... more reliableFull protection, overload, over voltage, short circuit, over temperature etcCold startGenerator compatibleWith RS232 and ... static switch )protectioninputvoltage,frequency ultralimit,phase wrong,phase lost outputovercurrent, short circuit, power factor lowEconomic running ... Range: UPS, three phase (10kva~800kva), single phase(300va~20kva), three phase in and single phase out(6kva~80kva), ...