https://www.acinverters.com/products/220v-single-phase-to-380v-three-phase-converter/ Anchuan 220V Single Phase to 380V 3 Phase Converter The single phase VFD 220V to 380V three-phase converter is an electrical device that converts the current of one frequency into the current of another frequency. There are strong demands on the inverter's technology and reliability because the AC900 has a 220V input and a 380V output, with variable voltages before and after conversion. Changing the speed of the motor feeding the pump and fan prolongs the equipment's service life.All Rights Reserved