Abstract:
The portion of a circuit breaker casing defining an opening for a pivotable operating handle is provided with a pair of grooves respectively disposed on opposite sides of the opening adjacent an ON position of the handle and extending transversely of the direction of movement of the handle. A retaining means provided on the handle includes a pair of pivotally mounted locking members having end portions insertable respectively in the grooves to lock the handle in ON position while it is being biased toward OFF position by the internal operating mechanism of the circuit breaker.
Abstract:
Latching means for holding the movable contact arm carriers of a multipole molded-case electric circuit breaker in an open or OFF position while the operating handle is held in an ON position. The latching means is electrically operable from a remote point to release the contact arm carriers and allow them to move to ON position toward which they are biased by a spring of a toggle mechanism when the operating handle is in ON position.