控制柜间接接触防电击保护  

Indirect Contact Protection Against Electric Shock of Control Cabinet

作　　者：谭胜容 TAN Shengrong(Zhejiang Supcon Technology Co.,Ltd.,Hangzhou 310053,China)

机构地区：[1]浙江中控技术股份有限公司,浙江杭州310053

出　　处：《电工技术》2020年第10期72-74,共3页Electric Engineering

摘　　要：文章从人体电击电流和接触电压与最大持续时间关系开始分析,较为系统地阐述了DCS项目在低压电源采用不同接地形式的自动切断电源保护措施,重点分析了常见的TN系统和TT系统等电位接地联结时,采用空气开关进行接地故障保护能否满足间接接触防电击要求,以及不满足时推荐的其他措施,以供工程人员参考。Starting with the analysis of the relationship between the human body electric shock current and contact voltage and the maximum duration,this paper systematically explains the DCS project using automatic power-off protection measures with different grounding types in the low-voltage power supply,and focuses on analyzing whether the use of the air switch for ground fault protection can meet the requirements of indirect contact protection against electric shock when the common TN system and TT system are connected to the equipotential ground,and other measures recommended when it is not satisfied,for the reference of engineering personnel.

关 键 词：控制柜 防电击 低压电源 保护电器 

分 类 号：TM642.2[电气工程—电力系统及自动化]