The 2021 revision introduced several significant technical shifts compared to the 2014 version:
The 2021 revision introduced several improvements to modernize safety protocols and clarify technical requirements: Insulation Coordination: iec 6193612021 link
If you typed into a search engine, you are likely looking for the official documentation or download link for the IEC 61936 series , specifically concerning the 2021 edition of one of its parts. iec 6193612021 link
IEC 61936-1:2021 often calls up: