道路照明接地系统研究
樊永峰(厦门合立道工程设计集团股份有限公司,福建省厦门市 361006)
Research on Road Lighting Earthing System
FAN Yongfeng(Xiamen Hordor Architecture & Engineering Design Group Co.,Ltd.,Xiamen 361006,Fujian Province,China)
Abstract:A TN system is currently the dominant earthing system for road lighting,while a T T system is rarely used. The author attempts to qualitatively and quantitatively analyze the impact and harm` of fault voltage and stress voltage generated by earth fault in low‑voltage and medium‑voltage systems on personnel and electrical equipment,thereby providing a basis for peers to make judgments and choices.
Key words:earth fault;fault voltage;stress voltage;protection against electric shock;ungrounded system;low resistance earthing system;TN system;T T system
摘 要:当前道路照明接地系统以TN系统为主,TT系统鲜有被采用。笔者试图通过低压、中压系统发生接地故障时产生的故障电压与应力电压,对人员与电气装置的影响与危害,将二者作出定性与定量分析比对,供同行判断与选择。
关键词:接地故障;故障电压;应力电压;电击防护;不接地系统;低电阻接地系统;TN系统;TT系统
中图分类号:TM923 文献标识码:A
doi:10.3969 / j. issn.1003 - 8493.2023.04.009