道路照明系统的接地型式及低压配电保护

Grounding Modes of the Road Lighting System and Low Voltage Distribution Protection

通过城市道路照明低压配电系统不同接地型式发生间接接地故障时预期接触电压的分析,提出难以实现等电位联结的户外环境中必须利用重复接地降低预期接触电压;探讨了如何进行道路照明低压配电保护开关的选择。

Based on the analysis of the expected contact voltage when indirect ground fault occurs in different grounding modes of low-voltage distribution system of urban road lighting,this paper puts forward that in outdoor environment where it is difficult to realize equipotential bonding,it is necessary to use repeated grounding to reduce the expected contact voltage,and discusses how to select the protection switch for low-voltage distribution of road lighting.