
Low Voltage Surge Protective Devices - Part 21: Surge Protective Devices Connected To Telecommunications And Signalling Networks - Performance Requirements And Testing Methods
出版:Nederlands Normalisatie Instituut

專家解讀視頻
基本信息
標準編號: NEN EN IEC 61643-21:2001
發布時間:2001/9/1 0:00:00
標準類別:Standard
出版單位:Nederlands Normalisatie Instituut
標準頁數:132
標準簡介
Applies to devices for surge protection of telecommunications and signalling networks against indirect and direct effects of lightning or other transient overvoltages.
標準備注
Supersedes NEN IEC 61643-21. (08/2002)
本標準替代的舊標準
等同采用的國際標準
IEC 61643-21 Ed. 1.0 - Identical