
54.1
61.9
68.3
73.5
79.9
87.7
92.8
98
108.3
126.3
136.6
143.1
148.2
167.6
168.9
180.5
185.6
195.9
206.2
212.7
224.3
232
244.9
269.4
273.3
283.6
296.5
315.8
344.2
350.6
372.5
7.7
15.3
22.5
24.7
30
37.3
45
50
57.3
64.7
71.7
80.8
85.2
92.6
99.9
108
115
124
141
156
168
183
200
212
224
247
288
312
326
338
382
385
412
423
447
470
485
512
529
558
614
623
647
676
720
758
820
849
6.2
12.5
18.4
20.2
24.5
30.4
36.7
40.7
46.7
52.7
58.4
65.8
69.4
75.4
81.4
87.4
93.4
101
115
127
137
149
163
173
182
201
235
254
266
276
312
314
335
345
364
383
395
417
431
455
501
508
527
551
587
618
668
692
6.5
13
19.2
21.1
25.6
31.9
38.4
42.6
48.9
55.2
61.2
68.9
72.7
79
85.2
91.5
97.7
106
121
133
143
156
171
181
191
211
246
266
279
289
326
329
351
361
381
401
414
436
451
476
524
532
552
577
614
647
699
724
6.8
13.5
20
21.9
26.6
33.1
39.9
44.3
50.8
57.3
63.6
71.6
75.5
82
88.6
95.1
102
110
125
138
149
162
178
188
198
219
256
276
289
300
339
342
365
375
396
417
430
453
469
495
545
552
573
599
638
672
727
753
7.3
14.6
21.5
23.6
28.7
35.7
43
47.7
54.8
61.8
68.5
77.2
81.4
88.4
95.4
103
110
118
135
149
160
174
191
202
214
236
275
298
312
323
365
368
393
404
427
449
463
489
505
533
587
595
618
646
688
724
783
811
7.8
15.6
23
25.2
30.6
38.1
45.9
51
58.5
66
73.2
82.5
87
94.5
102
110
117
126
144
159
171
186
204
216
228
252
294
318
333
345
390
393
420
432
456
480
495
522
540
570
627
636
660
690
735
774
837
867
8.6
17.2
25.3
27.8
33.8
42
50.6
56.2
64.5
72.7
80.7
90.9
95.9
105
113
121
129
139
159
176
189
205
225
238
252
278
324
351
367
380
430
433
463
476
503
529
546
575
595
628
691
701
727
760
810
853
922
955
5.5
11
16.2
17.8
21.7
27
32.4
36
41.3
46.6
51.7
58.3
61.5
66.8
72
77.4
82.6
89
102
113
121
132
144
153
161
178
208
225
236
244
276
278
297
305
322
339
350
369
382
403
443
449
466
488
519
547
591
613
5.7
11.3
16.6
18.3
22.2
27.6
33.2
36.9
42.3
47.8
53
59.7
62.9
68.4
73.8
79.2
84.6
91.1
105
115
124
135
148
157
165
183
213
230
241
250
282
285
304
313
330
347
358
378
391
412
454
460
478
499
532
560
605
627
5.8
11.6
17.1
18.8
22.8
28.4
34.2
38
43.6
49.2
54.5
61.4
64.8
70.4
76
81.6
87.1
93.8
108
119
128
139
152
161
170
188
219
237
248
257
291
293
313
322
340
358
369
389
402
425
467
474
492
514
548
577
623
646
6
12
17.7
19.5
23.6
29.4
35.4
39.3
45.1
50.9
56.4
63.6
67.1
72.9
78.6
84.4
90.2
97.1
111
123
132
144
158
167
176
195
227
246
257
266
301
303
324
333
352
370
382
403
417
440
484
490
509
532
567
597
645
668
* Temporary Overvoltage (TOV) with Prior Duty.
