SECTION 16709
TRANSIENT VOLTAGE SURGE SUPPRESSION
PART 1 GENERAL
1.01
A.
SUMMARY
Section Includes: Transient Voltage Surge Suppression TVSS)
devices, also known as Surge Protective Devices (SPDs), for
the protection of AC electrical circuits and electronic
equipment from the effects of lightning induced transients,
other externally generated transients, and internally
generated transients.
1.02
REFERENCES
A.
ANSI/IEEE:
1.
2.
3.
4.
B.
C.
C62.33-82(89) Standard
Test
Specifications
for
Varistor Surge-Protective Devices.
C62.41-91
Recommended Practice on Surge Voltages
in Low-Voltage AC Power Circuits.
C62.45-87
Guide on Surge Testing for Equipment
Connected to Low-Voltage AC Power
Circuits.
142-82
Recommended Practice for Grounding of
Industrial and Commercial Power Systems
(IEEE Green Book).
Underwriters Laboratories (UL):
1.
UL 1449
2.
UL 1283
Standard for Safety, Transient Voltage Surge
Suppressors.
Electromagnetic Interference Filters.
National Fire Protection Association (NFPA):
1.
2.
3.
NFPA 70
NFPA 75
National Electrical Code.
Standard for the Protection of Electronic
Computer/Data Producing Equipment.
NFPA 780 Lightning Protection Standard.
D.
Federal Information Processing Standards 94 (FIPS PUB 94).
E.
National Electrical Manufacturer s Association LS-1, 1992
(NEMA LS-1).
1.03
QUALITY ASSURANCE
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16709 - 1
A.
The manufacturer shall submit a written statement
indicating that a factory authorized representative
inspected the installation. The installing contractor shall
submit a checkout memorandum to the manufacturer indicating
the date the equipment was placed into service and the
actual method of installation. Submit three copies to the
specifying engineer.
B.
All SPDs for service entrance, distribution, and branch
circuit protection within a facility shall be provided by a
single manufacturer.
1.04
WARRANTY
A.
The SPD and supporting components shall be guaranteed by
the manufacturer to be free of defects in material and
workmanship for a period of 5 years from the date of
substantial completion of service and activation of the
system to which the suppressor is attached.
B.
An SPD that shows evidence of failure or incorrect
operation during the warranty period shall be repaired or
replaced at no expense to the Board including labor and
materials. Since "Acts of Nature" or similar statements
typically include the threat of lightning to which the SPD
shall be exposed, any such clause limiting warranty
responsibility
in
the
general
conditions
of
this
specification shall not apply to this section. The warranty
shall cover the entire device, not just the modules.
C.
The installation of SPDs in or on electrical distribution
equipment shall in no way compromise or violate equipment
listing, labeling, or warranty of the distribution
equipment.
1.05
A.
SUBMITTALS
The transient voltage surge suppression submittals shall
include, but not be limited to, the following information:
1.
2.
3.
Data for each suppressor type indicating conductor
sizes, conductor types, and connection configuration
and lead lengths.
Manufacturer s certified test data indicating the
ability of the product to meet or exceed requirements
of this specification.
Drawings, with dimensions, indicating SPD mounting
arrangement and lead length configuration, and mounting
arrangement of any optional remote diagnostic equipment
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4.
5.
6.
and assemblies.
List and detail protection systems such as fuses,
disconnecting means, and protective materials.
SPD wiring, bonding, and grounding connections shall be
indicated on the wiring diagrams for each system.
Include installation details demonstrating mechanical
and electrical connections to equipment to be
protected.
If requested, a sample of each suppressor type shall be
submitted for use in testing and evaluation.
PART 2 PRODUCTS
2.01
A.
MANUFACTURERS
Transient Voltage Surge Suppression:
1.
2.
3.
4.
5.
6.
7.
2.02
A.
Advanced Protection Technologies, Clearwater, FL.
Atlantic Scientific.
Diversified Technology Group (DITEK).
EDCO.
Hubbell-Kellems, Milford, CT.
LEA International by Power Logics, Apollo Beach, FL.
Transtector, Hayden Lake, ID.
PERFORMANCE
General:
1.
2.
3.
SPDs shall be listed according to UL 1449 Standard for
Safety, Transient Voltage Surge Suppressors, and UL
1283, Electromagnetic Interference Filters.
There shall be 7 modes of protection: 3-modes (Line-toGround),
3-modes
(Line-to-Neutral),
and
1-mode
(Neutral-to-Ground) for a 3-phase, 4-Wire plus ground
voltage system. (Line-to-Neutral-to-Ground is not an
acceptable substitute for Line-to-Ground).
