朔黄线特大桥信号电缆雷电及牵引电流的综合防护

Comprehensive Protection of Lightning and Traction Current of Shuohuang Very Long Bridge Signal Cableburns

分析了朔黄线特大桥信号电缆烧伤的原因;对其信号电缆采取增设专用地网、贯通地缆,"分段单端接地",强、弱电分地、电缆绝缘包裹等技术措施,对雷电及牵引电流进行综合防护;并对实施状况组织了测试和评估。

This paper analyzes the reasons why the signal cable of the very large bridge on Shuohuang line was burnt. Corresponding measures were taken to offer comprehensive protection against lightning and traction current, including adding special earthing network and cut-through earthing cable, sectional single end grounding, separate grounding for strong points and weak points, cable insulation wrapper and other technical measures. The implementation status of those measure were tested and evaluated.