** Based on a 10 kA current impulse that results in a discharge voltage cresting in 0.5 µs.
*** 45-60 µs rise time for a 500 A peak current surge.
www.cooperpower.com TD235014EN-5
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Table 4. Creepage Distances and Insulation Withstand Voltages of UXLB High-Strength Station-Class Surge Arresters
Arrester Rating
(kV, rms)
Arrester MCOV
(kV rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
258
264
276
288
312
330
336
360
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27.5
29
31.5
34
36.5
39
42
48
53
57
62
68
72
76
84
98
106
111
115
130
131
140
144
152
160
165
174
180
190
209
212
220
230
245
267
269
289
Catalog Number
Creepage
Distance
(in)
UXLB003002A1045A11
UXLB006005A1245A11
UXLB009007A1245A11
UXLB010008A1245A11
UXLB012010A1445A11
UXLB015012A1445A11
UXLB018015A1645A11
UXLB021017A1645A11
UXLB024019A1845A11
UXLB027022A1845A11
UXLB030024A2045A11
UXLB033027A2245A11
UXLB036029A2245A11
UXLB039031A2445A11
UXLB042034A2445A11
UXLB045036A2645A11
UXLB048039A2845A11
UXLB054042A2845A11
UXLB060048A3245A11
UXLB066053A3245A11
UXLB072057A4445A11
UXLB078062A4645A11
UXLB084068A4845A11
UXLB090072A5045A11
UXLB096076A5245A11
UXLB108084A5645A11
UXLB120098A6445A11
UXLB132106A6445A11
UXLB138111A8045A11
UXLB144115A8045A11
UXLB162130A8645A11
UXLB168131A8645A11
UXLB172140A9245A11
UXLB180144AA445A11
UXLB192152AB045A11
UXLB198160AB245A11
UXLB204165AB445A11
UXLB216174AB645A11
UXLB228180AB845A11
UXLB240190AC645A11
UXLB258209AC845A11
UXLB264212AC845A11
UXLB276220AE845A11
UXLB288230AF245A11
UXLB312245AF645A11
UXLB330267AH245A11
UXLB336269AH245A11
UXLB360289AJ845A11
38
46
46
46
54
54
61
61
69
69
77
84
84
92
92
100
108
108
123
123
169
177
184
192
200
215
246
246
307
307
330
330
353
399
422
430
438
445
453
484
614
614
691
706
722
783
783
845
TD235014EN-6 www.cooperpower.com
Strike (in)
1.2/50
Impulse
(kV, crest)
60Hz, dry
60 seconds
(kV, rms)
60Hz, wet
10 seconds
(kV, rms)
Switching
Surge
Impuse
(kV)
Grading
Ring
9.0
10.7
10.7
10.7
12.3
12.3
13.9
13.9
15.4
15.4
17.0
18.5
18.5
20.1
20.1
21
23
23
26
26
37
39
40
42
43
46
53
44
58
58
62
62
67
78
83
85
86
88
89
95
116
116
113
136
137
151
151
163
149
170
170
170
191
191
208
208
232
232
253
274
274
294
294
313
336
336
379
379
548
568
588
607
626
672
758
689
884
884
946
946
1012
1178
1239
1262
1282
1305
1322
1416
1666
1666
1916
1959
2019
2227
2227
2398
90.8
105
105
105
118
118
131
131
143
143
155
169
169
180
180
195
205
205
227
227
338
349
360
375
390
410
454
424
543
543
580
580
612
723
763
773
785
795
809
857
970
970
1131
1153
1175
1312
1312
1402
65.2
83.6
83.6
83.6
97.8
97.8
116
116
125
125
138
154
154
158
158
163
184
184
208
