DIN CLC/TS 61643-12-2007 低压电涌保护装置.第12部分:与低压电力系统连接的电涌保护装置.选择和应用原则
Low-voltage surge protective devices - Part 12: Surge protective devices connected to low-voltage power systems - Selection and application principles (IEC 61643-12:2002, modified); German version CLC/TS 61643-12:2006