| 摘要 |
PROBLEM TO BE SOLVED: To provide a power line artificial ground fault testing system for obtaining significant reduction in the number of ground fault occurrences and marked reduction in the working hours, and to provide a power line artificial ground fault testing method. SOLUTION: The power line artificial ground fault testing system 1 comprises a ground fault generation device 10 for generating ground faults in a bus line 101; a testing device 120 for testing a plurality of ground fault direction relays 135<SB>1</SB>-135<SB>3</SB>respectively provided on a plurality of distribution lines 102<SB>1</SB>-102<SB>3</SB>of the system of the bus line 101, on the basis of a zero-phase voltage V<SB>0</SB>input from a grounding voltage transformer 103 provided in the bus line 101; a ground fault current I<SB>g</SB>input from the ground fault generation device 10 and zero-phase currents I<SB>01</SB>-I<SB>03</SB>input from a plurality of zero-phase current transformers 134<SB>1</SB>-134<SB>3</SB>respectively provided on the plurality of the distribution lines 102<SB>1</SB>-102<SB>3</SB>of the system of the bus line 101; and a serial penetration line 20 with both ends connected to the ground fault generation device 10 and penetrating the plurality of the zero-phase current transformers 134<SB>1</SB>-134<SB>3</SB>. COPYRIGHT: (C)2007,JPO&INPIT
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