What is the principle of underground high voltage cable fault locating? The principle of underground high voltage cable fault locating involves using various techniques and methods to identify the location of faults in underground cables. There are s

VLF hipot and VLF testing is as simple as an AC hipot on lower frequency output (at 0.1 Hz). The only way to field test high capacitance loads with AC voltage, like cables and motors/generators, is to use a VLF AC hipot. Lower the frequency, Lower w

What is difference between Partial discharge and corona? Partial Dischargeusually begins within voids, cracks, or inclusions within a solid  dielectric , at  conductor -dielectric interfaces within solid or liquid dielectrics, or in bubbles