AUTOMATIC CIRCUIT BREAKER Russian patent published in 1998 - IPC

FIELD: electrical engineering; low-voltage (such as vacuum) circuit breakers. SUBSTANCE: circuit breaker designed for protecting electric circuits and for infrequent ON/OFF operations has contacts 1, double-arm lever 2, pawls 3 and 4 that function to disconnect circuit breaker from respective protected devices to which they were set in advance, rocker 5 ensuring desired pressure on pawls by varying relationship between its arms, pushrod of closing mechanism 7, and stop 8 placed on lever. EFFECT: improved reliability of circuit breaker, reduced size of final elements. 3 dwg