1,High Frequency Online UPS 2,IGBT technology 3,VAR,Overload and short circuit protection 4,OEM is accepted and Factor price Online UPSHigh Frequency Online UPSNO Break ... (40~60)Hz(adjustable)Output Voltage220 VAC+2%Frequency When the public power input frequency is 46~54Hz, it is synchronous with ... public power supply, if exceeding the range, the output frequency is 50×(1+0.2%) Hz50´(1+0.2%)Hz ...