Iec 6193612021 Link ((link))

The 2021 revision aligns better with digital substations. It addresses the installation of non-conventional instrument transformers (NCITs) and electronic current/voltage sensors, which require different physical mounting and shielding considerations compared to traditional oil-paper insulated transformers.

To stay compliant, engineering teams should follow these steps: iec 6193612021 link

IEC 61936-1:2021 sets uniform safety and reliability requirements for AC systems over 1 kV and up to 60 Hz. It covers installations in substations, power stations, industrial sites, and offshore facilities, while excluding overhead/underground lines, mining, and specific switchgears. The 2021 update brings crucial revisions: IEC 61936-1:2021 The 2021 revision aligns better with digital substations

As renewable energy plants (Solar PV, Wind) typically connect at medium to high voltages, IEC 61936-1:2021 serves as the governing standard for the on-site substations. The shift towards higher voltage DC collection systems (HVDC) is acknowledged, though the primary focus remains on AC installations. Engineers designing grid-interconnection points must strictly adhere to these guidelines to satisfy grid operators. It covers installations in substations

The amendment (published in 2021) is likely what you saw. Some systems concatenate numbers, turning "Part 1 – Amendment 1 - 2021" into a garbled "6193612021".