TN-S系统中金属低压电缆桥架的接地配置探析  

Analysis of the Earthing Arrangement of Metal Low‑voltage Cable Tray in TN-S System

作　　者：李沛岩 王梦梦 吕许光 LI Peiyan;WANG Mengmeng;LV Xuguang(ARTS Group Co.,Ltd.,Beijing 100044,China;China Architecture Design&Research Group,Beijing 100044,China)

机构地区：[1]中衡设计集团股份有限公司,北京市100044 [2]中国建筑设计研究院有限公司,北京市100044

出　　处：《建筑电气》2023年第5期61-66,共6页Building Electricity

摘　　要：根据对桥架相关规范的分析,确定在TN-S系统中金属低压电缆桥架是外露可导电部分。在工程上,桥架的接地配置要按外露可导电部分采取措施,对桥架发生的接地故障,要采取合适的排查或消除故障的方法。According to the analysis of relevant specifications for cable tray,it is determined that the metal low‑voltage cable tray in TN-S system is an exposed conductive part.In engineering,measures shall be taken for the earthing arrangement of the cable tray according to the specifications of the exposed conductive parts.For the earth fault of the cable tray,appropriate troubleshooting or fault elimination methods shall be taken.

关 键 词：钢制电缆桥架 TN-S系统 外露可导电部分 外界可导电部分 保护等电位联结 接地配置 保护接地导体 

分 类 号：TM757[电气工程—电力系统及自动化]