The HiPot test demonstrates that the ground wall insulation system can withstand a
“high” applied voltage without exhibiting an extraordinarily high leakage current or
actually breaking down. The test consists of applying a DC voltage to the windings of the
machine, same as a Megohm test, but at a higher voltage – usually more than twice the
voltage of the machine’s operating voltage. Therefore, the HiPot test is often called a7
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“Proof” test. The insulation resistance value at the high applied voltage is not of interest
with the HiPot test. However, the value of the leakage current is and, more specifically,
whether or not the observed leakage current is within acceptable limits