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铁路信号电源系统SPD有效防雷连接问题的研究

, PP. 54-57

Keywords: 信号电源,SPD,连接线长度,连接线截面,工程优化接线

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Abstract:

电源防雷箱的合理接线对信号电源系统的防雷十分关键。针对防雷接线的电路模型进行计算分析,计算数据表明:连接线长度和截面大小会大大影响加在信号电源上的残压分布。得出连接导线的正确选用对充分发挥SPD防雷保护功能的重要性,通过工程优化接线提出了较好解决缩短SPD支路线缆的长度办法:一般要求接线总长度小于0.5m;并对连接导线的截面选择提出了合理建议:在LPZ1区和LPZ2区或更高防护区交界处选用截面积至少6mm2的SPD连接导线。

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