随着我国铁道建设事业的迅速发展，10kV自闭供电系统在不断地扩大，哈分局管内自闭供电线已达584.3km，占哈局自闭电力线总数的56．9％．其中，除哈长线外，自闭区段均已发展为双回线供电．自闻电力经承担着向自动闭塞信号点及沿线各站电气集中供电任务，其防雷水平如何，直接 With the rapid development of China’s railway construction, 10kV self-closing power supply system is constantly expanding. The self-closing power supply line in Harbin branch has reached 584.3km, accounting for 56.9% of the total number of autonomous power lines in Harbin. Among them, in addition to ha long lines, the autistic section have been developed into double loop power supply. Self-learned power by the commitment to automatically block the signal point and the station along the electrical centralized power supply task, the level of lightning protection, direct