Abstract: This paper introduces the general principle of the selection of signaling power wire section, analyzes the calculation principle of relay, signal lighting, track circuit, switch machine, switch indication and other power wire section, calculates and gives the corresponding reference value, which has a good reference for similar engineering design.

Key words: signal, equipment power supply, conductor section

摘要： 介绍信号电源导线截面选择的一般原则，分别对继电器、信号点灯、轨道电路、转辙机、道岔表示等电源导线截面的计算原则进行分析与计算，并给出相应的参考值，对类似工程设计有较好的借鉴、参考作用。

关键词: 信号, 设备电源, 导线截面