208
308
312
316
321
326
368
416
375
477
477
513
513
551
635
666
687
697
711
717
773
879
879
1015
1039
1063
1172
1172
1271
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
856
856
906
1072
1122
1140
1156
1173
1188
1252
1550
1550
1784
1817
1804
1999
1999
2137
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Table 5. Creepage Distances and Insulation Withstand Voltages of UXLC High-Strength Station-Class Surge Arresters
Strike (in)
1.2/50
Impulse
(kV, crest)
60Hz, dry
60 seconds (kV,
rms)
60Hz, wet
10 seconds
(kV, rms)
Switching
Surge Impuse
(kV)
Grading
Ring
322
61
929
573
501
835
Yes
UXLC138111A8445A11
322
61
929
573
501
835
Yes
UXLC144115A8645A11
330
62
948
588
506
851
Yes
130
UXLC162130A9045A11
345
66
991
610
537
885
Yes
131
UXLC168131A9045A11
345
66
991
610
537
885
Yes
172
140
UXLC172140AB045A11
422
83
1246
763
673
1118
Yes
180
144
UXLC180144AB245A11
429
84
1261
783
669
1133
Yes
192
152
UXLC192152AB645A11
445
87
1304
805
700
1167
Yes
198
160
UXLC198160AC045A11
460
90
1347
827
731
1201
Yes
204
165
UXLC204165AC045A11
460
90
1347
827
731
1201
Yes
216
174
UXLC216174AC245A11
468
92
1370
837
745
1218
Yes
228
180
UXLC228180AC045A11
460
90
1347
827
731
1201
Yes
240
190
UXLC240190AC645A11
483
95
1416
857
773
1252
Yes
258
209
UXLC258209AE845A11
690
133
1914
1130
1009
1782
Yes
264
212
UXLC264212AF045A11
698
134
1933
1145
1014
1798
Yes
276
220
UXLC276220AF445A11
714
138
1976
1167
1045
1832
Yes
288
230
UXLC288230AF645A11
721
139
1999
1177
1059
1849
Yes
312
245
UXLC312245AH645A11
798
154
2271
1330
1195
2036
Yes
330
267
UXLC330267AJ445A11
829
160
2352
1382
1236
2102
Yes
336
269
UXLC336269AJ645A11
836
162
2375
1392
1257
2120
Yes
360
289
UXLC360289AK245A11
859
167
2441
1424
1295
2170
Yes
Arrester
Rating (kV,
rms)
Arrester
MCOV (kV
rms)
132
Catalog Number
Creepage
Distance (in)
106
UXLC132106A8445A11
138
111
144
115
162
168
www.cooperpower.com TD235014EN-7
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Table 6. Dimensions, Clearance Requirements and Weights of UXLB High-Strength Station-Class Surge Arresters
Arrester Rating
(kV, rms)
Arrester MCOV
(kV rms)
Catalog Number
“Dimension
A (in)
Figure 5
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
258
264
276
288
312
330
336
360
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27.5
29
31.5
34
36.5
39
42
48
53
57
62
68
72
76
84
98
106
111
115
130
131
140
144
152
160
165
174
180
190
209
212
220
230
245
267
269
289
UXLB003002A1045A11
UXLB006005A1245A11
UXLB009007A1245A11
UXLB010008A1245A11
UXLB012010A1445A11
UXLB015012A1445A11
UXLB018015A1645A11
UXLB021017A1645A11
UXLB024019A1845A11
UXLB027022A1845A11
UXLB030024A2045A11
UXLB033027A2245A11
