Cutler Hammer, Div of Eaton Corp EVR010208D208YAS Data Sheet

Electronic voltage regulator

Microprocessor-controlled tap changer
(10–500 kVA, three-phase)

Eaton’s electronic voltage regulator (EVR) reduces
equipment downtime through constant voltage regulation.
It is the ideal solution for equipment or facilities
experiencing brownouts and voltage regulation problems.
The EVR’s patented design offers a high in-rush current,
rapid response and operating advantages over
other manufacturers.

Overview

The appropriate transformer tap
is automatically activated
through a silicon-controlled
rectifier (SCR), maintaining a
tightly regulated output voltage.
Tap changes are initiated within
one electrical cycle—switching
at zero current crossing to
ensure a minimum amount of
noise during tap transitions.

Seven taps per phase are used
for optimal voltage regulation.
Also, the EVR is a low output
impedance, shielded isolation
transformer. As a result of the
low impedance, load changes
do not affect other equipment
connecting the system.

The EVR’s patented design
ensures high efficiency at 97%
and 1000% in-rush capability.
It is equipped with a thermal­magnetic breaker that allows for
proper system coordination to
prevent nuisance trips.

The EVR provides the triple
function of isolation, noise attenu­ation and voltage regulation.
The power transformer supplies
the first two functions. The third
function, voltage regulation, is
supplied by the SCRs connected
to taps on the power transformer.
This sequential tap-changing
design eliminates voltage “over­shoot” from typical electronic
voltage regulators, providing a
seamless transition between the
required power transformer taps.

EVR features

•

±3% voltage output for a
+10/–23% voltage input

•

Power factor—the EVR is not
affected by load power factor

•

Total harmonic distortion
(THD)—the EVR adds less
than 1% THD

•

High Efficiency—97%

•

Wide input frequency range
—the EVR operates within a
broad input frequency range
from 57–63 Hz

•

Seven taps per phase used
to provide optimal voltage
regulation

•

Fail-safe bypass circuit, triple­shielded isolation transformer
and overtemperature
protection

•

Two-year parts and labor
warranty with no startup
required

EVR Specifications

Technology Electronic tap changer
Input voltages 208–600V, three-phase (three-wire)
Input voltage range +10% to –23% of nominal rated input
Output voltage ±3% of nominal
Response time 1/2 cycle
Frequency 60 Hz, ±3%
Efficiency 97% typical
Line regulation Output is ±3% of nominal for input variations of +10% to –23% of nominal
Load regulation Output is maintained within 3% from no load to full load
Correction time Output will be corrected in one step to within ±3% of nominal in 1.5 cycles or less
Harmonic distortion Less than 1.0% THD
Noise attenuation

Common mode
Normal mode

140 dB

3 dB down at 1000 Hz, 40 dB/decade to below 50 Hz with resistive load
Turn-on characteristics When energized, voltage overshoot will be less than 5% of nominal for 1 cycle or less
Overload rating 1000% for 1 cycle and 200% for 10 seconds
Ambient rating –10º to 40ºC
Monitoring Three green LEDs (phase power on indication), one red LED (alert indication)
Surge protection (optional) CVL 100 kA SPD device
Input breaker MCCB rated 125% of full rated current
Bypass switch Normal and bypass selector
Metering (optional) Standard metering—voltage and current

Premium metering—voltage, current, frequency, power, energy,

communications capabilities
Warranty 2-year parts and labor

For custom design, call the
support number below.

Application support

If you are having trouble under­standing a problem related to
power quality, reliability or
energy management, call an
application engineer at
800-809-2772 (Option 1).

EVR ordering guidelines

EVR XXXX XXXX XXXX X X XX

kVA Ratings and Dimensions

kVA Weight BTUs/ Dimensions W x D x H in inches (mm)
(lbs) hr

0010 440 1705 21.00 x 29.00 x 30.00 (533.4 x 736.6 x 762.0)
0015 520 2557 21.00 x 29.00 x 30.00 (533.4 x 736.6 x 762.0)
0025 700 2560 21.00 x 29.00 x 44.00 (533.4 x 736.6 x 1117.6)
0030 720 3090 21.00 x 29.00 x 44.00 (533.4 x 736.6 x 1117.6)
0045 950 4600 45.00 x 29.00 x 44.00 (1143.0 x 736.6 x 1117.6)
0050 950 5525 45.00 x 29.00 x 44.00 (1143.0 x 736.6 x 1117.6)
0075 1100 12,787 45.00 x 29.00 x 44.00 (1143.0 x 736.6 x 1117.6)
0100 1660 17,050 45.00 x 29.00 x 44.00 (1143.0 x 736.6 x 1117.6)
0125 1980 21,312 45.00 x 29.00 x 44.00 (1143.0 x 736.6 x 1117.6)
0150 2200 25,575 45.00 x 29.00 x 44.00 (1143.0 x 736.6 x 1117.6)
0225 3300 23,000 56.00 x 41.50 x 77.00 (1422.4 x 1054.1 x 1955.8)
0300 4000 30,750 56.00 x 41.50 x 77.00 (1422.4 x 1054.1 x 1955.8)
0500 5500 51,250 72.00 x 48.50 x 77.00 (1828.8 x 1231.9 x 1955.8)

Nominal Input Voltage

Delta Input: L, L, L, G

240D = 240
400D = 400
480D = 480
600D = 600

Nominal Output Voltage

Wye Output: L, L, L, N, G

208Y = 120/208
400Y = 230/400
480Y = 277/480
600Y = 347/600

Metering

M1 = Standard metering (IQ 110)
M2 = Premium metering (IQ 220)
Blank = No metering option

Surge Protection

X = No
S = Yes

Frequency

A = 60 Hz
B = 50 Hz

Eaton Corporation

Electrical Sector
1111 Superior Ave.
Cleveland, OH 44114
United States
877-ETN-CARE (877-386-2273)
Eaton.com

© 2010 Eaton Corporation
All Rights Reserved
Printed in USA
Publication No. PA01002001E / Z10470
December 2010

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