3 phase power saver, saving for commercial use Applications:Shop,house,restaurant,office,factory,cyber-café,etcTechnical Specifications:Maximum load limit: 50 KWVoltage: 220-400 VAC, 50-60 HzOperating temperature: -15 to 60 Celsius degreesHumidity:<85%Altitude:<2000m3 phase (also useful for 1 phase ,2 phases and 3 phases)