Model QJR(4) Mine-used Flameproof and I.S. Soft and Magnetic Starter for Motor is the latest high- tech product which integrates soft starter and magnetic starter into a whole. Its microprocessor control unit uses advanced components of microprocessor, electric power and electronic technology and full digital non-speed vector control technology, so it has functions of soft start, soft stop, pump stop, etc., greatly eliminates mechanical and electrical shock and extends the equipment's life. The comprehensive protection unit for motor, with special anti-interference measures, has excellent protection functions of overload inversing time limit, over-current, open-phase and leakage locking. Model QJR(4) Starter is widely used for belt conveyor, pump, rope traction winch, crusher and so on.