Voltage Regulators
Catalog Data
CA225001EN
Effective February 2015
Supersedes 225-10 February 2014
COOPER POWER
SERIES
Single-phase step voltage regulators
General
Eaton's Cooper Power™ series VR-32 singlephase step voltage regulators are tap-changing
autotransformers. They regulate distribution line
voltages from 10% raise (boost) to 10% lower
(buck) in thirty-two steps of approximately 5/8%
each. Voltage ratings are available from 2400 volts
(60 kV BIL) to 34,500 volts (200 kV BIL) for 60 Hz
and 50 Hz systems.
Internal potential winding taps and an external
ratio correction transformer are provided on all
ratings so that each regulator may be applied to
more than one system voltage.
Voltage is maintained within desired limits by
controls that feature superior accuracy, reliability,
and serviceability. Continuity of service is assured
by rugged, service-proven tap-changers and coreand-coil assemblies functioning with the control.
Eaton's Cooper Power series voltage regulators
are available with a full complement of standard
features for routine applications, as well as a full
line of optional accessories for unique applications.
In addition, the regulator offers desirable features
that enhance operation and service.
Smaller kVA sizes are supplied with support lugs
for pole mounting and with substation or platform
tie down provisions. Larger sizes are provided with
substation bases with pad-mounting provisions.
CA225001EN-1
Catalog Data CA225001EN
Single-phase step voltage regulators
Effective February 2015
MOV-Type Series Arrester
Junction Box
Bushing Connectors
Threaded-Stud
Bushing Terminals
Bushings
Hand-Hole Cover
Internal Assembly
Lifting Eyes
Cover
Upper Filter Press Connection
Regulator Lifting Lugs
Position Indicator
Ball-Type
Insulating Fluid Level
Sight Gauge
Shunt-Arrester
Mounting Bosses
Control Cable with QuickDisconnect Plug
Laser-Etched Nameplates (2)
(second nameplate on control
enclosure door)
Lockable Control
Enclosure
Control
Tap-Changer
Motor Capacitor
Automatic
Pressure-Relief Device (not
shown)
Bolt-Down Provisions (4)
Pole-Mounting Bracket
(Units up to 250 kVA.) (not
shown)
Substation Base
(available in units
167 kVA and above)
Ground Pad
Control Ground Boss
Figure 1. External features on the VR-32 voltage regulator.
CA225001EN-2 www.eaton.com/cooperpowerseries
Drain Valve and
Insulating Fluid Sampling Device
Catalog Data CA225001EN
Single-phase step voltage regulators
Effective February 2015
Standard features
––
IEC 61850
A sealed-tank construction allows the use of 65 °C rise insulation
system in 55 °C rise rated designs to provide an additional 12%
capacity above the nameplate rating without loss of normal
insulation life. Additional load capacity is stated on the nameplate,
this ADD-AMP™ feature is available as long as the tap-changer’s
maximum current rating is not exceeded.
––
IEC 60870-5
––
2179
––
MODBUS
The unit construction cover suspends the internal assembly
consisting of the core-and-coil assembly, tap-changer, and the
reactor for ease of inspection and maintenance.
All Eaton's Cooper Power series voltage regulators are manufactured
and tested to the IEEE Std C57.15™-2009 standard.
••
8input/8output universal contacts
••
13.5 Vdc radio power supply
••
13A-Hr control power battery backup
••
48/125 Vdc substation battery power
••
240 V external source
•
CL-7 control
Arresters
•
Tap changer with motor and power supply
Series surge arresters
•
Position indicator with ADD-AMP adjustment
•
Two laser-etched nameplates
•
Lifting lugs
•
Oil drain valve and sampling device
•
Upper filter press connection
All VR-32 voltage regulators are equipped with a bypass arrester
connected across the series winding between the source (S) and
load (L) bushings. This bypass arrester limits the voltage developed
across the series winding during lightning strikes, switching surges
and line faults. A MOV type series surge arrester of 3 kV offers
series winding protection on all regulators except those rated 22 kV
and above, which have a 6 kV MOV-type series surge arrester.
