Components for low-voltage surge protective devices - Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT)— 54 стр.
Components for low-voltage surge protection. Selection and application principles for telecommunications and signalling network surge isolation transformers (SITs)— 26 стр.
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) (english version)
