... regulates the voltage from 0~220 V 3.energy-saving three phase voltage regulatorApplicationTDGC2, TSGC2, TDGC2J, TSGC2J series voltage regulator ... purposes.It is widely used in chemical, metallurgy, instrumentation, electrical and mechanical manufacturing, light industrial, scientific experiments, utilities, household ... it is an ideal AC voltage regulator power supply. three phase voltage regulator