Circuit breaker with overcurrent tripping device

Details Circuit breaker with overcurrent tripping device Circuit breaker with overcurrent tripping device

1993-03-25

1994-07-12

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 42, H01H 7512

Patent

active

053292642

ABSTRACT:
An overcurrent tripping device which is included in a circuit breaker is constituted by a pre-assembly unit of a holder with a conductor, a fixed core for generating a magnetic attraction force responding to an overcurrent, and a bimetal warping responding to the temperature rise of the conductor, and an operation arm rotatably borne on the holder and having a moving core which is to be attracted to the fixed core by the magnetic attraction force.

REFERENCES:
patent: 2902560 (1959-09-01), Stanback et al.
patent: 3264435 (1966-08-01), Klein et al.
patent: 3305653 (1967-02-01), Strobel
patent: 3317867 (1967-05-01), Powell
patent: 3936780 (1976-02-01), Hennemann
patent: 4074218 (1978-02-01), Salvati et al.
patent: 4503408 (1985-03-01), Mrenna et al.
patent: 4691182 (1987-09-01), Mrenna et al.

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