赵 安（中国航空规划设计研究总院有限公司，北京市 100120）

Brief Analysis of Selection of Cross‑sectional Area for Outdoor Road Lighting Cables

ZHAO An(China Aviation Planning and Design Institute(Group)Co.,Ltd.,Beijing 100120，China)

Abstract：Based on practical cases,the paper elaborates that it is required to consider not only the current‑carrying capacity and line voltage drop on cables but also the protective sensitivity of circuit breakers when the cross‑sectional area is selected for outdoor road lighting cables. By analyzing the factors affecting the protection sensitivity of circuit breakers, it has proposed suggestions for selecting the cross‑sectional areas of outdoor road lighting cables.

Key words：outdoor road lighting;cable cross‑section;line voltage loss;power supply distance;line‑to‑neutral short‑circuit fault;protective sensitivity; RCD;leakage current

摘　要：结合实际案例，阐述选择室外道路照明电缆截面积时，除考虑电缆载流量及线路电压损失外，还应考虑断路器的保护灵敏性，通过分析影响断路器保护灵敏性的因素，提出室外道路照明电缆截面积的选择建议。

关键词：室外道路照明；电缆截面积；线路电压损失；供电距离；相线与中性线短路故障；保护灵敏性；RCD；泄漏电流

中图分类号：TU852                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.05.011