UNE EN 61643-21:2002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：Asociacion Espanola de Normalizacion
专家解读视频
2002 A2 2013 [22/05/2013]2002 A1 2009 [18/11/2009]2002 [28/10/2002]
DIN EN 61643-21:2013 - Identical
DIN EN 61643-21 (2013-07) - Identical
SS EN 61643-21:2002 - Identical
BS EN 61643-21:2001+A2:2013 - Identical
DIN EN 61643-21 (2010-03) - Identical
SN EN 61643-21:2001 - Identical
BS EN 61643-21:2001+A1:2009 - Identical
DIN EN 61643-21 (2002-03) - Identical
NBN EN 61643-21:2002 - Identical
NF EN 61643-21:2001 - Identical
IEC 61643-21 Ed. 1.0 - Identical
I.S. EN 61643-21:2001 - Identical
SS EN 61643-21 Ed. 1 (2002) - Identical
