... load)bypass Switching time0ms(adopted static switch )protectioninputvoltage,frequency ultralimit,phase wrong,phase lost outputovercurrent, short circuit, power factor lowEconomic running modeEconomic mode available ... low-frequency and large power UPS.Production Range: UPS, three phase (10kva~800kva), single phase(300va~20kva), three phase in and single phase out(6kva~80kva), online ...