... / 3 phaseRated Voltage (V):380~480 (±0.5%)(AC)Type3 phase/4 wire, brushless, automatic voltageregulator, drip proof ... ,protected type.Frequency (Hz)50Efficiency:89.9%Voltage regulation± 0.5 %( ... method:wind-cooling, self-heat-rejectionVoltage regulating modeAutomatic voltage regulatorCompliant with international standards:IEC 60034-1, NEMA ...