Based on the principle of secondary side grounding of traction transformers of CRH380B EMUs,this paper an-alyzes the problems existing in the secondary side grounding detection of traction transformers of CRH380B EMUs,sorts out the possible fault points and treatment schemes,and proposes solutions from the source and structure,which can ensure faster and more accurate subsequent maintenance to confirm the secondary ground fault points of the traction transformer of the EMU,and greatly reduce the occurrence of faults,so as to improve the fault handling and maintenance level of EMUs.
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