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Troubleshooting case

Fault finding for DC system


Time: April 15, 2015

Location: Tangshan Datang International Power Plant

Service content: DC system grounding fault

There is ground fault Datang International Tangshan power plant 2# unit DC system, through ground search instrument to detect the use of the company, the AC electrical faults exist in channeling detection system, through the use of fault location device in one investigation, finally found the specific AC fault point of power channeling, solve AC electrical faults after the channeling. DC system did not recover to the normal state, the grounding finder again for the DC system used to detect DC system insulation fault also found decreased in the system, the insulation resistance value is 339K, through the use of fault location device for fault location, the final position to the point of failure, after the solution of DC system The system resumed its normal operation


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