One purpose

BQD84Z-30、 The 60 mine explosion-proof vacuum electromagnetic starter is suitable for use in coal mines with explosive gas and coal dust explosion hazards. It is used for starting, stopping, or reversing control of three-phase squirrel cage asynchronous motors (small water pumps, local ventilation fans) in power supply systems with AC 50Hz and voltage of 660V or below for local or remote control.  

Two functions

By combining dialing and gear setting, the rated current can be modified;  
It has protection functions such as short circuit, overload, phase failure, overvoltage absorption, and leakage lockout;
Reversible starters have remote control for forward and reverse rotation.  

Technical Parameters and Specifications of Three BQD84Z-30, 60 Mining Explosion proof Vacuum Electromagnetic Starter