Ground fault circuit breaker with ground fault trip indicator

Details Ground fault circuit breaker with ground fault trip indicator Ground fault circuit breaker with ground fault trip indicator

1975-05-05

1976-07-20

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 17, H01H 8302

Patent

active

039709752

ABSTRACT:
A circuit breaker module and a detector module are mounted side by side to form a ground fault interrupter. The detector module includes an electromagnet for mechanical engagement with operation of the automatic trip device of the circuit breaker to open the latter upon the occurrence of predetermined ground fault conditions. An indicator member is pivotally mounted between the detector and circuit breaker modules. When the electromagnet is energized, it moves the indicator member from a retracted to an indicating position. In the latter position a portion of the indicator member is readily visible to indicate that tripping has resulted from a ground fault rather than from an overload.

REFERENCES:
patent: 3440580 (1969-04-01), Molenaar
patent: 3855502 (1974-12-01), Parde et al.
patent: 3864649 (1975-02-01), Doyle

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