High voltage switchgear: its main function is to start and stop the main motor, to provide comprehensive protection for the motor; Real-time monitoring of power supply, motor current, motor temperature (windings, bearings, electrical body,), crusher rotor bearing temperature, etc., early warning when entering the set warning range, and immediate control of vacuum breaker action once the need for protective action conditions are reached; ABB/ Schneider high-voltage vacuum circuit breaker, Ethernet remote I/O data acquisition and switching and closing control; Set the isolation switch; Add a ground knife to avoid electric shock caused by inductive electricity during maintenance operations.