Abstract: Main Fan is a major mine safety equipment , for the normal operation of the main fan is directly related to the safty of normal production and that of mine workers. Ventilation electrical control system mainly consists of high frequency control system, PLC control system, intelligent host monitoring systems, high and low voltage distribution systems. This paper focuses on the design of electrical control system, whichincludes the block diagram and functions of the system. Besides, the device-dependent parameters of the system are also discussed.

Key words: Main fan, high-voltage inverter, PLC control system, intelligent host monitoring system, high and low voltage distribution system