●The AVR accumulates and unloads 60% of the rated current and a three-phase symmetrical load with a power factor not exceeding 0.4 (hysteresis) at no-load conditions of rated speed and near rated voltage. When the voltage drops, its transient voltage regulation rate should be no more than 1 5%. When the voltage rises, its transient voltage regulation rate is not more than 20%, and the voltage recovery time does not exceed 1S.