... 46~54Hz Output Voltage:220VAC +/- 1% Uninterruptable Power Supply(UPS) ProductOn Line UPS Parallel Redundancy (10 ... range304~478VACFrequency range46~54HzPhaseThree Pahse (4 Wires+Ground)Power factor0.95ConnectionHardwiredOutputVoltage220VAC ± 1%, Single phaseFrequency50Hz ± ... 0 msMaintenance bypass switch YesLED indicatorsStatusLoad level/Battery level, Battery,Utility power,Inverter, Bypass,Overload ...