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对直击雷、感应雷、雷电浪涌进行了分析,重点论述了感应雷、雷电浪涌对弱电设备的危害。综合当今先进防雷技术理论,对铁路信号设备防雷系统提出了围绕信号楼增设网状接地,以达外部防护;使用导电良好的镀铜条在信号顶面和四周构成屏蔽接地栅,并与接地网连接;室内各类地线、窗栅、金属管线接地栅,实行等电位连接;电源线路入口并接过电压保护器件;信号线路入口串接过电流保护器件;数据通信和测控技术的接口电路可采用光纤电缆作为数据传输线的防雷改进建议。
The direct lightning, lightning induction, lightning surge were analyzed, focusing on the induction of lightning, lightning surge on the weak equipment. Based on the current advanced lightning protection technology theory, a lightning protection system for railway signaling equipment is proposed to add reticular grounding around the signal building so as to achieve external protection. A well-conductive copper plating strip is used to form a shield grounding grid at the top and the periphery of the signal, Earthing network connection; indoor all kinds of ground wire, window grille, metal pipeline grounding grid, the implementation of equipotential connection; power line entrance and take over the voltage protection devices; signal line in series with overcurrent protection devices; data communications and monitoring technology interface The circuit may adopt the optical fiber cable as the lightning protection improvement suggestion of the data transmission line.