What's the difference between DC and AC HiPot Testing? Is there any multiplier or percentage on a given utilization voltage to apply such test? Any advantage?
We apply DC HiPot Test on an 11KV Cable applying 22 KV and it passed but when we applied AC HiPot test it failed. The cable is 350 meters long and with 2 splices along the cable.It failed on the AC HiPot that when we were gradually increased the AC voltage,it failed at an even low 200 VAC with 12mA Leakage Current injected.Does capacitance of long cable has to do something with this?Can repeated test destroy the insulation of the cable?