Available via national standards bodies such as BSI or SFS . Summary of 2026 Regulatory Status
Preventing equipment failure and fire propagation.
The first edition of IEC 61936‑1 was published in . A second edition followed in 2010 , with an amendment in 2014 . The third edition (2021) therefore represents more than a decade of accumulated experience and technical progress.
In January 2026, a was published and became effective on 1 February 2026 for most CENELEC member countries, with a latest date of withdrawal (dow) for conflicting national standards set for 3 February 2026 . iec 6193612021 link
: Electrical design engineers, utility operators, safety inspectors, and high-voltage equipment manufacturers. Key Technical Requirements and Safe Design
Official copies and detailed summaries are available through several international and national standards bodies: IEC Webstore The primary source for the international standard. BSI Knowledge Provides the BS EN IEC 61936-1:2021 version used in the UK. iTeh Standards
The 2021 revision brought several notable changes to align with contemporary technology and safety standards, as highlighted in technical summaries from iTeh Standards . Available via national standards bodies such as BSI or SFS
The IEC 61936-1:2021 standard has significant implications for the electrical industry, as it provides a comprehensive framework for designing, constructing, and operating power installations. Some of the key benefits of IEC 61936-1:2021 include:
The standard does apply to the design and erection of:
The 2021 revision introduced several significant technical shifts compared to the 2014 version: A second edition followed in 2010 , with
Ensuring installations operate safely under normal and fault conditions.
The interesting story of IEC 61936-1:2021 isn't in the reading (it is dry, technical, and dense). The story is in the .
This document is structured to analyze the standard, its scope, and its critical implications for electrical safety and infrastructure design.
The importance of IEC 61936-1:2021 cannot be overstated. High-voltage power installations can be hazardous if not designed, constructed, and maintained properly. The standard helps to ensure that such installations are safe for workers, the general public, and the environment. By following the guidelines set out in IEC 61936-1:2021, companies and organizations can minimize the risks associated with high-voltage power installations and ensure compliance with regulatory requirements.
| | What Changed in the 3rd Edition | | --------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Introduction & Scope | The introduction has been rewritten to reflect the current status. The scope has been improved to clarify the application of the document. | | Terms & Definitions | Missing and obsolete terms and definitions have been updated, and existing terms have been improved. | | Supplier‑User Agreements (Table 1) | Table 1 has been updated to show where agreements between supplier and user are needed. | | Electromagnetic Compatibility (EMC) | Requirements of electromagnetic compatibility have been clarified. | | Insulation Coordination (Clause 5) | Wording has been improved for better clarity, and the technical content has been aligned with the latest versions of the insulation coordination standards. | | Electrical Equipment | Wording regarding electrical equipment has been improved and made clearer. | | Fuses | The subclause for fuses has been improved and reworded. | | Labelling for Multiple Sources | Requirements have been added for labelling when multiple sources are required to be disconnected. | | Gas‑Insulated Switchgear (GIS) | Missing requirements for GIS have been reintroduced. | | Ventilation (HVAC) | The subclause regarding ventilation has been improved. | | Figures in Clause 7 | Figures in Clause 7 have been updated and moved to the corresponding subclause. | | Transformer Installations | Requirements for transformer installations have been improved, including correction of editorial typing‑errors. | | Protection, Automation & Auxiliary | The clause on protection, automation and auxiliary systems has been restructured and improved. | | Protection Against Lightning Strokes | Protection requirements have been extended. | | Erection vs. Maintenance | The distinction between erection (and providing electrical safety for the intended use) and subsequent activities such as maintenance and repair has been clarified. | | Safe Working Procedures (Annex F) | Where no provincial, national or regional regulations are available for safe working procedures, an informative guideline is now provided in Annex F. |