Hipot Tester, Insulation Resistance Tester, Oil Tester manufacturer / supplier in China, offering 500kv Resonant Test Set with Frequency Conversion Power Supply Excitation Transformer, ASTM D924 Automatic Cleaning Transformer Oil Tan Delta and Resistivity Tester, Fully Functional Hzjf-9003 Pd Partial Discharge Tester Handheld Partial Discharge Detector and so on.