Discussion on Setting of Class Ⅰ Test SPD of Low-voltage Distribution System for Civil Buildings

Ye Chong（Guangzhou Design Institute，Guangzhou 510620，China）

 

    Abstract Based on the second class of structures to be protected against lightning with low-voltage cables buried introduction，the calculation of partial lightning current generated by resistance coupling；class Ⅰ test and testing waveform of SPD；parameters of voltage switching type，voltage limiting type，combination type class Ⅰ test SPD；setting of backup overcurrent protection of class Ⅰ test SPD are discussed.

    Key words Class I test SPD Resistance coupling Partial lightning current     Backup overcurrent protection

 

    摘 要 以低压电缆埋地引入的第二类防雷建筑物工程为例，探讨阻性耦合产生分雷电流的计算；SPD的I级试验和试验波形；电压开关型、限压型及组合型I级试验SPD的参数；I级试验SPD后备过电流保护设置等问题。

    关键词 I级试验SPD 阻性耦合 分雷电流   后备过电流保护