| 摘要 |
The present invention relates to a branch circuit breaker, and more specifically, to a branch circuit breaker having an arc gas circuit breaker, in which a blocking unit for blocking of conductive arc gases emitted by blocking of a short-circuit current is formed. The branch circuit breaker comprises: a front case part formed on a front surface; a rear case part detachably formed on the front case part; and an arc gas circuit breaker fastened in an upper part of the front case part. The arc gas circuit breaker includes: an upper detachable part fastened in the upper part of the front case part; an upper partition part surrounding at least two sub busbars of the branch circuit breaker; and a back partition part extending downwards from the upper partition part along the rear case part of the branch circuit breaker. According to the present invention, conductive arc gases generated during blocking of a short-circuit current is prevented from being transited to a sub busbar connected to an adjacent branch circuit breaker. |
