... price, good after-sale service (2), The largest manufaFrequency converte Drive, Inverter, Motor speed ControllerApplicationsMechanics, electronics, metallurgy, mining, petrochemical ... other industries and fieldsExhaust Fan in Coal MineProduct line: frequency inverter, servo motor and drive, soft starter, AC Choke, ... ~630kw380v~690v3 phase input& 3 phase output Drive, Inverter, Motor speed Controller