UXLB036029A2245A11
UXLB039031A2445A11
UXLB042034A2445A11
UXLB045036A2645A11
UXLB048039A2845A11
UXLB054042A2845A11
UXLB060048A3245A11
UXLB066053A3245A11
UXLB072057A4445A11
UXLB078062A4645A11
UXLB084068A4845A11
UXLB090072A5045A11
UXLB096076A5245A11
UXLB108084A5645A11
UXLB120098A6445A11
UXLB132106A6445A11
UXLB138111A8045A11
UXLB144115A8045A11
UXLB162130A8645A11
UXLB168131A8645A11
UXLB172140A9245A11
UXLB180144AA445A11
UXLB192152AB045A11
UXLB198160AB245A11
UXLB204165AB445A11
UXLB216174AB645A11
UXLB228180AB845A11
UXLB240190AC645A11
UXLB258209AC845A11
UXLB264212AC845A11
UXLB276220AE845A11
UXLB288230AF245A11
UXLB312245AF645A11
UXLB330267AH245A11
UXLB336269AH245A11
UXLB360289AJ845A11
10.8
12.4
12.4
12.4
13.9
13.9
15.5
15.5
17
17
18.6
20.2
20.2
21.7
21.7
23.3
24.8
24.8
27.9
27.9
37.3
38.8
40.4
41.9
43.5
46.6
52.8
52.8
65.3
65.3
70
70
74.6
84
88.6
90.2
91.8
93.3
94.9
101
128
128
143
146
149
162
162
174
TD235014EN-8 www.cooperpower.com
Dimension D
Diameter (in)
Figure 5
Dimension B
Minimum PhaseTo-Ground
Clearance (in)
Figure 4
Dimenison
C Minimum
Phase-to-Phase
Cearance (in)
Figure 4
Weight(lbs)
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.4
6.5
6.5
6.5
6.6
7
7.5
8.3
8.8
8.9
9.6
10.4
11.3
11.8
12.6
13.4
14.1
14.9
15.8
17.7
19.3
20.5
22
23.9
25.1
26.4
28.9
33.2
43.2
44.7
46
50.6
50.9
53.7
55
57.4
59.9
61.5
64.3
66.1
69.2
83.1
84
86.5
89.6
101
105
105
114
12
12
12
12.1
12.5
13
13.8
14.3
14.4
15.1
15.9
16.8
17.3
18.1
18.9
19.6
20.4
21.3
23.2
24.8
26
27.5
29.4
30.6
31.9
34.4
38.7
56.2
57.7
59
63.6
63.9
66.7
68
70.4
72.9
74.5
77.3
79.1
82.2
104
105
108
111
128
132
133
142
22
24.3
26.5
26.5
26.5
28.7
31
31
33
33
35
38
38
42
42
44
46
46
51
53
68
71
73
75
77
84
99
99
119
119
128
128
137
152
159
161
163
168
170
179
205
205
229
236
245
267
267
287
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Spacing requirements
C
C
B
B
Figure 4 illustrates a three-phase in-line mounting arrangement.
Dimen­sions B and C reference mini­mum phase-to-ground and phaseto-phase distances respectively. These dimensions are listed in
Tables 6 and 7.
B
Figure 4. Three-phase In-line mounting arrangement.
Table 7. Dimensions, Clearance Requirements and Weights of UXLC High-Strength Station-Class Surge Arresters
Dimension D
Diameter (in)
Figure 5
Dimension B
Minimum PhaseTo-Ground
Clearance (in)
Figure 4
Dimenison
C Minimum
Phase-to-Phase
Cearance (in)
Figure 4
Weight(lbs)
Arrester Rating
(kV, rms)
Arrester MCOV
(kV rms)
Catalog Number
“Dimension
A (in)
Figure 5
132
106
UXLC132106A8445A11
68.4
6.4
43.2
56.2
119
138
111
UXLC138111A8445A11
68.4
6.4
44.7
57.7
119
144
115
UXLC144115A8645A11
70
6.4
46
59
121
162
130
UXLC162130A9045A11