•
Oil sight gauge
Shunt arresters
•
Mounting provisions for shunt arresters
•
High-creep bushings with clamp-type connectors
•
Bolt-down provisions (overhead units)
•
Pole-type mounting brackets (overhead units)
•
Substation base (substation units)
•
External series arrester
A shunt arrester is a recommended accessory on the VR-32 voltage
regulator for protection of the shunt winding. The shunt arrester is
a direct connected arrester mounted on the tank and is connected
between the load bushing and ground. For additional protection, a
shunt arrester may also be installed between the source bushing
and ground. It is recommended that arresters be applied to all nongrounded bushings. Shunt arrester application data is listed in Table 1.
•
Automatic pressure relief device
•
Handhole
•
Control cabinet with removable front panel
•
Ratio correction transformer
•
Conformally coated circuit boards
Optional Accessories
Table 1. Shunt Arrester Application Data
Regulator
Voltage
Rating
2500/4330Y
Nominal System Voltages
(volts)
Delta or
Single-phase
Multi-grounded
Wye
2400
2400/4160
2500
2500/4300
•
Shunt arresters
4160
4160/7200
•
Extra-length control cables
4330
4330/7500
•
Elevating structure
4800/8320
•
4-hole NEMA® H-spades
4800
5000
5000/8660
•
Cooling fans
6900
6900/11950
•
Nameplates in alternate languages or metric units
7200
7200/12470
•
Internal differential potential transformer for complete reverse
power flow w/metering
7620
7620/13200
•
CL-7 control accessories
•• Multi-phase functionality
7970
7970/13800
••
Front panel overlays in alternate languages
••
Serial communications interfaces:
••
––
RS232
––
Fiber Optic - ST
––
RS485
7620/13200Y
11000
11000
––
6
10
15
13800
12470
15
13200
13800
13800/23900
14400/24940Y
14400/24940
19920/34500
18
Fiber Optic - LC, MTRJ, ST, and SC
19920/34500GrdY
Copper - RJ45
22000
22000
27
33000
33000
36
Communications protocols:
––
3
12000
Ethernet communications interfaces:
––
••
5000/8660Y
Recommended
MOV Shunt
Arrester
Ratings
(kV)
27
DNP
www.eaton.com/cooperpowerseries CA225001EN-3
Catalog Data CA225001EN
Single-phase step voltage regulators
Effective February 2015
CL-7 control
•
Configurable data alarms
Source-side voltage calculated from tap position
•
Event record
Internal-external voltage source switch
•
Histograms
•
Automatic/manual control switch
•
Local data retrieval (USB Front Port)
•
Manual raise/lower toggle switch
•
USB data port
Position indicator drag hand reset switch
•
Resident communications protocol (DNP 3.0 and IEC 61850)
Supervisory ON-OFF switch (for use with SCADA)
•
CL-5D or CL-5E communications emulation
Cell phone-style full numeric keypad
•
Programmable I/P (Using logical equations)
•
4x20 character display
•
Alternate configuration settings
•
Multilingual display
•
Multi-phase operation
•
Three date formats
Six-digit operations counter
Construction
•
•
Voltage test terminals
•
External voltage source terminals
•
Neutral indicating dual LEDS
•
Panel-mounted motor fuse
•
Metering-PLUS™ one-touch,grouped-data display feature
•
Tap-position tracking
•
Voltage limiting ("First House Protection")
•
Line drop compensation settings
•
SOFT-ADD-AMP feature with adaptive functionality
•
Duty Cycle Monitor (DCM)
•
TIME-ON-TAP™ tap position tracking feature
•
PMT™ Preventative Maintenance Tapping feature
•
Tap-to-Neutral
With sealed-tank construction, the external oxygen supply is
eliminated from the tank environment. With the use of a 65 °C rise
insulation system and designs with a nameplate rating of 55 °C,
an additional 12% capacity is available from Eaton's Cooper Power
series 32-step regulator without any loss of insulation life.
