The DC Hi-Pot test checks the strength of ground
insulation. This test is conducted at high voltages to
measure the overall insulation dielectric strength. The
DC high voltage is uniformly applied between the
winding and ground. The leakage current, in micro
amperes is displayed on 3½ digital displays. The test
stops automatically if the leakage current goes over the
trip level.
DC HI-POT VOLTAGE =(2×E + 1000)
where E is the operating voltage
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