... 4. UPS, ECO, EPS Mode Three Phase Double Conversion AC power uninterruptible power supplies (UPS) 1.Brief ... time0ms(adopted static switch )protectioninputvoltage,frequency ultralimit,phase wrong,phase lost outputovercurrent, short circuit, power factor lowEconomic ... Production Range: UPS, three phase (10kva~800kva), single phase(300va~20kva), three phase in and single phase out(6kva~80kva), online ...