The UL 1449 Clamping Voltage for the following
configurations shall not exceed the following:
VOLTAGE CONFIGURATION
120/208V
277/480V
4.
L-G
400V
800V
L-N
400V
800V
N-G
400V
800V
The unit shall be UL 1283 Listed as an electromagnetic
interference filter. Standardized insertion loss data
shall be obtained utilizing MIL-STD E220A 50W insertion
loss methodology. Minimum insertion loss shall be as
follows:
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FREQUENCY[MHz]
0.1
1.0
10.0
100.0
5.
6.
7.
8.
B.
INSERTION LOSS[dB]
34
51
54
48
SPDs shall use a separate path to building ground, the
equipment safety ground is not to be used as a
transient ground path.
SPDs shall be constructed using MOV based modules. The
SPD shall have a response time of less than one
nanosecond with 6 inches or less of connected lead
length for any individual protection mode.
Each MOV contained within a current diversion module
shall be individually fused (component level safety
fusing). For the assurance of safety purposes, this
feature shall be a standard design feature and not an
optional feature of the product. The individual
component level fusing shall allow a reduction of
protection rather than an automatic complete loss of
protection.
The maximum continuous operating voltage (MCOV) of all
components shall not be less than 125 percent for a
120V system and 115 percent for 220, 240, 277, and 480V
systems.
Service Entrance Protection:
1.
2.
The SPD for this location shall be referred to as [TVSS
Type 1] on project drawings.
The service entrance TVSS equipment shall meet or
exceed the minimum performance criteria as follows:
a. The SPD shall be by __________, model _________, or
accepted equivalent.
b. The single-impulse surge-current rating shall be a
minimum of _______ Amps/phase.
c. SPD shall be provided with an integral fused
disconnect. Switches shall have a fault withstand
rating equal or greater than the AIC rating of the
equipment being protected. The disconnect switch
shall have an interlocking rotary type safety
switch that turns power off to the device upon
opening the enclosure for safe inspection and/or
module replacement.
d. Visual Indication of proper SPD connection and
operation shall be provided both on the modules and
redundant on the front door of the enclosure. The
indicator lights shall indicate which phase as well
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as which module is operational. SPD that require a
separate diagnostic test kit to determine proper
module operation must be provided.
e. SPD shall incorporate copper bus bars for the surge
current path. Small round wiring or plug-in modules
are not acceptable. Field-replaceable surge-current
diversion modules shall be bolted to the bus bars
for reliable low impedance connections.
f. The enclosure type shall be rated NEMA 12.
C.
Distribution Panel Protection:
1.
2.
The SPD for this location shall be referred to as [TVSS
Type 2] on project drawings.
The distribution panel TVSS equipment shall meet or
exceed the minimum performance criteria as follows:
a. The SPD shall be by ____________, model _______, or
accepted equivalent.
b. The single-impulse surge-current rating shall be a
minimum of ________ Amps/phase.
c. Visual indication of proper SPD connection and
operation shall be provided both on the modules and
redundant on the front door of the enclosure. The
indicator lights shall indicate which phase as well
as which module is operational.
d. SPD shall incorporate copper bus bars for the surge
current path. Small diameter round wiring and the
use of plug-in modules is not acceptable. Surge
current
diversion
modules
shall
use
bolted
connections to the bus bars for reliable low
impedance connections.
e. The enclosure type shall be rated NEMA 12.
D.
Subpanel Protection:
1.
2.
The SPD for this location shall be referred to as [TVSS
Type 3] on project drawings.
The subpanel TVSS equipment shall meet or exceed the
minimum performance criteria as follows:
a. The SPD shall be by ____________, model ________,
or accepted equivalent.
b. SPD shall be of compact non-modular design. The
mounting position of the SPD shall allow a straight
and short lead-length connection between the SPD
and the point of connection in the panelboard.
c. The single-impulse surge-current rating shall be a
minimum of _______ Amps/phase.
d. Visual indication of proper SPD connection and
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operation shall be easily viewed through the front
door of the enclosure. The indicator lights shall
indicate the presence of protection on each phase.
e. The enclosure type shall have minimum rating of
NEMA 12.
PART 3 EXECUTION
3.01
INSTALLATION
A.
The installing contractor shall install the parallel SPD
with short and straight conductors as practically possible.
B.
The contractor shall follow the SPD manufacturer s
recommended installation practice as found in the equipment
installation manual.
C.
The installation shall apply to all applicable codes.
END OF SECTION
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