施工现场临时用电接地系统分析

陈   谦 王乐全（山东意匠建筑设计有限公司，济南市 250022）

Analysis on the Earthing Systems of Temporary Electrification on Construction Site

CHEN Qian WANG Lequan（Shandong Yijiang Architecture Design Co.,Ltd.,Ji’nan 250022，China）

Abstract：Starting from the evolution of earthing systems,the characteristics and application sites of TT system are mainly discussed. From the perspective of electrical safety,it is considered that TT system should be selected on the construction site,and the requirements for earthing systems in current relevant codes are discussed,so as to achieve the purpose of improving the electrification safety on the construction site.

Key words：TT system;TN system;construction site;earth fault;earth resistance;protective earth conductor;residual current operated protective device;equipotential bonding

摘　要：从接地系统的演变出发，重点讨论TT系统的特点和应用场所。从电气安全的角度，认为施工现场应选择TT系统，对目前相关规范中接地系统要求展开讨论，达到提高施工现场用电安全的目的。

关键词：TT系统;TN系统；施工现场；接地故障;接地电阻；保护接地导体；剩余电流动作保护器;等电位联结

中图分类号：TU852     　　　　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2021.05.003