Page 1
Switches Are
Self-Powered
Easy Setup and
Mounting
Adjustable Setpoint
Models Available
Split-Core Housing for
Quick Installation
Visual LED Indicator
August 2007
ECS Series Current Switch
CurrentWatch Current Sensors
Contents
Overview . . . . . . . . . . . . . . . . . . . . 1
Model Selection, Switches . . . . . . 2
Model Selection, Accessories . . . 3
Wiring Diagram . . . . . . . . . . . . . . . 3
Specifications . . . . . . . . . . . . . . . . 3
Dimensions . . . . . . . . . . . . . . . . . . 4
The CurrentWatch ECS Series from
Eaton’s electrical business is a family
of solid-state adjustable current
switches, ideal for providing status
information on electrical equipment. The ECS is excellent for new
installations, where the conductors
run through the housing, requiring no
cutting. These switches are also ideal
for retrofits, since split-core models
can be opened to fit around existing
conductors. The current switch is
accurate, reliable and easy to install.
The ECS can sense continuous currents from 1 to 150A and does not
require any supply voltage, as the
power required is induced from the
monitored conductor. The output is a
non-polarity-sensitive solid-state contact for switching AC and DC circuits
up to 240V AC/DC. This switch also
includes an LED indicating two states:
on and below trip point, and above
trip point with contacts energized. All
ECS Series switches carry an unconditional five-year warranty.
Any change in current can be sensed
with the ECS Series. A change in current may indicate motor failure, belt
loss/slippage or mechanical failure.
Any of these events can cause the
current to drop significantly, tripping
the switch and notifying the controller.
Approvals
■
UL and C-UL Listed
CurrentWatch™ Current Sensors
ECS Series Current Switch
CA05311006E
AC Current Switches for Detecting Overcurrent Condition
Product Features
Universal Outputs — N.O. or N.C. solid-state switch for control circuits up
■
to 240V AC/DC, compatible with most automation systems
■
Self-Powered — Cuts installation and operating costs
Easily Adjustable Setpoint — Increases application flexibly and speeds
■
start-up
■
Solid- or Split-Core Housings — Versions tailored for each type of installation
LED Indication — Provides quick visual indication of contact status
■
Built-In Mounting Feet — Simple, two-screw panel mount or attach with
■
optional DIN-rail mounting kit accessory
Typical Applications
Electronic Proof of Flow — Current operated switches eliminate the need
■
for multiple pipe or duct penetrations and are more reliable than electromechanical pressure or flow switches
■
Conveyors — Detect jams and overloads
Lighting Circuits — Easier to install and more accurate than photocells
■
■
Fans, Pumps and Heating Elements — Faster response than temperature
sensors
Critical Motors
■
■
Ancillary Equipment
1
Unless otherwise noted, the
products contained in this
document are not designed
or intended for use in human
safety applications.
CA05311006E For more information visit:
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 .
www.eaton.com
Page 2
CurrentWatch™ Current Sensors
2
ECS Series Current Switch
Example Application — CurrentWatch ECS Series
Pump Jam & Suction Loss Protection
August 2007
PLC
Motor
Control
Signal
Motor
Starter
B/I Card
Digital
Input
Current Switch
Model Selection — CurrentWatch ECS Series
Power Supply Aperture Size Output Signal Setpoint and LED Configuration Catalog Number
Top Terminal Current Switch
Solid-Core Housings
Self Powered (No
External Power Needed)
Overload Setpoint
AMPS
Normal Operation
0.74 in. (19 mm) Normally Open Adjustable 1 – 150A Setpoint
Jam
Motor
Off
Tim e
with LED
Fixed 1.0A Setpoint No LED ECSNOFSC
Normally Closed Adjustable 1 – 150A Setpoint
with LED
Fixed 1.0A Setpoint No LED ECSNCFSC
ECSNOASC
ECSNCASC
Split-Core Housings
Stocked product, typical order quantities guaranteed in stock.
0.85 in. (21.6 mm) Normally Open Adjustable 1.75 – 150A
Setpoint with LED
Fixed 1.5A Setpoint
No LED
Normally Closed Adjustable 1.75 – 150A
Setpoint with LED
Fixed 1.5A Setpoint
No LED
ECSNOASP
ECSNOFSP
ECSNCASP
ECSNCFSP
For more information visit: www.eaton.com
CA05311006E
Page 3
August 2007
Accessories — CurrentWatch ECS Series
Description Catalog Number
DIN Rail Mounting Kit (Sensor pictured
for reference and not included in kit)
Stocked product, typical order quantities guaranteed in stock.
Wiring Diagram — CurrentWatch ECS Series
AC or DC
Power
CurrentWatch™ Current Sensors
ECS Series Current Switch
EDINKIT
AC or DC
Load
3
Monitored Wire
Current Switch
NOTE: The above diagram is for Normally Open (N.O.) models.
Specifications — CurrentWatch ECS Series
Description Specification
Power Supply Self-Powered — No Power Supply Needed
Output Magnetically Isolated Solid-State Switch
Output Rating N.O. Version: 0.15A @ 240V AC/DC
Off-State Leakage < 10 µA
Response Time 120 mS
Setpoint Range Solid-Core Housings: 1 – 150A
Hysteresis 5% of Setpoint
Overload Fixed Setpoint, N.O. Models: 6 sec. @ 500A; 1 sec. @ 1,000A
Isolation Voltage UL Listed to 1,270V AC, tested to 5,000V AC
Frequency Range 6 – 100 Hz
Sensing Aperture Solid-Core Housings: 0.74 in. (19 mm)
Housing UL94 V0 Flammability Rated
Environmental Operating Temperature: -58 to 122°F (-50 to 50°C)
Approvals UL and C-UL Listed, CE Certified
N.C. Version: 0.2A @ 135V AC/DC
Split-Core Housings: 1.75 – 150A
All Other Models: 6 sec. @ 400A; 1 sec. @ 1,000A
Split-Core Housings: 0.85 in. (21.6 mm)
Humidity: 0 – 95% RH, Non-condensing
CA05311006E For more information visit: www.eaton.com
Page 4
CurrentWatch™ Current Sensors
4
ECS Series Current Switch
Approximate Dimensions — CurrentWatch ECS Series
Description Approximate Dimensions in Inches (mm)
Solid-Core Housing
August 2007
3.03
(77.0)
0.93
(23.6)
Split-Core Housing
(55.4)
1.19
(30.2)
2.25
(57.2)
0.19 Dia.
(4.8)
2.18
2.40
(61.0)
3.50
(88.9)
3.04
(77.2)
3.53
(89.7)
2.40
(61)
0.74 Dia.
(19)
0.19 Dia.
(4.8)
0.85 (21.6)
0.85
(21.6)
For more information visit: www.eaton.com
CA05311006E
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