... 0~220 V 3.energy-saving three phase voltage regulatorApplicationTDGC2, TSGC2, TDGC2J, TSGC2J series voltage regulator without a waveform distortion, small size, light ... experiments, utilities, household appliances, temperature control & speed adjust, dimming, and power control purposes, it is an ideal AC voltage regulator power supply. three phase voltage regulator