Input voltage:280V-415V(3-phase,4-lines) Output voltage: 400V(3-phase,4-lines) Frequency(Hz): 50-60 Adjusting time(s):≤(3-6)s when the input voltage changes within the range of 20V Harmonic distortion: No additional distortion Efficiency: >90% Rated impulse withstand voltage: 1500V(in cold status,1 min) Insulation resistance:≥5MΩ Power factor: 80%