Attention Should be Paid to the Calculation and Measurement of the Grounding Fault Loop Impedance

He Xiangkun（China Electric Design & Research Institute Co.，Ltd.，Beijing 100048，China）

作者信息

贺湘琨，男，中机中电设计研究院有限公司，教授级高级工程师；《低压配电设计规范》修订组负责人；全国建筑物电气装置标准化技术委员会秘书长。

 

    Abstract The calculation of grounding fault loop impedance is stipulated in the Code for Design of Low Voltage Electrical Installations. However，it has not been widely paid attention to and implemented. As this provision relates to personal safety，the author hopes that colleagues in the electrical engineering design industry and construction industry pay attention to the calculation and measurement of grounding fault loop impedance of the TN system.

    Key words　Grounding fault　Protection against electric shock　Automatic power off　Calculation and measurement of grounding fault loop impedance

摘　要　在《低压配电设计规范》中有对接地故障回路阻抗进行计算的规定，但至今没有得到广泛的重视和执行。由于这条规定涉及人身安全，作者希望我国电气工程设计界和施工界的同仁们，能够重视对 TN 系统的接地故障回路阻抗进行计算和测量。

    关键词　接地故障　电击防护　自动切断电源　接地故障回路阻抗的计算和测量