73.1
6.4
50.6
63.6
128
168
131
UXLC168131A9045A11
73.1
6.4
50.9
63.9
130
172
140
UXLC172140AB045A11
88.6
6.4
53.7
66.7
152
180
144
UXLC180144AB245A11
90.3
6.4
55
68
154
192
152
UXLC192152AB645A11
93.4
6.4
57.4
70.4
161
198
160
UXLC198160AC045A11
96.5
6.4
59.9
72.9
165
204
165
UXLC204165AC045A11
96.5
6.4
61.5
74.5
165
216
174
UXLC216174AC245A11
98
6.4
64.3
77.3
168
228
180
UXLC228180AC045A11
96.5
6.4
66.1
79.1
168
240
190
UXLC240190AC645A11
101
6.4
69.2
82.2
176
258
209
UXLC258209AE845A11
143
6.4
83.1
104
223
264
212
UXLC264212AF045A11
145
6.4
84
105
225
276
220
UXLC276220AF445A11
148
6.4
86.5
108
232
288
230
UXLC288230AF645A11
149
6.4
89.6
111
238
312
245
UXLC312245AH645A11
165
6.4
101
128
262
330
267
UXLC330267AJ445A11
171
6.4
108
135
273
336
269
UXLC336269AJ645A11
173
6.4
108
136
278
360
289
UXLC360289AK245A11
177
6.4
114
142
287
www.cooperpower.com TD235014EN-9
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Ø42.0”
Ø26.0”
12.0”
3/8”
37.0”
Ø26.0”
Ø26.0
A
12.0”
Ø37.0”
12.0
Ø37.0
Stud Collar Height
Ø55.0”
30.0”
30.0
11.3750”
11.3750
Ø42.0”
Ø42.0
26.0000
3”
Ø26.00”
1”
Base Height
A
A
A
ØD
ØD
ØD
A
ØD
3 - 120 kV
Arrester Rating:
3 - 120 kV
258 - 288 kV
132 - 240 kV
All dimensions are for reference only.
132 - 240 kV
258-288 kV
312-360 kV
Figure 5. Outline drawing of standard UltraSIL Polymer-Housed Station-Class Arresters.
NNote: Dimensions shown in Tables 6 and 7. Arresters are shown without line and ground terminals.
Table 8. Catalog Numbers for Standard Configuration Type UXL Surge Arresters
Arrester Rating
Ur (kV, rms)
Arrester COV Uc
(kV, rms)
UXLB
Arrester
Rating Ur
(kV, rms)
Arrester COV Uc
(kV, rms)
UXLB
3
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
96
2.55
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27.5
29
31.5
34
36.5
39
42
48
53
57
62
68
76
UXLB003002A1045A11
UXLB009007A1245A11
UXLB010008A1245A11
UXLB012010A1445A11
UXLB015012A1445A11
UXLB018015A1645A11
UXLB021017A1645A11
UXLB024019A1845A11
UXLB027022A1845A11
UXLB030024A2045A11
UXLB033027A2245A11
UXLB036029A2245A11
UXLB039031A2445A11
UXLB042034A2445A11
UXLB045036A2645A11
UXLB048039A2845A11
UXLB054042A2845A11
UXLB060048A3245A11
UXLB066053A3245A11
UXLB072057A4445A11
UXLB078062A4645A11
UXLB084068A4845A11
UXLB096076A5245A11
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
258
264
276
288
312
330
336
360
84
98
106
111
115
130
131
140
144
152
160
165
174
180
190
209
212
220
230
245
267
269
289
UXLB108084A5645A11
UXLB120098A6445A11
UXLB132106A6445A11
UXLB138111A8045A11
UXLB144115A8045A11
UXLB162130A8645A11
UXLB168131A8645A11
UXLB172140A9245A11
UXLB180144AA445A11
UXLB192152AB045A11
UXLB198160AB245A11
UXLB204165AB445A11
