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What is the function of the "Alarm" pilot light on the STR22SE, STR23SE and STR53UE electronic trip units.

FA23772

20 November 2020

The Alarm pilot light is an overload indicator light.

It is:
Lit with a steady light if the load current is greater than 90% of the adjustment threshold Ir
Flashing if the load current is greater than 105% of the adjustment threshold Ir. The circuit breaker will trip if the light continues to flash.