JP-2020515228-A5 -

Dates

Publication Date

20221223

Application Date

20171211

Description

As the fault detector, an electronic relay (SSR), a zero-phase current transformer , a voltage detector, a current detector, or a relay can be used to detect the fault electrical signal output from the neutral point or power line. Furthermore, if a ground fault occurs in lines R1 and R2 of the power distribution system 150, leakage current will flow only in the faulty circuit, and since the leakage current is supplied by the power recovery power of the load-side detection/recovery device 230, the leakage current can be detected by monitoring the input/output lines of the load-side detection/recovery device 230 with a zero -phase current transformer , or by monitoring the grounding E line connected to the N2 terminal of the load-side detection/recovery device 230 with a zero-phase current transformer. Alternatively, the N2 terminal of the load-side detection/recovery device 230 may not be connected to ground, and the leakage current may be detected only by voltage.