UXLB216174AB645A11
UXLB228180AB845A11
UXLB240190AC645A11
UXLB258209AC845A11
UXLB264212AC845A11
UXLB276220AE845A11
UXLB288230AF245A11
UXLB312245AF645A11
UXLB330267AH245A11
UXLB336269AH245A11
UXLB360289AJ845A11
TD235014EN-10 www.cooperpower.com
UXLC
Not available below 132kV
UXLC132106A8445A11
UXLC138111A8445A11
UXLC144115A8645A11
UXLC162130A9045A11
UXLC168131A9045A11
UXLC172140AB045A11
UXLC180144AB245A11
UXLC192152AB645A11
UXLC198160AC045A11
UXLC204165AC045A11
UXLC216174AC245A11
UXLC228180AC045A11
UXLC240190AC645A11
UXLC258209AE845A11
UXLC264212AF045A11
UXLC276220AF445A11
UXLC288230AF645A11
UXLC312245AH645A11
UXLC330267AJ445A11
UXLC336269AJ645A11
UXLC360289AK245A11
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Table 9. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed UXL High-Strength Station-Class Arresters
1
U
2
X
3
L
4
5
6
7
8
9
10
11
A
12
13
14
15
16
17
18
Catalog Number Digits:
1 = U (UltraSIL Polymer-Housed Arrester)
2 = X Xtra-High Energy Handling
3 = L High Electrical Build (15 kJ/kV of MCOV, Double Impulse)*
* Reference Catalog 235-103 for alternate electrical builds
4 = B = 80,000 in-lbs Cantilever Strength Design
C = 92,000 in-lbs Cantilever Strength Design (Only available for 132-360 kV)
5 through 10 = Arrester Rating: Duty-cycle (MCOV)
003002 = 3 kV (2.55 kV)*
042034 = 42 kV (34.0 kV)*
132106 = 132 kV (106 kV)
258209 = 258 kV (209 kV)
006005 = 6 kV (5.10 kV)*
045036 = 45 kV (36.5 kV)*
138111 = 138 kV (111 kV)
264212 = 264 kV (212 kV)
009007 = 9 kV (7.65 kV)*
048039 = 48 kV (39.0 kV)*
144115 = 144 kV (115 kV)
276220 = 276 kV (220 kV)
010008 = 10 kV (8.4 kV)*
054042 = 54 kV (42.0 kV)*
150120 = 150 kV (120 kV)
288230 = 288 kV (230 kV)
012010 = 12 kV (10.2 kV)*
060048 = 60 kV (48.0 kV)*
162130 = 162 kV (130) kV
312245 = 312 kV (245kV)
015012 = 15 kV (12.7 kV)*
066053 = 66 kV (53.0 kV)*
168131 = 168 kV (131 kV)
330267 = 330 kV (267kV)
018015 = 18 kV (15.3 kV)*
072057 = 72 kV (57.0 kV)*
172140 = 172 kV (140 kV)
336269 = 336 kV (269 kV)
021017 = 21 kV (17.0 kV)*
078062 = 78 kV (62.0 kV)*
180144 = 180 kV (144 kV)
360289 = 360 kV (289 kV)
024019 = 24 kV (19.5 kV)*
084068 = 84 kV (68.0 kV)*
192152 = 192 kV (152 kV)
027022 = 27 kV (22.0 kV)*
090070 = 90 kV (70.0 kV)*
198160 = 198 kV (160 kV)
030024 = 30 kV (24.4 kV)*
096076 = 96 kV (76.0 kV)*
204165 = 204 kV (165 kV)
033027 = 33 kV (27.0 kV)*
096077 = 96 kV (77.0 kV)*
216174 = 215 kV (174 kV)
036029 = 36 kV (29.0 kV)*
108084 = 108 kV (84.0 kV)*
228180 = 228 kV (180 kV)
039031 = 39 kV (31.5 kV)*
120098 = 120 kV (98.0 kV)*
240190 = 240 kV (190 kV)
* Only available in UXLB configurations
11 = “A” Standard High Creep UltraSIL Polymer-Housing
