| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground fault point identification device, capable of identifying a ground fault point efficiently and promptly even in the case of a transient ground fault trouble.SOLUTION: A ground fault point identification device 1 is connected to a DC circuit of a mega-solar power plant 2 or the like which includes each parallel individual power line 26 and a joint power line 27, joining the individual power lines 26, and a breaker such as an MCCB 22 provided on each individual power line 26. The ground fault point identification device 1 is connected to the joint power line 27, to connect a ground fault detection circuit 11, which detects the ground fault of the DC circuit, to the joint power line 27. Also, the ground fault point identification device 1, in response to a ground fault detection by the ground fault detection circuit 11, causes each breaker, for example, the MCCB 22 to temporarily open successively, so as to monitor the cancellation of the ground fault by the breaker operation.SELECTED DRAWING: Figure 2 |
