Cutler Hammer, Div of Eaton Corp EPRM Series Current Sensor Catalog
CurrentWatch™ Current Sensors
1
EPRM Series Current Sensor
CA05311003E
October 2007
EPRM Series Current Sensor
CurrentWatch Current Sensors
Contents
Overview . . . . . . . . . . . . . . . . . . . . . 1
Model Selection,
Switches . . . . . . . . . . . . . . . . . . . . 2
Wiring Diagram . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . . . 3
Dimensions . . . . . . . . . . . . . . . . . . . 3
The CurrentWatch EPRM Series from
Eaton’s electrical business is a family
of DIN-rail compatible, splitcurrent sensors. Product features
include a large aperture, switchselectable inputs and outputs and
isolation between primary and secondary circuits. A patented technology eliminates the use of a magnetic
core and protects the sensor against
saturation and damage, which can
occur from continuous exposure to
high currents. Models available up
to 400A and with 0 – 5/0 – 10V DC or
4 – 20 mA outputs as standard.
For typical applications of the
Currentlisting to the right.
Watch™ EPRM Series, see
core
Approvals
UL Listed (Pending)
■
■
C-UL Listed (Pending)
Unless otherwise noted, the
products contained in this
document are not designed
or intended for use in human
safety applications.
AC Current Sensors with Up to 400A Input Range
and Analog Outputs
Housing Design Allows
Direct Mounting to a
DIN Rail
Split-Core Case for
Easy Retrofitting into
Application
Removable
Terminal Block
Cable Guide
Field
Selectable
Inputs and
Outputs to
Reduce
Inventory
Product Features
■
True RMS Output Models Available — True RMS technology is accurate
on distorted waveforms like VFD or SCR outputs
Switch-Selectable Input and Output Ranges — Field selectable input
■
accommodates multiple AC current ranges, while voltage output models
offer choice of 0 – 5V DC or 0 – 10V DC analog outputs
■
Application Versatility — Supports input ranges of up to 400A and standard
50/60 Hz or distorted (VFD, SCR) loads
Agency Approvals and Patented Technology — CE Approved and UL 508
■
Pending with a patented technology that eliminates problems inherent with
magnetic technology such as core saturation
Typical Applications
Motor Control Centers — Motor status monitoring for pumps and
■
conveyors, and can be used with panel meters for inexpensive indication
of motor current status
Automation and Data Logging — Loop-powered units help conserve data
■
logger batteries and 0 – 10V/4 – 20 mA outputs are ideal for remote
monitoring and alarm functions and are compatible with most automation
systems and PLCs
■
VFD Controlled Loads — Monitoring VFD output indicates how the motor
and attached load are operating
Why “True RMS”?
The current waveform of a typical linear load is a pure sine wave. In VFD and
SCR applications, however, output waveforms are rough approximations of a
sine wave. There are numerous spikes and dips in each cycle. Certain models
in the CurrentWatch™ EPRM Series use a mathematical algorithm called
“True RMS” which integrates the actual waveform over time. The output is
the amperage component of the true power (heating value) of the AC current
waveform. True RMS is the only way to accurately measure distorted AC
waveforms.
“noisy” power environments.
For more information visit: www.eaton.com
Select the EPRM Series True RMS models for nonlinear loads in
For Customer Service in the U.S. call 1-877-ETN CARE (386-2273) ,
in Canada call 1-800-268-3578 .
For Application Assistance in the U.S. and Canada
call 1-800-426-9184 .
CA05311003E
October 2007
Model Selection — CurrentWatch EPRM Series
Power Supply Output Signal Current Selectable Range Catalog Number
AC Current Sensors
Split-Core Housings
True RMS Sensors
Split-Core Housings
Stocked product, typical order quantities guaranteed in stock.
24V DC ± 5% Auxiliary Power 0 – 5 or 0 – 10V DC 10, 25 or 50A
24V DC ± 5% Loop-Powered 4 – 20 mA 10, 25 or 50A
24V DC ± 5% Auxiliary Power 0 – 5 or 0 – 10V DC 10, 25 or 50A
24V DC ± 5% Loop-Powered 4 – 20 mA 10, 25 or 50A
CurrentWatch™ Current Sensors
EPRM Series Current Sensor
50, 75 or 100A
100, 150 or 200A
200, 300 or 400A
50, 75 or 100A
100, 150 or 200A
200, 300 or 400A
50, 75 or 100A
100, 150 or 200A
200, 300 or 400A
50, 75 or 100A
100, 150 or 200A
200, 300 or 400A
2
EPRM0510ASP
EPRM1510ASP
EPRM2510ASP
EPRM3510ASP
EPRM0420LSP
EPRM1420LSP
EPRM2420LSP
EPRM3420LSP
EPRMR0510ASP
EPRMR1510ASP
EPRMR2510ASP
EPRMR3510ASP
EPRMR0420LSP
EPRMR1420LSP
EPRMR2420LSP
EPRMR3420LSP
Wiring Diagram — CurrentWatch EPRM Series
Model Diagram
Current Output Models
Voltage Output Models
Load
Load
GND
OUT
OUT
Current Output
Loop-Powered
+24V
Auxiliary Powered
Load
+24V
(-)
(+)
(-)
(+)
Power
Supply
Power
Supply
CA05311003E For more information visit: www.eaton.com
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