1. Three phase in and out system, compatible with utility of 380 ... voltage±120VDCCharger power20%*PowerCharger voltage precision1%OutputVoltage precision±1% (balance load),2% (unbalance load)Output ... lower than 3.5mA, no flashover in 1 minuteSurge protectionComply with IEC60664-1 class IV, endure surge of 1.2/50us ... skype: lindayunyun true on line three phase in three phase out 15KVA UPS