Polling Design of High-voltage Comprehensive Protection Device Based on PLC

In this paper, it took high-voltage switch comprehensive protection device of the main fans in coal mine as the example. By using a reliable programmable logic controller (PLC), it achieved communication between PLC and comprehensive protection device of high-voltage motors switchgear and realized the remote monitoring and control of high-voltage switchgear with PLC, which improved automated management level of coal mine equipment, and provided a reliable basis for the management and maintenance of the equipment.