... indicate three prases separately,and a shift switch & voltage meter to shift and survey each phase.Model(KVA):1,5,3,4.5 ... ,6,9,15,20,30,50,60Input Voltage:Three-Phases 280-430VOutput Voltage:Three-Phases 380V±3%Phase:Three ... -PhasesFrequency:50/60HzResponse Time ...