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Overload Only Models

Amps

Output Open

(LED Off)

Output Closed

(LED Slow)
115% of Calibration Point

Calibration Point
(LED Fast)

Ranges and Maximum Amps

Housing

Range

Maximum Amps
Continuous 6 sec.

1 sec.

Solid Core

1.5-150 A

500 A

500 A

1,000 A

Split Core

2.8-150 A

500 A

500 A

1,000 A

Troubleshooting

Problem

Solution

Switch is 

always 

tripped.

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.

For split core models, the core contact area may be dirty. Open the 

sensor and clean the contact area.
Switch may have been overloaded and contacts are burned out. 

Check the output load, remembering to include inrush on inductive 

loads (coils, motors).
Make sure function switch is in “RUN” mode.

Specifications

Specification

Value

Power Supply

Self Powered–No Power Supply Needed

Output

Magnetically Isolated Solid State Switch

Output Rating

Normally Open (N.O.) Models: 0.30 A @ 135 VAC/DC

Off-State Leakage

< 10 µA

Response Time

200 ms

Setpoint

Overload Only Models: +15% of Load

Underload Only Models: -15% of Load 

Over/Underload Models: ±15% of Load (Operating 

Window)

Setpoint Ranges

Solid Core: 1.5-150 A 

Split Core: 2.8-150 A

Hysteresis

Approx. 5% of Setpoint

Isolation Voltage

UL Listed to 1,270 VAC, Tested to 5,000 VAC

Frequency Range

6-100 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: -4 to 122°F (-20 to +50°C)

Humidity: 0-95% RH, Non-Condensing

Approvals

UL Listed, E117028

UL tested to Canadian safety standards

CE

RoHs Compliant

Over/Underload Models

Amps

Output Open

Output Open

(LED Off)

Output Closed

(LED Slow)
115% of Calibration Point

(LED Fast)

85% ofCalibration Point
(LED Slow)

Current Switch Operation

Model

Output Diagram

Underload Only Models

Amps

Output Open

(LED Off)

Output Closed

(LED Slow)

Output Open

(LED Fast)

Calibration Point

3

EATON 

www.eaton.com

 

Instructions Publication 

P51922

Effective July 2017

CurrentWatch™ ECS7 Series Current Switches

Self-Calibrating AC Current Switches 

with Solid State Outputs

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