Molded case circuit breaker with contact mechanism

摘要

Molded case circuit breaker, which includes fixed contactors (1a, 1b), a movable contactor (2) which is movable to a position for contacting the fixed contactors and to a position separated from the fixed contactors, a switching mechanism ( 3, 3-1a, 3-1b, 4a, 4b, 4c, 6, 7, 8, 9) for driving the movable contactor to contact with or separated from the fixed contactors so as to open / close a circuit, restriction unit for restricting the switching mechanism, and a handle to open / close the manually switching mechanism, the molded case circuit breaker characterized by a contact mechanism (7, 7-1, 9, 10, 11) being tripping the switching mechanism by releasing the restricting unit and automatically makes rotate the handle towards an on position even without manual power so that a driven state is indicated when the handle is manipulated to move its position to an off position or position restoration in a state in which the movable contactor contacts and the fixed contactors are melt adhered to each other.