Hipot Tester, Insulation Resistance Tester, Oil Tester manufacturer / supplier in China, offering 0.1Hz Vlf High Voltage Cable Testing Machine up to 30kv, IEC60156 Dielectric Strength Testing Machine 70kv Transformer Insulation Oil Bdv Test Kit, 10kv Electric Insulation Resistance Tester/Digital High Voltage Megohm Meter and so on.