The most common field tests performed on cables are dc hi pot or vlf tests instead of ac hi pot tests. Dc testing has also been shown to reduce the remaining life of cables with aged polymer insulation. Acceptable procedures for conducting hi pot testing although varying slightly in technique have been standardized as either a withstand test or a time leaking current test ieee std 400 provides additional information on dc testing and evaluation of the insulation of shielded power cable systems.
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