LED Indication / Output Status
Monitored Amps
Output
Smart-LED
(If Present)
N.O.
N.C.
None or Minimum
Open
Closed
Off
Below Trip Level
Open
Closed
Slow (2 sec.)
Above Trip Level
Closed
Open
Fast (0.5 sec.)
Wiring Diagram
Connect control or monitoring wires to the sensor. Use up to 14
AWG copper wire and tighten terminals to 7 in.-lbs / 0.79 N·m maxi-
mum torque. Be sure the output load does not exceed the solid
state output rating.
Ranges and Maximum Amps
Housing
Range
Maximum Amps
Continuous 6 sec.
1 sec.
Solid Core
1.5-175 A
150 A
400 A
1,000 A
Split Core
2-200 A
150 A
400 A
1,000 A
CAUTION
INCANDESCENT LAMPS CAN
HAVE “COLD FILAMENT INRUSH”
CURRENT OF UP TO TEN TIMES
THEIR RATED AMPERAGE. USE
CAUTION WHEN SWITCHING
LAMPS
.
AC or DC
Power
AC or DC
Load
Output Signal
To Monitored Load
Use caution when
switching lamps
Hysteresis
Setting Hysteresis
Low
<
0.01 A
Mid
<
0.1 A
High
<
0.5 A
Switching Delay
Delay Type
Low Range
Mid Range
High Range
On Delay
0.23 sec. max.
0.05 sec. max.
0.03 sec. max.
Off Delay
0.02 sec. max.
0.02 sec. max.
0.01 sec. max.
Troubleshooting
Problem
Solution
Switch is
always
tripped.
The setpoint may be too low. Turn pot clock-wise to increase set-
point.
Switch may have been overloaded and contacts are burned out.
Check the output load, remembering to include inrush on inductive
loads (coils, motors).
Switch will
not trip.
The setpoint may be too high. Turn pot counter-clockwise to
decrease setpoint.
For split core models, the core contact area may be dirty. Open the
sensor and clean the contact area.
The monitored current may be below the minimum required. Loop the
monitored wire several times through the aperture until the “sensed”
current rises above the minimum. The sensed amps equals “actual
amps” multiplied by the “number of loops.” Count loops on the
inside of the aperture.
Switch may have been overloaded and contacts are burned out.
Check the output load, remembering to include inrush on inductive
loads (coils, motors).
Specifications
Specification
Value
Power Supply
Self Powered – No Power Supply Needed
Output
Magnetically Isolated Solid State Switch
Output Rating
AC-Only Models: N.O./N.C. 1 A @ 240 VAC
AC/DC Models:
N.O. 0.15 A @ 240 VAC/DC
N.C. 0.20 A @ 135 VAC/DC
Off-State Leakage
ECSTD402SC and ECSTD405SP Models: 2.5 mA
All Other Models: Negligible
Response Time
Adjustable, 0.12 to 15 seconds
Setpoint Range
Solid Core Models: 1.5-12, 12-55 and 50-175A
Split Core Models: 2-12, 12-55 and 50-200A
Setpoint Adjustment
Solid Core Models: 15-Turn Potentiometer
Split Core Models: 4-Turn Potentiometer
Hysteresis
Constant 5% of Setpoint
Overload
See “Ranges and Maximum Amps” in Table
Isolation Voltage
UL Listed to 1,270 VAC, Tested to 5,000 VAC
Frequency Range
50-100 Hz
Sensing Aperture
Solid Core Models: 0.75 in. (19 mm) dia.
Split Core Models: 0.85 in. (21.7 mm) sq.
Housing
UL94 V0 Flammability Rated
Environmental
Operating Temperature: -58 to +149°F (-50 to +65°C)
Humidity: 0-95% RH, Non-Condensing
Approvals
UL Listed, E117028
UL tested to Canadian safety standards
CE
RoHs Compliant
(ECSTD401SC and ECSTD402SC not UL or cUL listed)
3
EATON
www.eaton.com
Instructions Publication
P51921
Effective July 2017
CurrentWatch™ ECSTD Series
AC Current Switches with Time Delay
