施工现场临时配电系统接地故障电流的应用  

Application of Grounding Fault Current in Temporary Power Distribution System at Construction Site

作　　者：赵建彬 Jianbin Zhao(Beijing Shougang Construction Group Co.,Ltd.,Beijing,100043,China)

机构地区：[1]北京首钢建设集团有限公司,北京100043

出　　处：《工程设计与施工》2023年第1期28-30,共3页Engineering Design and Construction

摘　　要：论文介绍施工现场临时配电系统中断路器作间接接触防护时,当系统发生接地故障,通过计算该系统接地故障电流的方法来确定铜芯电缆允许最大长度,以期为施工现场电气技术员及施工人员提供选择铜芯电缆最大供电半径的计算思路。This paper introduces that when the circuit breaker is used as indirect contact protection in the temporary distribution system on the construction site,when the system has a grounding fault,the allowable maximum length of copper core cable is determined by calculating the grounding fault current of the system,so as to provide the calculation idea of selecting the maximum power supply radius of copper core cable for electrical technicians and construction workers on the construction site.

关 键 词：施工现场 TN-S系统 等效电路 三级配电 三级保护 接地故障电流 供电半径 

分 类 号：TM7[电气工程—电力系统及自动化]