TERMINAL COVER OF CIRCUIT BREAKER

摘要

PROBLEM TO BE SOLVED: To provide a terminal cover of a circuit breaker for preventing high exhaustion pressure in breaking a large current from damaging the circuit breaker even when an opening area of an exhaust port is relatively small. SOLUTION: A lattice-like cover-side exhaust port 15a having a plurality of muntius 15b is provided facing to the exhaust port 7 in a circuit breaker body 1, and the terminal cover 15 is structured so that the plurality of muntius 15b are deformed by the exhaustion pressure of the arc gas to increase an effective area of the cover-side exhaust port 15a.