1.3-phase motor/inductance, transformer winding impulse measurement 2 ... craft etc., coil product (such as transformer, motor…etc.) can generate debasement of the insulation performance ... settings (Area, Differential Area, Corona Discharge, Differential Phase etc. ), then judges if the coil winding is ... mainly used to measure three-phase 3-wire or three-phase 4-wire motor with three windings. Measured ...