
Low Voltage Surge Protective Devices - Part 21: Surge Protective Devices Connected To Telecommunications And Signalling Networks - Performance Requirements And Testing Methods (Iec 61643-21:2000 + Corrigendum 2001 + A1:2008 + A2:2012)
出版:Verband Deutscher Elektrotechniker

专家解读视频
2013 [01/07/2013]2010 [01/03/2010]2002 [01/03/2002]
Supersedes DIN EN 61644-21. (03/2002)
BS EN 61643-21:2001+A2:2013 - Identical
SS EN 61643-21:2002 - Identical
UNE EN 61643-21:2002 - Identical
I.S. EN 61643-21:2001 - Identical
NF EN 61643-21:2001 - Identical
NBN EN 61643-21:2002 - Identical
SN EN 61643-21:2001 - Identical