MOLDED CASE CIRCUIT BREAKER

摘要

A molded case circuit breaker (MCCB) includes a case, an interrupter assembly, an exhaust guide part, an exhaust cover, a sealing groove and a sealing projection. The interrupter assembly is mounted inside the case, and has an arc gas exhaust port to exhaust an arc gas generated inside the case. The exhaust guide part is disposed between the interrupter assembly and the terminal part, and has an exhaust chamber therein to provide an arc gas passage between the arc gas exhaust port and a vent chute of the terminal part. The exhaust cover is mounted to the case in a structure covering the exhaust guide part, to seal the arc gas passage. The sealing groove is formed in an inner surface of the exhaust cover. The sealing projection is formed on the arc gas exhaust port of the interrupter assembly, to be inserted and coupled into the sealing groove.

主权项

1. A molded case circuit breaker, comprising:
a case configured to have a line side terminal part and a load side terminal part, to which a line side external terminal and a load side external terminal are respectively connected; an interrupter assembly mounted inside the case, the interrupter assembly having an arc gas exhaust port to exhaust an arc gas generated inside the case; an exhaust guide part disposed between the interrupter assembly and the terminal part, the exhaust guide part having an exhaust chamber therein to provide an arc gas passage between the arc gas exhaust port and a vent chute of the terminal part; an exhaust cover mounted to the case in a structure covering the exhaust guide part, to seal the arc gas passage; a sealing groove formed in an inner surface of the exhaust cover; and a sealing projection formed on the arc gas exhaust port of the interrupter assembly, to be inserted and coupled into the sealing groove.