辅助等电位联结设计探讨

Discussion on Design of Supplementary Equipotential Bonding

通过TN接地系统的接地故障电流、接地故障电压、故障电压传导等分析,阐述间接接触防护自动切断电源的条件以及设置辅助等电位联结的必要性和有效性,得出辅助等电位联对接地故障电流大小影响,并强调设了辅助等电位联结后,还应校验间接接触保护电器的动作特征能否满足要求。

By analyzing the earth fault current,earth fault voltage and fault voltage conduction of the TN grounding system,elaborating on the conditions of automatically power off by indirect contact protection as well as the necessity and effectiveness of setting up the supplementary equipotential bonding,it is concluded that the supplementary equipotential bonding has an effect on the earth fault current,and it is emphasized that after the supplementary equipotential bonding being set,it is necessary to check whether the action characteristics of the protective appliances in indirect contact can meet the requirements.