Medium voltage inverters generally refer to those with voltages of 660V~690V and 1140V. Currently, medium voltage inverters are applied in fields such as urban water supply, submersible oil pumps in oilfields, water injection pumps, pumping units (nodding donkeys), main shaft fans in coal mines, belt conveyors, coal mining machines (explosionproof), etc., achieving good economic benefits.

High voltage inverters (referring to voltages greater than 1140V) are widely used as energysaving and speedregulating devices for high voltage motors in high energyconsuming industries such as metallurgy, electric power, water supply, petroleum, chemical industry, and coal mining. High voltage inverters are widely applied to pumptype loads in industries like metallurgy, chemical, electric power, municipal water supply, and mining, capable of driving fans, pumps, compressors and various other loads, accounting for about 40% of the energy consumption of all electrical equipment. By using high voltage inverters, high voltage motors can achieve stepless speed regulation, meeting the requirements of motor speed control in production processes while significantly saving energy and reducing production costs.