This paper analyzes the reasons for the insulation breakdown of a dry load cabinet from different per-spectives,and ultimately concludes that insulation breakdown is caused by intermittent grounding produced by con-densation water.This study also finds that for three-phase to ground insulation systems,intermittent grounding of one phase may cause the other two phases to generate high voltage several times more than the power supply voltage.
dry load cabinetthree-phase to ground insulation systemintermittent grounding
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维普
