... 5.IGBT inverter,RS232,SNMP Online Low Frequency UPS Power Supplies:· True online and double conversion design ... Low battery, Bypass, Overload, FailureLCDLCD indicates voltage,frequency, battery,load,temp.ProtectionAlarmAC Abnormal/Battery low voltage ... more than 1 minutesOutput power factor0.8Transfer time to bypass0msInput frequency track<=1Hz/SCommunicationInterfaceRS232/dry contactEnvironmentAmbient ...