Molded case circuit breaker

摘要

Disclosed is a molded case circuit breaker. The molded case circuit breaker includes a case; an interrupter assembly installed in the case, and provided with an arc gas outlet for discharging arc gas generated from inside of the interrupter assembly to outside; an exhaustion guiding portion disposed between the interrupter assembly and the terminal portion, and provided with a discharge chamber therein, to thus provide an arc gas passage between the arc gas outlet and a vent chute of the terminal portion; and an exhaustion cover mounted to the case with a structure to cover the exhaustion guiding portion, to thus block the arc gas passage.

主权项

1. A molded case circuit breaker, comprising:
a case provided with a power side terminal portion and a load side terminal portion to which a power side external terminal and a load side external terminal are connected, respectively; an interrupter assembly installed in the case, and provided with an arc gas outlet for discharging arc gas generated from inside of the interrupter assembly to outside; an exhaustion guiding portion disposed between the interrupter assembly and the terminal portion, and provided with a discharge chamber therein, to thus provide an arc gas passage between the arc gas outlet and a vent chute of the terminal portion; and an exhaustion cover mounted to the case with a structure to cover the exhaustion guiding portion, to thus block the arc gas passage, wherein the exhaustion cover is provided with sealing recesses therein, wherein the exhaustion guiding portion is provided therein with sealing ribs protruding from the case and inserted into the sealing recesses, and wherein a land portion formed between the sealing recesses is engaged with the sealing rib.