•
Security override
Quik-Drive™ tap-changers
•
Voltage reduction with three modes
•
Digital metering package (including instantaneous, demand and
time-tagged demand)
•
Data profiler
•
Configurable status alarms
The load tap-changer product offering from Eaton's Cooper Power
series consists of three Quik-Drive™ tap-changers, the most
advanced tap-changers in the industry. Each device is sized for a
specific range of current and voltage applications and share many
similarities in their construction. The primary benefits of Quik-Drive
tap-changers are: direct motor drive for simplicity and reliability; highspeed tap selection for quicker serviceability; and proven mechanical
life (one million operations). Common Quik-Drive tap-changer
features include: neutral light switch; position indicator drive; safety
switches; and logic switches (back-off switches). Quik-Drive load tapchangers meet IEEE® and IEC standards for mechanical, electrical
and thermal performance.
•
•
•
•
•
Figure 2. CL-7 Control.
CA225001EN-4 www.eaton.com/cooperpowerseries
Core and coil assembly
Ease of service is provided by the design of the core-and-coil,
tap-changer, and reactor assembly. The entire assembly is cover
suspended for ease of removal from the tank for inspection or
maintenance.
The coil assembly features an aluminum strip in the series winding
that achieves the optimum in ampere turn balance for exceptional
strength under through-fault conditions.
Grain-oriented steel is used in the core, with a low reluctance lap
joint. The rugged core clamp assembly secures the coil effectively
and positions the core for the optimum in quiet operation and low
core loss.
Figure 3. QD3 Quik-Drive tap-changer
Catalog Data CA225001EN
Single-phase step voltage regulators
Effective February 2015
Position indicator and ADD-AMP capability
Exclusive to Eaton, the uniquely designed position indicator offers
corrosion resistant materials, an oversized viewing area and a reset
solenoid that is replaceable using a single thumbscrew. It is mounted on a junction box on the cover of the regulator, and is directly
connected to the tap-changer by a flexible drive shaft passing through
the junction box and terminal board via a sealing gland.
The indicator face is graduated in steps, numbered 1 through 16 on
each side of zero. Zero designates neutral. Drag hands indicate the
maximum and minimum positions attained during raise and lower
operations. The drag hands are reset around the position indicator hand
by operating the drag hand reset switch on the control front panel.
Figure 4. QD5 Quik-Drive tap-changer
The ADD-AMP feature of VR-32 regulators allows increased current
capacity by reducing the regulation range. This is accomplished by
either setting limit switches in the position indicator (HARD-ADDAMP feature) or enabling the SOFT-ADD-AMP feature to prevent
the tap-changer from traveling beyond a set position in either raise
or lower directions. The limit switches have scales graduated in
percent regulation, and are adjustable to specific values of 5, 6-1/4,
7-1/2, 8-3/4, and 10% regulation to alter the regulation range. The
CL-7 control also allows for an Adaptive ADD-AMP feature which will
automatically change the SOFT ADD-AMP setting based upon the
current readings of the control.
The five possible load current ratings associated with the reduced
regulation ranges are summarized in Tables 4 and 5. At each setting,
a detent stop provides positive adjustment. Settings other than
those with stops are not recommended. The raise and lower limits
need not be the same value except for locations where reverse
power flow is possible.
Figure 5. QD8 Quik-Drive tap-changer
Figure 6. Position Indicator.
www.eaton.com/cooperpowerseries CA225001EN-5
Catalog Data CA225001EN
Single-phase step voltage regulators
Effective February 2015
Table 2. ADD-AMP Capabilities of 50 Hz Ratings
Load Current Ratings (Amperes)1
Rated
Volts
6600
11000
15000
22000
33000
Rated
kVA
33
66
99
132
198
264
330
396
55
110
165
220
330
440
550
660
75
150
225
300
450
600
750
110
220
330
440
660
165
330
495
660
Regulation Range
±10%1
±8 3/4%
±7 1/2%
±6 1/4%
±5%
50
100
150
200
300
400
500
600
50
100
150
200
300
400
500
600
50
100
150
200
300
400
500
50
100
150
200
300
50
100
150
200
55
110
165
220
330
440
550
660
55
110
165
220
330
440
550
660
55
110
165
220
330
440
550
55
110
165
220
330
55
110
165
220
60
120
180
240
360
480
600
668
60
120
180
240
360
480
600
668
60
120
180
240
360
480
600
60
120
180
240
360
60
120
180
240
68
135
203
270
405
540
668
668
68
135
203
270
405
540
668
668
68
135
203
270
405
540
668
68
135
203
270
405
68
135
203
270
80
160
240
320
480
640
668
668
80
160
240
320
480
640
668
668
80
160
240
320
480
640
668
80
160
240
320
480
80
160
240
320
1 Additional 12% increase in capacity is available due to the use of 65 °C winding rise insulation if the tap-changer’s maximum current rating has not been exceeded. For loading in excess of the above values
please your Eaton representative.
