Circuit breaker with interlock for welded contacts

Details Circuit breaker with interlock for welded contacts Circuit breaker with interlock for welded contacts

H - Electricity

01

H

H01H 77/00 (2006.01) H01H 71/50 (2006.01) H01H 73/02 (2006.01)

Patent

CA 2069798

Abstract of the Disclosure A circuit breaker includes an interlock which prevents movement of the handle to the off position when the contacts are welded closed. The interlock includes a pair of floating links which jam between slots in arms of the yoke of a spring powered operating mechanism which carries the handle, and recesses in the rotatable cross-bar carrying the movable contact arms. The recesses are offset from the rotational axis of cross-bar so that an attempt to move the switch to the off position generates a moment which will break open lightly welded contacts.

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