TN接地系统短路保护灵敏度设计探讨  

Discussion on Design of Short-circuit Protection Sensitivity of TN Earthing System

作　　者：林信坤 LIN Xinkun(Fujian Jiangong Prefabricated Research Institute Co.,Ltd.,Fuzhou 350001,China)

机构地区：[1]福建建工装配式建筑研究院有限公司,福州市350001

出　　处：《建筑电气》2023年第8期16-20,共5页Building Electricity

摘　　要：根据低压配电线路短路保护灵敏度要求,分析提高低压配电线路短路保护灵敏度的主要措施。利用现有国家标准图集19DX101-1《建筑电气常用数据》有关数据,推导出方便快速判定TN接地系统低压配电线路短路保护灵敏度能否满足要求的方法。Based on the sensitivity requirements for short-circuit protection in low-voltage distribution lines,this article analyzes the main measures to improve theshort-circuit protection sensitivityyof low-voltage distribution lines.By utilizing the relevant data from the existing national standard atlas 19DX101-1 Common Data for Building Electrical Systems,a method is derived to conveniently and quickly determine whether the short-circuit protection sensitivity of TN earthing system in low-voltage distribution lines meets the requirements.

关 键 词：低压配电线路 单相短路 单相接地故障 短路保护灵敏度 树干式配电 链式配电 供电范围 等值阻抗 

分 类 号：TU852[建筑科学]