3+NPE模式电涌保护器在智能建筑电气设计中的应用

On the Application of 3+NPE SPD in Electric Design of Intelligent Building

通过对GB50057-94(2000版)《建筑物防雷设计规范》标准中电涌保护器设计图的分析,比较了RCD装在SPD的电源侧,和RCD装在SPD的负载侧的不同,得出当采用“3+NPE”模式进行保护时,由于NPE模块是一种放电间隙型模块,不会在线路中导致接地故障,因此可解决电涌保护器(SPD)安装位置受限制及高接地电阻地区电涌保护器(SPD)因串联断路器无法脱扣导致的烧毁等设计问题.

It is a new type of building tendency in the future. By analyzing the design of SPD, comparing RCD stalled in the electricity side of SPD with RCD in the load side,this paper comes to a conclusion that when people use the protecting pattern＂3 ＋ NPE＂ ,because it can＇t result in a touching ground fauh,NPE can deal with the limit of stalling SPD and many designing problems, such as the burning of SPD resulting from in series switch which is unable to escape in highly touching ground areas.