... water supply and drainage and other industries, to achieve variable speed operation and optimized control of middle-voltage motor. ... and are suitable for various industrial sites including:Power PlantBelt conveyor, Draught Fan, Blower, Dust Suction Blower, Compressor, ... and waste-removal pumpCoal MineMain Hoist, Chippy Hoist, Belt Conveyor, Main Blower, Water PumpMetallurgyExhaust Fan, Dust Fan, Blower ...