... conversion, IGBT technology, Advanced PFC technology, self-detection UPS, online UPS rack mount type, wide input range, dual conversion, ... (DC power on)8. Automatically charging batteries in UPS off mode9. Lighting and surge protections(surge energy ... 1 min.Current Crest Ratio3:1BypassAutomatic Transferon overload and UPS failureBefore UPS Power-onDefault NO, user adjustable to YESYesVoltage Range ...