Grounding Fault Protection and Short Circuit Protection for Road Lighting

Qian Sulan（The Fifth Institute of Project Planning & Research of Machinery Industry，

Tianjin 300190，China）

    Abstract This paper discusses different types of earthing for the distribution system as well as the protection of distribution lines for road lighting，points out the characteristics of each type of earthing as well as their respective problems. It also provides quantitative basis for road lighting design by calculation and comparison based on instances.

    Key words　Road lighting　Short circuit protection Grounding fault protection　Leakage current　Sensitivity Equipotential bonding

 

    摘　要　探讨道路照明配电系统的接地形式和配电线路的保护，指出不同接地形式的特点及不同接地形式下存在的问题，并通过实例进行计算比较，给道路照明配电设计提供量化的依据。

    关键词　道路照明　短路保护　接地故障保护　泄漏电流　灵敏度　等电位联结