Transformer Tester, Insulation Tester, High Voltage Test Set manufacturer / supplier in China, offering HV HIPOT GDVLF-60S 60KV 50KV 40KV 0.01Hz AC VLF Tester for Cable, HVHIPOT GD3126E 15kV 20kV Portable Insulation Resistance Tester, HVHIPOT 5000A Long Time Running Digital Primary Current Injection Test Set and so on.