| 摘要 |
A wattmeter upon phases is provided to measure the amount of leakage current and measure the amount of current at each phase in wiring circuit breaker in a low voltage terminal. A bus bar is combined with each output terminal of a wiring circuit breaker, and a hole is installed on an R-phase, an S-phase, a T-phase, and an N-phase and it is fixed by a bolt. Four blocks are arranged as a square block at the center of an internal hole in which the bus bar is penetrated. A current transformer detects the magnetic field in the bus bar. |
