... performance,such as high efficiency ,energy saving,high starting torque,low noise,slight vibration,reliable operation and easy maintenance,etc.3 ... conditions Ambient TemperatureAltitudeRated VoltageRated FrequencyWorking DutyConnectionProtection ClassInsulation ClassCooling Method -15°C~40°Cnot exceed 1000 Meters380Vor any voltage requested50Hz/60HzS1(Continuous)Star ...