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轨道交通信号系统分布范围广,自动化程度高,容易遭受雷击侵害。分析了信号设备室电源电涌保护器参数选择时需要考虑的防雷分级情况,介绍了防雷冲击通流容量(标称放电电流)参数选择及其安全系数的确定。
A wide range of rail transit signal distribution system, a high degree of automation, vulnerable to lightning strikes. This paper analyzes the lightning protection grade to be considered in the parameter selection of power surge protector in signal equipment room, and introduces the selection of lightning surge current capacity (nominal discharge current) and the determination of its safety factor.