... sine wave output 3. With manual bypass 4. UPS, ECO, EPS Mode Three Phase Double Conversion Online ... frequency50Hz±10%,60Hz±10%Input overtone current6pulses rectifier<30% 12pulses rectifier plus filter <5%Charge modeConstant current ... time0ms(adopted static switch )protectioninputvoltage,frequency ultralimit,phase wrong,phase lost outputovercurrent, short circuit, power factor lowEconomic ...