Molded case circuit breaker with an improved contoured cradle

Details Molded case circuit breaker with an improved contoured cradle Molded case circuit breaker with an improved contoured cradle

H - Electricity

01

H

306/284

H01H 71/52 (2006.01)

Patent

CA 1283434

ABSTRACT OF THE DISCLOSURE A molded case circuit breaker includes a highly integrated operating mechanism having an over-center toggle mechanism for opening and closing a pair of separable electrical contacts. A pivotable, one-piece cradle coupled to the breaker handle includes a cradle latch surface for latching with a trip arm of a trip mechanism, a contact stop surface for limiting the movement of one of said electrical contacts and an arcuate cam surface for engaging a cradle cam pin during a reset operation. The arcuate cam surface of the cradle is contoured to enable the resetting of the operating mechanism after a trip operation by applying a relatively low, substantially constant reset force to the breaker handle.

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