Item #: CR7310
Our Price: $136.22
Trip Status  
Supply Voltage  
Trip Range  
Trip On Delay  
Trip Point Dial  
Output Options  
The CR7310 series, Ground Fault Sensor provides a reliable and cost effective method for sensing ground faults. The current-carrying wires are routed through the opening extending from the top of the case. When ground current reaches the level set by the trip point adjustment, the relay trips, illuminates the tripped LED and provides an output signal. A precision voltage reference circuit ensures a highly repeatable trip point. The Sensor is rated as a Class 1 device.

*An External Current Sensing Transformer is needed for the proper operation of models that designate an External Transformer

Catalog Page

Application Guides

Step File

Current AC Current
Voltage Type AC Voltage,DC Voltage,AC/DC Voltage
Ground Fault Ground Fault
Mechanical Relay Mechanical Relay
Normally Open or Closed Normally Open,Normally Closed
Output NPN Output,TRIAC Output
LED Indicator LED Indicator
Power 24 Vdc,120 Vac,240 Vac
Mount Panel Mounted


  • Variable trip point and time delay
  • Monitors currents from 10 mAAC to 100AAC 
  • Electrical isolation between circuits
  • Output relay rated up to 20 Amps
  • LED trip status indicator
  • Dead band prevents relay chatter
  • Calibrated dial option available
  • External current transformers available


  • Power-On Delay: 100 ms max
  • Input Supply Power: Terminals: 2 - 1/4" Male Q C
  • Frequency: 60 to 400 Hz
  • Mechanical Life: 10 million operations, typ.@ rated load


  • Monitor electrical heater elements
  • Sense motor over/under loads
  • Detect lamp burn-out
  • Indicate phase loss


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Digi-Key Corporation
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