Circuit breaker with dual function electromagnetic tripping mech

Details Circuit breaker with dual function electromagnetic tripping mech Circuit breaker with dual function electromagnetic tripping mech

1990-11-14

1992-02-18

Tolin, Gerald P.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

335190, H01H 900

Patent

active

050897977

ABSTRACT:
A circuit breaker embodies with a single electromagnetically actuated plunger two levels of actuation, corresponding to two levels of excessive current or voltage defined by two different airgaps, one at the lower level for triggering the toggle mechanism, the other at the higher level for directly actuating the movable arm through a kicker arm. The preferred embodiment provides a double-ended lever pulled by the plunger at midpoint for actuating the trip bar, and the kicker arm is actuated in an overriding situation by the lever rotating about the trip bar blocked at the end of its initial move.

REFERENCES:
patent: 3638157 (1972-01-01), Kruzic
patent: 3731239 (1973-05-01), Ellenberger
patent: 3863042 (1975-01-01), Nicol
patent: 4001743 (1977-01-01), Arnhold
patent: 4503408 (1985-03-01), Mrenna
patent: 4654614 (1987-03-01), Chien
patent: 4697163 (1987-09-01), Grunert
patent: 4725799 (1988-02-01), Bratkowski
patent: 4808952 (1989-02-01), Berner et al.

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