CMGF420 Bender Ground Fault Relay

The CMGF420 Bender Ground Fault Relay is a control-powered, UL 1053 listed service entrance relay for use in grounded systems. When combined with an N/O shunt trip breaker, it provides ground fault detection and interruption at the mains entrance of an electrical system. When a fault is detected, the output contacts will cause the connected shunt trip breaker to trip and interrupt power to the system.

The relay supports a pickup range of up to 1200 A when using a compatible current transformer. The CMGF420 supports current transformers with a 600:1 (60…1200 A trip range) or 1000:1 ratio (100…1200 A trip range).

After entering the proper current transformer ratio into the settings of the device, the value shown on the LCD screen will be the value read on the primary side of the current transformer.

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Feature

  • Provides ground fault detection and interruption at the mains entrance of an electrical system
  • Service entrance protection per NEC article 230.95 and CSA C22.1 Section 14-102
  • Supports a pickup range of up to 1200 A
  • To be combined with an N/O shunt trip breaker
  • To be combined with current transformers with a 600:1 or 1000:1 ratio

Applications

  • Service entrance ground fault protection
  • General industrial use

Specifications

 

CMGF420 Variant(s)

Name Response Value Supply Voltage Art. No.
CMGF420-D-2 60…1200 A AC 100…240 V (42…460 Hz) DC 100…240 V B93060015

Optional Accessories for CMGF420

Type Art. No.
Mounting clip for screw mounting (one piece per device) B98060008
Mounting frame XM420 B990994

 

 

 

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