BS EN 61643-21:2001+A1:2009被替代
Low voltage surge protective devices. Surge protective devices connected to telecommunications and signalling networks. Performance requirements and testing methods
出版：British Standards Institution
專家解讀視頻
? British Standards Institution 2013
Amendment notes:
Amendment, January 2010. Amends and replaces BS EN 61643-21:2001
SS EN 61643-21 Ed. 1 (2002) - Identical
I.S. EN 61643-21:2001 - Identical
IEC 61643-21 Ed. 1.0 - Identical
NF EN 61643-21:2001 - Identical
UNE EN 61643-21:2002 - Identical
NBN EN 61643-21:2002 - Identical
DIN EN 61643-21 (2002-03) - Identical
SN EN 61643-21:2001 - Identical
DIN EN 61643-21 (2010-03) - Identical
