... Voltage unbalancedness:<3%, distortion rate satisfies the IEC61800-2 demandRated frequency50Hz/60Hz; Fluctuation range: ±5%OutputFrequency0Hz~ ... Self-adjusting, S curve acceleration/deceleration, slip difference compensation, fan operation control, Crawl function, jump ... communication, Drop control, Torque control, Switch between torque control and speed control, Restart automatically, Energy saving ...