Specifications 20kVA Input Phase Three phase Voltage AC 280~430V AC 304~456V Frequency 50 Hz Output Voltage 380�± 3 % (Adjustable) Capacity 16kW 24kW 32kW 48kW 72kW 80kW Frequency 50Hz Protection Under volt AC 318 �± 7 % Over volt AC 426 �± 7 % Delay 3-7 sec/3-7 Min (Optional) Over load Yes Bypass Manual Short phase Yes Cooling system Natural Cooling System Efficiency AC-AC > 95% Environment Humidity 20 % to 90% Temperature -50 C ~450 C Control System Step less control with servo motor, Individual phase control