摘要
民用建筑变电所内低压侧电源接地方式分为中性点直接接地和“一点接地”,具体采用哪种接地方式,需根据配电系统电源的位置、低压出线的接地制式要求以及系统是否会产生杂散电流来进行选择。为防止杂散电流和电磁干扰,接地方式的不同还会影响进线断路器和母联开关级数的选择。分析了目前民用建筑配电低压侧中性点应采用的合理接地方式,并提出了推荐方案。
The grounding mode of low voltage power supply in civil building substation is divided into neutral point direct grounding and one-point grounding.The grounding mode should be selected according to the power supply position of the distribution system,the grounding system requirements of the low voltage outgoing line and stray current or not.So as to prevent stray current,the different grounding mode will also affect the selection of the series of incoming circuit breaker and busbar switch.This paper analyzes which reasonable grounding mode should be adopted for neutral point of low voltage side of power distribution in civil buildings at present,and puts forward the recommended scheme.
作者
叶兴
YE Xing(Tongji University Architectural Design(Group)Co.,Ltd,Shanghai 200092,China)
出处
《现代建筑电气》
2021年第5期25-30,73,共7页
Modern Architecture Electric
关键词
民用建筑
中性线电流
一点接地
中性点直接接地
civil building
neutral current
one-point grounding
neutral point direct grounding
