道路照明中接地形式与接地故障防护措施选择探析  

Analysis of Grounding Form and Grounding Fault Protection Measures in Road Lighting

作　　者：欧良新 OU Liangxin(Fujian Provincial Institute of Architectural Design and Research Co.,Ltd.,Fuzhou 350001)

机构地区：[1]福建省建筑设计研究院有限公司,福建福州350001

出　　处：《福建建筑》2023年第5期139-142,共4页Fujian Architecture & Construction

摘　　要：对道路照明工程中电击事故原因进行分析,探讨现行我国道路照明的接地形式,以及所对应的接地故障防护措施的选择。研究结论为:TN-S接地系统应严格根据供电距离,校验过电流脱扣器的灵敏度以及短路电流断路器动作的灵敏度。TT接地系统中,应严格根据供电距离,整定剩余电流动作保护器整定电流。同时,通过计算两种接地系统在道路照明远距离低压配电时的线路末端接地故障电流,选用最适用的接地故障防护措施。保障生命财产安全。Analyze the causes of electric shock accidents in road lighting engineering,explore the current grounding forms of road lighting in China,and select corresponding grounding fault protection measures.The research conclusion is that TN-S earthing system should verify the sensitivity of the overcurrent release and the sensitivity of the action of the short-circuit current circuit breaker strictly according to the power supply distance.In TT earthing system,the setting current of residual current operated protector shall be set strictly according to the power supply distance.At the same time,the most suitable ground fault protection measures are selected by calculating the line end ground fault current of the two earthing system in the remote low-voltage distribution of road lighting.Ensure the safety of life and property.

关 键 词：接地故障防护 TN-S接地系统 TT接地系统 选择性断路器 剩余电流断路器 

分 类 号：TU994[建筑科学—市政工程]