The high voltage test (also called dielectric strength test or hipot test) can be made in AC or DC. If the high voltage test is made in DC, it is then combined with insulation ; if the high voltage test is made in AC, it is then, this is then, more stressful for the sample and made according to the sketch below.
Measurement of high voltage test under alternating current is performed using an alternating voltage (50Hz) adjustable to an effective 50V to 1,500V. As is the case with direct current, the high voltage test detects any sudden rise of current up to a programmed threshold.
The short circuit test is maintained by default. The rise time is more than 500 ms and the application time at least one period.
Warning: The high voltage test under alternating current is penalised by the capacitive value of the tested equipment. It must be remembered that the generator power is limited to 5 mA.
Below video will explain the detailed test of High voltage testing