Research on surge protection technology of coal mine safety monitoring system

The conventional surge protection technology was introduced. Based on theoretical research and standard test of electromagnetic compatibility surge protection technology in coal mine safety monitoring system, it was indicated that the conventional surge protection technology had certain unsuitability to coal mine products. Two major conflicts were focused on, which were between the conventional common-mode surge protection technology and insulation withstand voltage requirements of coal mine equipments as well as the conventional system-level surge protection design and intrinsic safety requirements of coal mine electrical equipments. The two conflicts were analyzed in principle and corresponding solutions were given finally.