| 摘要 |
A molded case circuit breaker (MCCB) includes a case (210), an interrupter assembly (220), an exhaust guide part (230), an exhaust cover (240), a sealing groove (241)and a sealing projection. The interrupter assembly is mounted inside the case, and has an arc gas exhaust port (222) 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 (231) therein to provide an arc gas passage between the arc gas exhaust port and a vent chute (213) 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. |
