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Relays & Switches
Indicators & Displays
Relays, Switches, Sensors
CR7310 Ground Fault Current Sensing Relay
.011 - .01 to 0.1 AAC
.11 - 0.1 to 1.0 AAC
110 - 1.0 to 10 AAC
330 - 3.0 to 30 AAC
660 - 6.0 to 60 AAC
101 - 10 to 100 AAC
Trip On Delay
A - .5 to 6 Sec.
B - 2 to 25 Sec.
C - .1 to 1 Sec.
X - No Delay
Trip Point Dial
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
3 Phase Imbalance and Ground Fault Detection Using the CR7310 Ground Fault Sensor
Using External Current Transformers with Other Devices
Relay Internal CT STEP File
Relay Remote CT STEP File
AC Voltage,DC Voltage,AC/DC Voltage
Normally Open or Closed
Normally Open,Normally Closed
NPN Output,TRIAC Output
24 Vdc,120 Vac,240 Vac
Also in Relays
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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