QJZ vacuum electromagnetic starter is mainly suitable for underground coal mine, as the starting and stopping of mine flameproof three-phase squirrel-cage asynchronous motor with remote or direct control of AC 50Hz and voltage up to 1140V. It can also perform commutation operation on the control power supply of the motor when it is stopped. The starter has the functions of overload, phase failure, short circuit, leakage blocking and overvoltage absorption protection.Rated voltage (V): 380, 660, 1140 Rated current (A): 30, 60, 80, 120, 200，400 Control motor power (KW): ≤370 Remote control cable length: ≤350m Product features of QJZ vacuum electromagnetic starter: 1. The main circuit of QJZ vacuum electromagnetic starter adopts vacuum contactor, which has no arc, long life and high reliability. 2. The JDB motor comprehensive protector is adopted, and the protection function is complete. 3. QJZ vacuum electromagnetic starter has simple structure and less maintenance. 4. The starter can be controlled by near control or by liquid level control by remote control. The use environment of QJZ vacuum electromagnetic starter: 1. The altitude does not exceed 2000 meters. 2. The ambient temperature is -20℃～+40℃. 3. The relative humidity is not more than 95% (25℃). 4. In the environment with gas, coal dust and explosive gas mixture. 5. In the gas or steam environment without damaging the insulation. 6. Places without severe vibration and shock. 7. Places that can prevent dripping water. 8. The vertical plane should be installed in places where the inclination does not exceed 15 degrees. 9. Pollution level 3.