www.cooperpower.com TD235014EN-11
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Table 9. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed UXL High-Strength Station-Class Arresters
(continued)
1
2
U
X
3
L
Digits
12 & 13
5
10
12
6
14
7
16
8
18
9
20
10
22
11
A
24
26
12
28
13
32
14
44
15
46
16
50
17
52
56
18
64
245.7
215
199.6
191.9
176.6
168.9
122.8
107.5
99.8
92.1
84.4
76.8
69.1
61.4
53.7
46.1
Arrester
Rating
38.4
Leakage
Distance Type
(in)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
4
*
*
*
*
*
*
*
*
*
*
*
*
*
UXLB
TD235014EN-12 www.cooperpower.com
*
*
*
*
*
*
*
*
*
*
*
*
*
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Table 9. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed UXL High-Strength Station-Class Arresters
(continued)
1
2
U
X
3
B8
C0
C2
C6
C8
E8
F0
F2
F4
F6
H2
H6
J4
829.1
J6
J8
K2
859.8
B6
844.5
B4
18
836.8
B2
798.4
360
B0
783.1
336
A4
721.7
330
92
714
312
90
706.3
288
86
698.6
276
84
690.9
264
80
614.2
258
64
483.7
240
17
468.3
228
16
460.6
216
15
453
204
14
445.3
198
13
437.6
192
12
429.9
180
A
422.2
172
11
399.2
168
10
353.2
162
9
345.5
144
8
330.1
138
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
UXLB
UXLC
7
322.4
Arrester
Rating
6
307.1
Leakage
Distance Type
(in)
5
245.7
Digits
12 & 13
132
4
L
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
www.cooperpower.com TD235014EN-13
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Table 9. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed UXL High-Strength Station-Class Arresters
(continued)
1
U
2
X
3
L
4
5
6
7
8
9
10
11
12
A
13
14
15
16
17
18
14 = Line Terminal Options
Standard Offering-Select 4
TERMINAL
CLAMP–
STAINLESS
STEEL
3.50”
REF
Optional Offering-Select A
WASHERS–
GALVANIZED
STEEL
NUT MATERIAL–
GALVANIZED
STEEL NUT
THREAD –.51”
1.75” SQ
BOLT
MATERIAL–
GALVANIZED
STEEL
3.50”
REF
1.75”
REF
4.72”
REF
4.25”
BOLT
THREAD–.51”
4.25”
4.72”
TIN PLATED
ALUMINUM
BRONZE
ALLOY TIN PLATED
SILICON BRONZE
TIN PLATED
COPPER
ALLOY
ALUMINUM
TERMINAL MATERIAL–ALUMINUM
NEMA® Four-hole Pad and Stainless Terminal Clamp
Accepts copper or aluminum conductors from .16” dia.
(#6) to 1.15” dia. (1000 MCM).
(Top illustration shows terminal clamp, bottom illustration
shows terminal clamp removed)
NEMA® Four-hole Pad and Two Eyebolts
Accepts conductors 1/0 SOL-500 MCM
(Top illustration shows two eyebolts, bottom illustration
shows two eyebolts removed)
1.97”
1.97”
1.57”
.69”
.51”
1.97”
1.38”
4.25”
1.57”
10 Hole Typ 4 PL
3.50”
2.75”
High strength, high ampacity, cast aluminum NEMA® Four-hold pad.
Used in Standard Offering 4 and Optional Offering A.
Consult factory for alternate terminal options.
