Current Transformer, Energy Meter Calibration, Power Quality Analyzer manufacturer / supplier in China, offering GF302D Three Phase Automatic Energy Meter Test Set Calibrator with Precision 3 Phase Standard Source 120A/600V 0.05 Class, GF302D Portable Three Phase Kwh Meter Test Equipment, GF302D Portable Meter Test Equipment Used to Test Each Kind of Single/Three Phase Kwh Meter of Industries and so on.