铁路信号系统智能化、集成化和数字化是迈向高速时代的中国铁路发展方向.对于信号设备的防雷和浪涌保护越来越至关重要.按照现代防雷要求,科学合理选择和安装SPD可以降低在雷电条件下设备发生故障的概率,提高设备运行的可靠性与安全性.%Intelligent, integrated and digital railway signal system is the development trend of China railway at the high-speed era. The lightning protection and surge protection is more and more important. On the request of modern lightning, scientific and reasonable choice and installation of SPD can reduce the probability of equipment failure when lightning, and improve the reliability and safety of equipment operation.
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