Optional Offering-Select 1
TIN PLATED
THREAD–.51” BRASS NUT
ALUMINUM
BRONZE
1.65”
TIN
PLATED
BRASS
NUT
3.19”
STAINLESS
STEEL LOCK
WASHER
TIN
PLATED
BRASS
COPPER ALLOY
1.65”
STAINLESS THREAD–.63”
STEEL LOCK
WASHER
Eyebolt Connector
Accepts copper or aluminum conductors from
.16” dia. (#6) up to .57” dia. (250 MCM)
TD235014EN-14 www.cooperpower.com
Technical Data TD235014EN
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Effective September 2014
Table 9. UltraQUIK Catalog Numbering System for UltraSIL Polymer-Housed UXL High-Strength Station-Class Arresters
(continued)
1
U
2
X
3
L
4
5
6
7
8
9
10
11
12
A
13
14
15
16
17
18
15 = Earth Terminal Options
Optional Offering-Select 1
Standard Offering-Select 5
2.52”
ALL NUTS,
BOLTS AND
WASHERSGALVANIZED
STEEL
TERMINAL–
STAINLESS
STEEL
LOCK WASHER–.51”
STAINLESS STEEL
91 mm
3.58”
TERMINAL
CLAMPSTAINLESS
STEEL
BOLT –.51”
STAINLESS STEEL
NUT –.51” STAINLESS
STEEL
TERMINALGALVANIZED
STEEL
WIRE CLAMPS–
STAINLESS STEEL
Clamp Style Connector
Accepts copper or aluminum
conductors from .16” dia. (#6) to
.575” dia. (250 MCM)
NEMA® Four-hole Pad
Accepts copper or aluminum conductors
from .16” dia. (#6) to .82” dia. (500 MCM)
Optional Offering-Select 9
EYEBOLT BODY–TIN
PLATED BRASS
WASHERS–.62”
STAINLESS STEEL
EYEBOLT–.63”
TIN PLATED
ALUMINUM
BRONZE
2.01”
NUT MATERIAL–
STAINLESS STEEL
WASHERS –.63”
STAINLESS STEEL
2.52”
MOUNTING BOLT –.63”
STAINLESS STEEL
Eyebolt Connector
Accepts copper or aluminum conductors
from .16” dia. (#6) to .575” dia. (250 MCM)
16 = Mounting Arrangement
Standard Offering-Select A
Mounting Base Located on Bottom
Optional-Select C
Mounting Base Located on Top
(Suspension Mount)
17 =“1” - Nameplate for Standard or Suspension Mount
18 = “1” - Cardboard Packaging
“2” - Wood Crating
www.cooperpower.com TD235014EN-15
Technical Data TD235014EN
Effective September 2014
UltraSIL polymer-housed VariSTAR UXL
high-strength station-class surge arresters
Figure 6. Detail of base nameplate.
Figure 7. Detail of unit nameplate on base.
Nameplate information
A stainless steel nameplate is at­tached to the base of every UltraSIL
polymer-housed UXL high-strength arrester. The arrester catalog
number, serial number, year of manufacture, duty-cycle rating,
MCOV ratings, and pressure relief rating are among the details
provided on the nameplate. For multi-unit arresters above 120 kV, an
additional unit nameplate is provided on the base of the arrester unit
section as shown in Figure 7. See Figure 6 for an example of a base
nameplate.
Additional information
•
S235-104-1
UltraSIL Polymer-Housed VariSTAR UXL High-Strength Station-Class Surge Arrester Installation and Maintenance Instructions.
•
CP1313
UltraSIL Polymer-Housed VariSTAR UXL High-
Strength Station-Class Surge Arresters Certified Test Report.
•
B235-11026
Improve System Reliability with High Cantilever Strength and Expanded Overvoltage Protection
•
G235-104-1
UltraSIL Polymer-Housed UXL High-Strength Station-Class Arrester Guideform Specification
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53188
United States
Cooperpower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Publication No. TD235014EN
TD235014EN-16
Eaton, Cooper Power Systems, UltraSIL, and
VariSTAR are valuable trademarks of Eaton
in the U.S. and other countries. You are
not permitted to use the these trademarks
without the prior written consent of Eaton.
IEEE Std C62.22™-2009 and Std C62.11™2012 standards are trademarks of the Institute
of Electrical and Electronics Engineers, Inc.,
(IEEE). This publication is not endorsed or
approved by the IEEE.
For Eaton’s Cooper Power
Systems UXL surge arrester
product information call
1-877-277-4636 or
visit: www.cooperpower.com.
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Business
2300 Badger Drive
Waukesha, WI 53186
United States
CooperPower.com
© 2014 Eaton
All Rights Reserved
Printed in USA
Eaton and Cooper Power Systems are valuable
trademarks of Eaton in the U.S. and other
countries. You are not permitted to use these
trademarks without the prior written consent
of Eaton.
All other trademarks are property
of their respective owners.