PN EN 61643-21:2004现行
Low Voltage Surge Protective Devices - Part 21: Surge Protective Devices Connected To Telecommunications And Signalling Networks - Performance Requirements And Testing Methods
出版：Polish Committee for Standardization
专家解读视频
基本信息
标准编号： PN EN 61643-21:2004
发布时间：2004/7/1 0:00:00
标准类别：Standard
出版单位：Polish Committee for Standardization
标准页数：77
标准简介
2004 AMD 2 2013 [12/06/2013]2004 AMD 1 2009 [27/05/2009]2004 [01/07/2004]2002 [15/09/2002]
标准备注
AMD 1 2009 is only available in English. (06/2009) AMD 2 2013 is only available in English. (07/2013)
等同采用的国际标准
IEC 61643-21 Ed. 1.0 - Identical
