| 摘要 |
A molded-case circuit breaker of the present invention inhibits dielectric breakdown from a circuit breaker body to a terminal part through a lug type terminal block as an insulation member made of an insulation material is installed between the lug type terminal block and the circuit breaker body, and inhibits formation of arc current carrying paths between them. Accordingly, the molded-case circuit breaker inhibits imperfect extinction of arc, thereby increasing operation reliability of the circuit breaker. |
