Cut Sheet

Volume 8—Sensing Solutions CA08100010E—July 2015 www.eaton.com V8-T7-3
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7.0
Current and Voltage Sensors
Introduction
ECSTD Series CurrentWatch
AC Current Switches
ECSD Series CurrentWatch
DC Current Switches
EAC Series CurrentWatch
AC Current Sensors
EACR Series CurrentWatch
RMS Current Sensors
Page V8-T7-19
Overview
AC current switches with time delay.
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
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
Product 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
Current Range
Adjustable set point, 1.5–200A
Approvals
UL Listed
cUL Listed
CE
(ECSTD401 and 4025C—No approval)
(Pending)
Page V8-T7-23
Overview
DC switch with solid-state or mechanical
relay output.
Applications
Electronic proof of flow—current operated
switches eliminate the need for multiple
pipe or duct penetrations
Welders—Instant indication of equipment
status
Large drive motors—provide monitoring for
field loss protection
Power supplies—detect and signal over-
current condition before equipment damage
UPS—monitors battery output
Ancillary equipment
Product Features
Choice of mechanical relay or
solid-state outputs—
SPDT (Form C) relay, 5.0A at 240 Vac
or 30 Vdc
Solid-state, NO, 0.15A at 240 Vac/dc
Easily adjustable setpoint—speeds start-up
and reduces inventory
Compact, one-piece design—easily fits in
crowded control panels
Input isolation—safer than shunt/relay
combinations
Adaptive hysteresis—hysteresis is five
percent of setpoint, allowing closer control
than fixed-hysteresis switches
Solid-core housings
Current Range
Varies by model
Approvals
UL Listed
cUL Listed
CE
Page V8-T7-26
Overview
AC current sensor with analog outputs and
power supply options.
Applications
Automation equipment—analog current
reading for remote monitoring and software
alarms
Data loggers—self-powered sensor helps
conserve data logger batteries
Panel meters—simple connection displays
power consumption
Product Features
Highly accurate—factory matched and
calibrated single-piece sensor is more
accurate than traditional two-piece, field-
installed solutions
Average responding—“average
responding” algorithm gives an RMS output
on pure sine waves, perfect for constant
speed (linear) loads
Jumper selectable ranges—the ability to
change input ranges reduces inventory and
eliminates zero and span
Isolation—output is magnetically isolated
from the input for safety and elimination of
insertion loss (voltage drop)
Current Range
0–200A
Approvals
UL Listed
cUL Listed
cULus (except EACP models)
CE marked (except EACP models)
(EACP models not listed)
Page V8-T7-30
Overview
True RMS AC current sensing with
4–20 mA output.
Applications
VFD controlled loads—monitoring Vdc
output indicates how the motor and
attached load are operating
SCR controlled loads—accurate
measurement of phase angle fired or burst
fired (time proportioned) SCRs, with faster
current measurement than temperature
sensors
Switching power supplies and electronic
ballasts—true RMS sensing is the most
accurate way to measure power supply or
ballast input power
Product Features
True RMS output—true RMS technology is
accurate on distorted waveforms like VFD or
SCR outputs
Jumper-selectable ranges—reduces
inventory and eliminates zero and span
Isolation—output is magnetically isolated
from the input for safety and elimination of
insertion loss (voltage drop)
Current Range
0–200A true RMS
Approvals
UL Listed
cUL Listed
cULus
CE