Molded case circuit breaker operating cradle configuration

Details Molded case circuit breaker operating cradle configuration Molded case circuit breaker operating cradle configuration

1991-01-28

1992-07-14

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Latching means

335172, H01H 920

Patent

active

051306859

ABSTRACT:
A molded case circuit breaker of the type containing an electronic trip unit and a combined actuator-accessory unit to articulate the circuit breaker operating mechanism employs an optimum cradle configuration within the circuit breaker operating mechanism. The operating cradle is fabricated from a steel composition that is optimized to promote improved hardness properties. The optimized cradle interacts with the circuit breaker latch assembly to substantially reduce the tripping force required to articulate the operating mechanism.

REFERENCES:
patent: 3246098 (1966-04-01), Hall
patent: 4736174 (1988-04-01), Castonguay et al.
patent: 4806893 (1989-02-01), Castonguay et al.
patent: 4864263 (1989-09-01), Castonguay et al.
patent: 4951020 (1990-08-01), Changle et al.
patent: 5002839 (1991-03-01), Qureshi et al.

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