Circuit breaker having increased contact opening velocity at tri

Details Circuit breaker having increased contact opening velocity at tri Circuit breaker having increased contact opening velocity at tri

1983-12-08

1985-06-04

Goldberg, E. A.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335191, 335201, H01H 500

Patent

active

045217564

ABSTRACT:
A pair of springs (14, 22) provide counteracting rotational bias to a movable contact arm (8) pivotally supported on a latched lever (10). A handle (4) is manually operable for reducing the force applied by one spring (22) to effect contact (6a, 8b) opening as a result of force applied by the other spring (14). Current sensing means (28, 34, 28a) are operable to release the latched lever (10) for releasing the pivot point (12) of the movable contact arm (8) whereby both springs (14, 22) work in a common direction to rapidly separate the contacts (6a, 8b). Arc gases are exhausted in the direction of separating movement of the movable contact arm (8) to utilize forces associated with arc gas pressure in a cummulative manner with the forces provided by springs (14, 22) to further increase the contact separation speed.

REFERENCES:
patent: 3193643 (1965-07-01), Hollyday

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