CA225001EN-6 www.eaton.com/cooperpowerseries
Catalog Data CA225001EN
Single-phase step voltage regulators
Effective February 2015
Table 3. ADD-AMP Capabilities of 60 Hz Ratings
Rated
Volts
2500
5000
7620
13800
14400
19920
34500
Rated
kVA
Load Current Ratings (Amperes)1
Regulation Range
±10%
±8 3/4%
±7 1/2%
±6 1/4%
±5%
25
50
75
100
125
167
250
333
416.3
25
50
100
125
167
250
333
416.3
38.1
57.2
100
200
300
400
500
668
1000
1332
1665
50
100
200
250
334
500
668
833
50
75
110
220
330
440
550
668
1000
1332
1665
55
110
220
275
367
550
668
833
55
83
120
240
360
480
600
668
1000
1332
1665
60
120
240
300
401
600
668
833
60
90
135
270
405
540
668
668
1000
1332
1665
68
135
270
336
451
668
668
833
68
101
160
320
480
640
668
668
1000
1332
1665
80
160
320
400
534
668
668
833
80
120
138
207
276
414
500
552
667
833
72
144
288
333
416
432
500
576
667
720
833
50
100
200
333
400
500
667
833
50
100
150
200
100
150
200
300
362
400
483
604
50
100
200
231
289
300
347
400
463
500
578
25.1
50.2
100.4
167
200.8
250
335
418
50
100
150
200
110
165
220
330
398
440
531
664
55
110
220
254
318
330
382
440
509
550
636
28
55
110
184
220
275
369
460
55
110
165
220
120
180
240
360
434
480
580
668
60
120
240
277
347
360
416
480
556
600
668
30
60
120
200
240
300
402
502
60
120
180
240
135
203
270
405
489
540
652
668
68
135
270
312
390
405
468
540
625
668
668
34
68
135
225
270
338
452
564
68
135
203
270
160
240
320
480
579
640
668
668
80
160
320
370
462
480
555
640
668
668
668
40
80
160
267
320
400
536
668
80
160
240
320
76.2
114.3
1672
2502
3332
416.32
5002
6672
8332
69
100
150
219/232
328/347
438/464
548/580
656/668
875
1093/1157
50
110
165
241/255
361/382
482/510
603/638
668
875
1093/1157
55
120
180
263/278
394/417
526/557
658/668
668
875
1093/1157
60
135
203
296/313
443/469
591/625
668
668
875
1093/1157
68
160
240
350/370
525/556
668
668
668
875
1093/1157
80
1 Additional 12% increase in capacity is available due to the use of 65 °C winding rise insulation if the tap-changer’s maximum current rating has not been exceeded. For loading in excess of the above values please
contact your Eaton representative.
2 Regulators are capable of carrying current corresponding to rated kVA when operated at 7200 volts.
www.eaton.com/cooperpowerseries CA225001EN-7
Catalog Data CA225001EN
Single-phase step voltage regulators
Effective February 2015
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Division
2300 Badger Drive
Waukesha, WI 53188
United States
Eaton.com/cooperpowerseries
© 2015 Eaton
All Rights Reserved
Printed in USA
Publication No. CA225001EN
CA225001EN-8
Eaton, Cooper Power, ADD-AMP, MeteringPLUS, PMT, TIME-ON-TAP, and Quik-Drive 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 C57.15™-2009 standard is a
trademark 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., (IEEE).
NEMA® is a registered trademark of the
National Electrical Manufacturers Association.
For Eaton’s Cooper Power series step voltage
regulator product information call 1-877-277-4636
or visit: www.eaton.com/cooperpowerseries.