Cut Sheet

Volume 8—Sensing Solutions CA08100010E—July 2015 www.eaton.com V8-T7-19
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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.
7.5
Current and Voltage Sensors
CurrentWatch ECSTD Series
ECSTD Series CurrentWatch Current Switches
Contents
Description Page
ECSTD Series CurrentWatch Current Switches
Standards and Certifications . . . . . . . . . . . . . . V8-T7-20
Product Selection . . . . . . . . . . . . . . . . . . . . . . . V8-T7-20
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . V8-T7-21
Technical Data and Specifications . . . . . . . . . . V8-T7-21
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . V8-T7-22
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . V8-T7-22
ECSTD Series CurrentWatch Current Switches
Product Description
The CurrentWatch ECSTD
Series from Eaton’s Electrical
Sector is a family of high
performance current-
operated switches with field-
adjustable time delay to help
minimize
nuisance trips
during start-up and operation.
Designed for motor status
applications where setpoint
accuracy
and repeatability are
critical, the ECSTD Series
offers a linear setpoint
characteristic and constant
hysteresis.
Standard features
include self-powering,
jumper-selectable ranges and
a choice of outputs and
housing styles.
For typical applications of the
Current
Watch ECSTD Series,
see listing on this page.
Application Description
Typical Applications
●
Motor Protection—
Serves as an electronic
proof-of-operation; detects
current draw changes in
motors when they
encounter problems such
as pumps running dry or
pending bearing failure;
non-intrusive and less
expensive to install than
differential pressure flow
sensors or thermal
switches; much quicker
response time than Class
10 overload relays
●
High Inrush or
Temporary Overload
Current—Adjustable start-
up/delay timer allows 0–15
second delay to eliminate
nuisance trips from high
inrush or short overload
conditions
For the most current information
on this product, visit our Web site:
www.eaton.com
Example Application—
Isolated Alarm System Interfacing
Features
●
Adjustable Start-Up/
Delay Timer—Field
adjustable from 0–15
seconds to eliminate
nuisance alarms due to
start-up inrush or
temporary overcurrent
conditions
●
Choice of NO/NC AC or
Universal Outputs—
Contact ratings of 1.0A at
240 Vac or universal
outputs of 0.15A at 240
Vac/dc (NO models) and
0.2A at 135 Vac/dc (NC
models) for use with most
standard motor control
systems
●
Improved Ease of
Installation and Use—
Self-powered, split-core
models simplify
installation, 1.0A AC rating
eliminates need for time
delay relay, and status LED
provides visual indication
of setpoint trip and contact
action
●
Industrial Grade
Performance—Constant
hysteresis and linear
response characteristics
enhance setpoint accuracy
●
Agency Approved—UL
Listed, CE pending
ECSTD Series Current Switch
Existing
Alarm
System
Audible
Alarm
New
Alarm
System
I
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