Molded case circuit breaker

摘要

Disclosed is a molded case circuit breaker. The molded case circuit breaker includes include: a case; an interrupter assembly installed in the case, and provided with an arc gas outlet; an exhaustion guiding portion disposed between the interrupter assembly and the terminal portion; an exhaustion cover mounted to the case, with a structure to cover the exhaustion guiding portion; and exhaustion guides spaced from each other in the exhaustion guiding portion, in a direction perpendicular to an arc gas discharge direction, in a state where the gas divergence portion is disposed therebetween, the exhaustion guides forming the arc gas passage together with the gas divergence portion. Under such configuration, arc gas discharged out of the arc gas outlet can be rapidly discharged to outside through the exhaustion guides, without an eddy current.

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 respectively connected; an interrupter assembly installed in the case and provided with an arc gas outlet for externally discharging arc gas generated from inside the interrupter assembly; an exhaustion guiding portion disposed between the interrupter assembly and the load side terminal portion and comprising a gas divergence portion configured to provide an arc gas passage diverged to two vent chutes of the load side terminal portion; an exhaustion cover mounted to the case configured to cover the exhaustion guiding portion; and exhaustion guides spaced from each other in the exhaustion guiding portion in a direction perpendicular to an arc gas discharge direction, wherein the gas divergence portion is disposed between the exhaustion guides and the arc gas passage is formed by the exhaustion guides and the gas divergence portion, wherein the exhaustion guiding portion comprises an opening facing an installation surface of the molded case circuit breaker and the exhaustion cover is detachably mounted to a lower surface of the case and configured to open and close the opening of the exhaustion guiding portion.