TN配电系统电源侧直接接地和一点接地探讨  

Study on Direct Grounding and One Point Grounding of Power Supply Side in TN System

作　　者：田自龙 TIAN Zilong(Power China Northwest Engineering Corporation Limited,Xi’an 710065,China)

机构地区：[1]中国电建西北勘测设计研究院有限公司,陕西西安710065

出　　处：《现代建筑电气》2023年第11期20-26,共7页Modern Architecture Electric

摘　　要：简单介绍接地系统不同功能导体的定义和作用,重点介绍单电源TN配电系统电源侧接地、多电源TN配电系统电源侧直接接地和一点接地、变电所和柴油发电机房毗邻和远离情况下多电源TN配电系统电源侧直接接地和一点接地。分析杂散电流流通路径及治理杂散电流的方法,阐述PEN在低压柜内无须包以绝缘。The definition and function of different function conductors in grounding system are introduced briefly.This section describes the power side grounding of a single-power TN distribution system,the direct and one-point grounding of the power side of a multi-power TN distribution system,and the direct and one-point grounding of the power side of a multi-power TN distribution system when a substation and a diesel generator room are adjacent to or far away from each other.The flow path of stray current and the method of controlling stray current is analyzed.The PEN does not need to be insulated in a low-voltage cabinet.

关 键 词：中性点 直接接地 TN配电系统 杂散电流 电磁兼容性 四极开关 三极开关 

分 类 号：TU852[建筑科学]