Circuit breaker and accessory devices therefor

Details Circuit breaker and accessory devices therefor Circuit breaker and accessory devices therefor

1978-05-25

1980-06-24

Braun, Fred L.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335132, H01H 7312, H01H 7500, H01H 6702

Patent

active

042097606

ABSTRACT:
A multi-pole circuit breaker is provided with a molded insulating housing defining an internal chamber wherein the mechanical trip free contact operating mechanism is disposed, an external recess wherein an auxiliary switch unit is removably mounted, and an external cavity wherein a shunt trip assembly is removably mounted. The switch unit includes one switch operable by the mechanism as it opens and closes the circuit breaker contacts and a second switch operated by the latchable cradle of the mechanism to indicate automatic tripping. The shunt trip assembly includes an electromagnet having an operating member which engages the cradle latch to release the latter.

REFERENCES:
patent: 3388353 (1968-06-01), Isler
patent: 3388357 (1968-06-01), Lawson et al.
patent: 3720891 (1973-03-01), Nicol
patent: 3949333 (1976-04-01), Freitag et al.
patent: 4088973 (1978-05-01), Kussy et al.

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