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The CMGF420 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
Bender Inc.420 Eagleview Blvd.Exton PA 19341
Toll-Free: 800-356-4266Main: 610-383-9200Fax: 610-466-2071