Voltage regulator 450kw 1.Voltage regulator 2.Voltage regulator Input voltage: 265~495V 3.CE, ISO, VDE test report. Voltage regulator 450kw1.Input voltage: 265~495V2.Input frequency: 30~70Hz 3.Output voltage: 220V/380V±0.5% 4.Output frequency: 50Hz±0.01% 5.Wave distortion: <1% 6. Isolation transformer output, safe and credible7. Auto-protection and alarm for output over voltage, over current, ...