SBW full automatic compensated voltage stabilizer/Voltage regulator/voltage optimizer/voltage regulation/voltage optimiztion Power range:20KVA-2000KVA Phase:Single phase/Three phase Single phase products input voltage & output voltage Input voltage: 220V±20%(176-264V) or 220V±30%(154-286V) Output voltage: 220V±3% Custom made products in special input voltage & output voltage is available Three phase products input voltage & output voltage Input voltage:380V±20%(304-456V) or 380V±30%(266-494V) Output voltage:380V±3% Custom made products in special input voltage & output voltage is available Frequency:50Hz/60Hz Efficiency:≥98% Output voltage accuracy:±3% Ambient temperature:-10~40°C Wave form distortion:No additional waveform distortion Protective function:Over voltage,over current,phase shortage and phases-sequence protection Response speed:≤1S We are the truly factory,Please not hesitate to contact us !