Components for low-voltage surge protection - Part 352: Selection and application principles for telecommunications and signalling network surge isolation transformers (SITs) (IEC 61643-352:2018); German version EN IEC 61643-352:2018
低压浪涌保护元件.第352部分:电信和信号网络浪涌隔离变压器(SIT)的选择和应用原则(IEC 61643-352-2018);德国版本EN IEC 61643-352:2018