NF EN 61643-21:2001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：Association Francaise de Normalisation
专家解读视频
2001 AMD 2 2013 [01/07/2013]2001 AMD 1 2009 [01/06/2009]2001 [01/11/2001]
Indice de classement: C61-744-21. (02/2002)
UNE EN 61643-21:2002 - Identical
SS EN 61643-21 Ed. 1 (2002) - Identical
SN EN 61643-21:2001 - Identical
DIN EN 61643-21 (2010-03) - Identical
SS EN 61643-21:2002 - Identical
DIN EN 61643-21 (2013-07) - Identical
BS EN 61643-21:2001+A2:2013 - Identical
BS EN 61643-21:2001+A1:2009 - Identical
DIN EN 61643-21 (2002-03) - Identical
NBN EN 61643-21:2002 - Identical
IEC 61643-21 Ed. 1.0 - Identical
I.S. EN 61643-21:2001 - Identical
DIN EN 61643-21:2013 - Identical
