Switches for household and similar fixed electrical installations Part 2-1: Particular requirements - Electronic switches (IEC 60669-2-1:2002, modified + A1:2008, modified); German version EN 60669-2-1:2004 + A1:2009
家用和类似用途固定电气装置用开关第2-1部分:特殊要求.电子开关(IEC 60669-2-1-2002 修改+A1-2008 修改);德文版EN 60669-2-1:2004+A1:2009