Use this link for procurement, engineering design, or safety compliance. Avoid pirated PDFs—IEC actively tracks copyright infringement, and using outdated versions can lead to fatal design errors (e.g., incorrect arc flash distances).
Specific updates to minimum height clearances and safety distances within closed electrical operating areas, including better definitions for snow effects.
The safety and reliability of high-voltage power systems are paramount for modern society. IEC 61936-1:2021 provides the "common rules" for the design and erection of electrical power installations, serving as the primary reference for engineers, utilities, and regulators. iec 6193612021 link
The 2021 revision brought several notable changes to align with contemporary technology and safety standards, as highlighted in technical summaries from iTeh Standards .
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. Use this link for procurement, engineering design, or
IEC 61936-1:2021 has been adopted as a (EN IEC 61936-1:2021) and is therefore mandatory in all CENELEC member countries. Many national standards bodies have published identical national versions:
For European users, the CENELEC amendment A11:2025 is particularly important because it aligns the standard with EU directives and adds binding national provisions. Whether you are a power system engineer, a safety manager, or a regulatory officer, IEC 61936‑1:2021 (and its European equivalent) provides the essential rules for ensuring that HV installations are safe, reliable, and compliant. The safety and reliability of high-voltage power systems
The electrical industry is constantly evolving, with new technologies demanding higher safety standards for power distribution and generation. ("Power installations exceeding 1 kV AC and 1.5 kV DC – Part 1: AC") stands as the international benchmark for designing and erecting high-voltage (HV) electrical systems. As the 3rd edition, published in August 2021, this standard supersedes the aging 2010 version, bringing in updated safety clearances, earthing requirements, and modern engineering practices.