... protection for alarm function and excellent input&output Undervoltage overflow, input surge, phase failure, battery overcharge and ... 25%PhaseThree phase +N+GFrequency50Hz/60Hz±5%Input power factor0.95(with input filter)Soft start0-100% 5secOutputVoltage220V/380, ... displayCommunication port(Optional)RS232, SNMP, dry-contactAlarmAlarm with buzzer and indicatorsEnvironmentTemperature: 0-40C Humidity: 0- ...