Genset Model KWC-640GF Prime Power (50Hz) 800KVA /640KW Standby Power (50Hz) 880KVA/704KW Frequency/Speed 50Hz/1500rpm Standard Voltage 230V/400V Effective Voltage 220V/380V Phase 3 Phase,4 Wire Steady-state voltage regulation rate,±1.0% Steady-state frequency adjustment rate ±5% Steady-state voltage fluctuation rate,±0,5% Steady-state frequency fluctuation rate ±0.5% Transient-state voltage regulation rate -15% to +20% Transient- state frequency regulation rate -10% to +10% Voltage stabilization time 1sec Frequency stabilization time 3sec Manufacturer Qingdao Kingway Industry Co.,Ltd.