... UPS 20KVA 1,low frequency online ups 2,IGBT technology 3.,OEM is accepted and Factory price Low Frequency UPS ... in 125%, 30 minutes in 110%Wave crest factorBetter than 3 : 1Waveformsine waveEfficiencyAC TO AC0.95LCD displayDisplay Infostatus display, voltage ... 232 DB9Safety StandardIEC 146-4 , IEC 810-1/3/4,IEC1000-4-2/3/4Monitoring SoftwareUPSilon2000Noise (@1m)≤53dBA≤60dBA≤65dBAOperating TeTX.-5 ...