I.S. EN 61643-21:2001現行
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 (eqv) + Corrigendum Mar. 2001 (eqv))
出版：National Standards Authority of Ireland
專家解讀視頻
Pertains to devices for surge protection of telecommunications and signalling networks against indirect and direct effects of lightning or other transient overvoltages.
UNE EN 61643-21:2002 - Identical
SS EN 61643-21 Ed. 1 (2002) - Identical
IEC 61643-21 Ed. 1.0 - Identical
NF EN 61643-21:2001 - Identical
NBN EN 61643-21:2002 - Identical
DIN EN 61643-21 (2002-03) - Identical
BS EN 61643-21:2001+A1:2009 - Identical
SN EN 61643-21:2001 - Identical
BS EN 61643-21:2001+A2:2013 - Identical
DIN EN 61643-21:2013 - Identical
SS EN 61643-21:2002 - Identical
IEC 61643-21 : 1.2 - Identical
SN EN 61643-21 : 2001 - Identical
EN 61643-21 : 2001 AMD 2 2013 - Identical
UNE EN 61643-21 : 2002 - Identical
NBN EN 61643-21 : 2002 AMD 2 2013 - Identical
NF EN 61643-21 : 2001 AMD 2 2013 - Identical
BS EN 61643-21 : 2001 - Identical
DIN EN 61643-21 : 2013 - Identical
BS EN 61643-21 : 2001 - Identical
IEC 61643-21 : 1.2 - Identical
