| 摘要 |
PURPOSE:To enable diagnosis of insulation based on zero-phase current from the front face by forming the entire distribution circuit breaker into a single fixture block and molding the input wiring or output wiring into a grip meter for measuring individual zero-phase current and phase current. CONSTITUTION:Distribution circuit breakers 1 are arranged on a support 2, where power is distributed from the input terminal section of a power source through buses 4 to respective circuit breakers 1 and outputted through the output terminal sections 11. The buses 4 are supported by insulators 12 and secured to the support 2. The input terminal section 3, the parallel buses 4 and an input wiring 3 comprises three parallel bars. First and third poles of an input wiring 5 are arranged closely to the front face of a second pole in order to enable measurement of respective phase currents through clamping of two lines between them, and the wiring of the second pole is arranged in the center on the rear side of the two lines in order to enable measurement of zero-phase current through clamping of three lines. |
