Cutler Hammer, Div of Eaton Corp CurrentWatch Application Information
EDC Series Current Sensor in
Split-Core Housing
CurrentWatch姠 Current Sensors
Product Focus
Current Sensors
Current Switches
Ground Fault Sensors
Introduction
Eaton’s Cutler-Hammer姞
CurrentWatch family of
current sensors provide high
performance AC or DC current
sensing for industrial use.
These devices are ideal for
providing status information
or protection for electrified
equipment. The CurrentWatch
series is accurate, highly reliable and perfect for new
or retrofit applications.
With models measuring up to
2,000 amps AC and 300 amps
DC , CurrentWatch products
can be used in a wide range of
applications such as equipment
monitoring, fan status, pump
status and equipment protection. Target applications for
current sensors include:
detecting locked rotors; loss of
load; open heater or lamp load;
pump jams; suction loss;
motor wellness; belt loss
or slippage; and general
mechanical wear or failure.
A Family of Switches
and Sensors
CurrentWatch products are
available in both switch and
sensor variety. Understanding
this distinction is key to
choosing the right product for
your application.
Current switches are set to
trip at an over or undercurrent
condition. A change in current
will send an output signal
notifying of an unwanted
event. Current switches
are designed with fixed or
adjustable trip points and are
ideal for providing information
on AC electrified equipment.
Current sensors operate by
monitoring current flow in
equipment. The current
magnitude is converted into
a linear and proportional analog
signal (4 – 20 mA, 0 – 5 V or
0 – 10 V). Small changes in
current can be detected,
avoiding costly repairs and
mechanical problems before
they occur. These sensors are
magnetically isolated, contain
internal signal conditioning,
are safer to use than current
transformers, do not require
additional circuitry, and are
completely self-contained in
one compact package.
Solid or Split-Core Housings
CurrentWatch products are
available in either solid- or
split-core housing types.
Solid-core housing models
are ideal for new equipment
installations where the
conductor wire is ran through
the fixed aperture.
Split-core models are perfect
for retrofit applications because
the housing can be opened
to fit around an existing
conductor. As such, split-core
current sensors are easy to
install, without re-wiring and
shutting down a process for
long periods of time. The
simplicity of installing split-core
models reduces overall
installation costs.
Self-Powered
Some CurrentWatch products
are self-powered, requiring
no external power supply to
function. Instead, the power
required is induced from the
monitored conductor. With
self-powered sensors, just
connect the output to a
PLC, DDC or some overall
management controller.
Performance and Flexibility
Many applications can benefit
from measuring current flow.
Because of this, the use of
current sensors has grown
beyond just circuit protection
and reporting. Now, technological advances in current sensing
provide more ways to monitor,
improve performance and
control power consumption.
And with the straightforward
installation of CurrentWatch
products, current sensing
has never been easier
to implement.
Warranty Backed,
Industry Approved
CurrentWatch products carry
a five-year warranty and
meet UL姞 and CE approvals.
The proven technology of
CurrentWatch is the right
choice for your processes,
equipment and overall
continuous improvement
approach to business.
ECS Series in Solid-Core Housing
EAC Series with DIN-Rail Mounting
Accessory and EPRM Series with
DIN-Rail Mount Housing
CURRENTWATCH GENERAL FEATURES AND CAPABILITIES
Power Supply Outputs Housing
Self Loop Auxiliary Solid- Split- Current Response
Description Powered Powered Powered Discrete Analog Core Core Range Tim e Approvals
Current Switches
ECS Series
AC Current Switch • — — NO / NC — • • Fixed or Adjustable 120 msec UL and CE
Set Point, 1 – 150 A
ECSJ Series AC Current Switch • — — NO / NC — • • Adjustable Set Point, 40 – 120 msec UL and CE
with Range Select 1.75 – 200 A
ECS7 Series Self-Calibrating • — — NO / NC — • • Self-Calibrating 200 msec UL and CE
AC Current Switch Set Point, 1.5 – 150 A
ECSTD Series AC Current Switch • — — NO / NC — • • Adjustable Set Point, Adjustable, UL and CE
with Time Delay 1.5 – 200 A 0.2 – 15 sec
Current Sensors
EAC Series
AC Current Sensor • • • — 4 – 20 mA, • • 0 – 200 A 100 – 300 msec UL and CE
0 – 5 V,
0 – 10 V
EACR Series AC Current Sensor, —• — — 4 – 20 mA, • • 0 – 200 A True RMS 600 msec UL and CE
True RMS 0 – 5 V,
0 – 10 V
EDC Series DC Current Sensor —— • — 4 – 20 mA, • • 0 – 300 A 20 – 100 msec UL and CE
0 – 5 V,
0 – 10 V
EPRM Series AC Current Sensor —• • — 4 – 20 mA, —• 0 – 400 A < 500 msec UL and CE,
with True RMS and 0 – 5 V, < 1,000 msec Pending
DIN-Rail Mount 0 – 10 V
Ground Fault Sensors
EGF Series
Ground Fault Sensor —— • NO / NC / — • — Fixed or Adjustable 15 – 200 msec UL
Dual Contacts 5/10/30 mA Trip Recognized CE
CurrentWatch is a trademark of Eaton Corporation. Cutler-Hammer is a federally registered
trademark of Eaton Corporation. UL is a registered trademark of Underwriters Laboratories Inc.
Key Features
•
AC current sensing up to 2,000 amps, DC current sensing up
to 300 amps
•
Solid- or split-core housings for easy installation in new or
retrofit applications
•
DIN-rail mountable housings and DIN-rail mounting accessory
•
Visual LED indicators for easy setup and status
•
Self-powered models available
•
Field adjustable current sensing ranges allow for increased
flexibility and reduced stock
•
Normally-closed or normally-open output configurations
•
Discrete or analog outputs (4 – 20 mA, 0 – 5 V, 0 – 10 V)
•
Five-year warranty, UL and CE approvals
Industrial Segments for CurrentWatch
•
Agriculture
•
Biotech and biofuels
•
Industrial car wash
•
Chemical treatment
•
Extrusion processes
•
Food and beverage
•
Bottling and canning
•
Generators
•
Furnaces and kilns
•
Lumber and logging
•
Machine tool
•
Manufacturing
•
Material handling
•
Material reduction
•
Metalforming
•
Mining
•
Oil and gas
•
Pharmaceutical
•
Petrochemical
•
Plastic and rubber molding
•
Pumps and compressors
•
Refrigeration
•
Semiconductor processing
•
Textile
•
Water and wastewater
EXAMPLE APPLICATIONS
Pump Jam and Suction Loss Protection
Current Sensing for Non-Linear AC Loads
Eaton Corporation
Electrical Group
1000 Cherrington Parkway
Moon Township, PA 15108
United States
877-ETN CARE (877-386-2273)
Eaton.com
© 2007 Eaton Corporation
All Rights Reserved
Printed in USA
Publication No. PA05311001E / Z5750
May 2007
S
Overload Setpoint
PLC
Motor
Control
Signal
Motor
Starter
B/I Card
Digital
Input
AMP
Normal Operation
Current Switch
Jam
Tim e
Motor
Off
L
I
N
E
137.2A
Two-Wire Installation
is Fast and Easy
Controller
True RMS Output
Even on VFDs or SCRs
54.7Hz
VFD
Field
Selectable
Ranges
Motor
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