... , TH2882AS-5 compares standard waveform and tested waveform according to criterion of settings (Area, Differential Area, Corona Discharge, ... precision testing method, flexible operation method and various interfaces to offer test solution for most coil winding manufactories. The ... area difference, phase difference, corona)TH2882AS-5 is mainly used to measure three-phase 3-wire or three-phase 4-wire ...