户外照明电击防护的几点建议  

Some Proposals on Electric Shock Protection of Outdoor Lighting

作　　者：樊浩 Fan Hao(China Northwest Architectural Design and Research Institute Co.,Ltd.,Xi*an 710018,China)

机构地区：[1]中国建筑西北设计研究院有限公司,西安710018

出　　处：《智能建筑电气技术》2022年第2期144-149,共6页Electrical Technology of Intelligent Buildings

摘　　要：探讨了户外照明配电系统的接地方式,建议户外照明装置的接触电压限值宜取AC 25V;分析了户外照明采用TN-S接地方式时,接地故障保护存在的问题;建议户外照明配电系统宜采用TT系统;采用TT系统和RCD保护时,灯具保护接地宜采用“共地”,RCD保护的额定动作电流应大于正常泄漏电流4倍,宜整定300mA及以上。This paper discusses the grounding mode of outdoor lighting distribution system,and suggests that the limit of contact voltage of outdoor lighting should be AC25 V. The problems of grounding fault protection are analyzed when TN-S grounding mode is adopted for outdoor lighting. TT system is recommended for outdoor lighting distribution system. When TT system and RCD protection are used,“Common ground”should be adopted for lamp protection grounding,rated action current of RCD protection should be 4 times larger than normal leakage current,and 300 mA or above should be set.

关 键 词：户外照明 电击防护 接地方式 TN-S系统 TT系统 剩余电流保护器(RCD) 接地故障 

分 类 号：TU88[建筑科学]