Components for low-voltage surge protective devices - Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT)
低压浪涌保护器件元件第351部分:电信和信号网络浪涌隔离变压器（SIT）的性能要求和测试方法
2016-10-28
DIN EN 61643-351
Components for low-voltage surge protective devices - Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT) (IEC 61643-351:2016); German version EN 61643-351:2017
低压浪涌保护器元件.第351部分:电信和信号网络浪涌隔离变压器（SIT）的性能要求和试验方法（IEC 61643-351-2016）；德文版EN 61643-351:2017
2020-04-01
DIN EN 61643-21/A2-DRAFT
Draft Document - Low voltage surge protective - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods (IEC 37A/234/CDV:2011); German version EN 61643-21:2001/FprA2:2011
文件草案-低压浪涌保护器-第21部分:连接到电信和信号网络的浪涌保护装置-性能要求和试验方法（IEC 37A/234/CDV:2011）；德文版EN 61643-21:2001/FprA2:2011