IEC 61936-1:2021 (Edition 3.0) establishes international safety and design requirements for AC power installations exceeding 1 kV, introducing over 20 technical changes including clarified scope, enhanced EMC requirements, and updated insulation coordination. This standard covers essential earthing, clearance, and structural safety guidelines for high-voltage installations. Purchase the official standard at the IEC Webstore iTeh Standards
IEC 61936-1:2021 provides updated international standards for designing and erecting AC high-voltage power installations exceeding 1 kV, emphasizing safety for personnel and property. This version includes major technical enhancements regarding gas-insulated switchgear, HVAC requirements, and improved accessibility standards, often implemented as EN IEC 61936-1:2021 in Europe. The full standard is available for purchase on the IEC Webstore . IEC 61936-1:2021
IEC 61936-1:2021 standard is the definitive global reference for the design and installation of electrical power systems exceeding . This third edition introduced roughly 20 major changes to modernize safety and technical requirements for high-voltage (HV) infrastructure. Core Scope & Applications This standard governs the "erection" phase—ensuring that power installations are safely built and fully functional for their intended use. It applies to: Substations and power stations. Outdoor switchgear and industrial electrical systems. Offshore generation and transition poles. Top 5 Critical Updates in the 2021 Edition Safety & Maintenance Distinction : The standard now explicitly distinguishes between the of an installation and subsequent maintenance/repair activities. Annex F provides crucial informative guidelines for safe working procedures where local regulations are missing. Insulation Coordination (Clause 5) : This section has been completely updated to align with the latest versions of international insulation standards, providing clearer wording for phase-to-phase and phase-to-earth clearances. Earthing & Touch Voltages : The permissible touch-voltage curves in have been modified. For CENELEC members, there is now an explicit alignment with for earthing systems. Reintroduction of GIS Requirements : Missing requirements for Gas-Insulated Switchgear (GIS) from previous versions were reintroduced and refined. Protection & Automation (Clause 11) : This clause was restructured and improved, particularly regarding lightning protection and requirements for labeling when multiple power sources must be disconnected. Design & Safety Quick-Reference IEC 61936-1:2010
The IEC 61936-1:2021 standard, titled "Power installations exceeding 1 kV AC and 1.5 kV DC – Part 1: AC" , is a technical revision that establishes safety and design requirements for high-voltage AC electrical power installations. Official Links and Purchase You can access the standard and its variants via these official and authorized platforms: IEC Webstore : The primary source for the official standard. IEC Webstore (Commented Version) : A version that includes expert comments explaining major changes between the 2010 and 2021 editions. BSI Knowledge : Provides the British adoption (BS EN IEC 61936-1:2021). ANSI Webstore : Another commercial source for the British Standard version. Key Updates in the 2021 Edition The 2021 edition replaces the previous 2010 version with approximately 20 major changes, including: Restructured Clauses : The section on protection, automation, and auxiliary systems was completely restructured for better clarity. GIS Requirements : Reintroduced specific requirements for Gas-Insulated Switchgear (GIS). Improved Safety Guidance : Added new labelling requirements for multiple power sources and an informative guideline (Annex F) for safe working procedures when national regulations are unavailable. HVAC Improvements : Enhanced requirements for ventilation systems (HVAC) in electrical installations. Lightning Protection : Extended the protection requirements against lightning strokes. Editorial Clarity : Updated terms, definitions, and changed "should" to "shall" in many instances to make requirements mandatory rather than advisory. Scope and Applications The standard applies to systems with nominal voltages exceeding 1 kV AC and frequencies up to 60 Hz. Includes : Substations, electrical installations on poles/masts, industrial plants, and offshore facilities. Excludes : Overhead lines between separate installations, electrified railways, mining equipment, and medical equipment. IEC 61936-1:2021 CMV iec 6193612021 link
It seems you are looking for information on IEC 61936-1:2021 (the correct designation), likely with a typo in the search term ("6193612021" instead of "61936-1 2021"). IEC 61936-1:2021 is a critical international standard titled: "Power installations exceeding 1 kV a.c. – Part 1: Common rules" Here is a helpful guide to understanding and using this standard.
1. What is the Scope of IEC 61936-1:2021?
Applies to power installations with nominal voltages above 1 kV AC (typically up to 800 kV). Covers design, erection, and operation requirements for substations, switchyards, and power plants (excluding utility distribution lines and equipment inside buildings under other standards like IEC 61936-2 for DC). Focuses on safety of persons, property, and operational reliability. IEC 61936-1:2021 (Edition 3
2. Key Changes in the 2021 Edition vs. Older Versions If you previously used the 2010 or 2015 versions, note:
Clearance requirements updated based on new transient overvoltage data. Earthing (grounding) design more aligned with IEC 50522 and IEEE 80 methodologies. Fire protection provisions strengthened for transformer and cable installations. Safety signage and access control now reference modern risk assessment. Maintenance section expanded to include condition monitoring.
3. How to Use the Standard – A Practical Guide | Step | Task | Relevant Clause | |----------|----------|----------------------| | 1 | Determine system voltage, fault current, and earthing type | Clause 5 | | 2 | Calculate safety clearances (air insulation) | Clause 6 | | 3 | Design earthing system (touch/step voltage limits) | Clause 7 + Annex B | | 4 | Select equipment ratings (switchgear, transformers) | Clause 8 | | 5 | Plan fire compartments and oil containment | Clause 9 | | 6 | Define access restrictions and warning signs | Clause 10 | | 7 | Document operational and maintenance instructions | Clause 11 | 4. Common Cross-References You’ll Need IEC 61936-1:2021 often calls up: This third edition introduced roughly 20 major changes
IEC 61936-2 – DC installations > 1.5 kV IEC 60529 – IP ratings IEC 62271 series – High-voltage switchgear IEC 60076 series – Power transformers IEC 60364 series – Low-voltage (for auxiliary supplies)
5. Where to Obtain & Implement