: Reintroduced specific requirements for Gas-Insulated Switchgear (GIS).
For companies and organizations involved in high-voltage power installations, we recommend:
Available via national standards bodies such as BSI or SFS . Summary of 2026 Regulatory Status
Understanding what the standard covers is as important as knowing its limitations. IEC 61936-1:2021 serves as the guiding link for a vast array of electrical assets commonly found in industrial plants, utility substations, and commercial buildings. iec 6193612021 link
To obtain the official, legally compliant PDF or hardcopy version of the standard, you must access it through authorized distributors. Where to Purchase and Download:
The standard enforces strict structural design principles to eliminate flashover risks and accidental physical contact. It specifies minimum air clearances based on the system's rated impulse withstand voltage. For indoor sub-stations, the baseline clearance demands at least the danger zone dimension plus 200 mm (minimum 500 mm), whereas outdoor setups mandate a threshold of the danger zone plus 300 mm (minimum 600 mm). 2. Earthing Systems and Touch-Voltage Limits
The third edition brings significant changes compared to the 2010 version to address modern infrastructure needs: IEC 61936-1:2021 serves as the guiding link for
| | Detail | | ---------------------------------- | ------------------------------------------------------------------------- | | Full designation | IEC 61936‑1:2021 | | Title | Power installations exceeding 1 kV AC and 1,5 kV DC – Part 1: AC | | Edition | 3.0 (2021) | | Pages | 245 | | Price | CHF 430 (approximately USD 480) | | Technical Committee | TC 99 (Insulation co‑ordination and system engineering of HV installations) | | Stability date | 2028 | | European version | EN IEC 61936‑1:2021 + A11:2025 | | Key amendments | A11:2025 (CENELEC) effective February 2026 | | Supersedes | IEC 61936‑1:2010 (including Amendment 1:2014) |
: Missing provisions regarding high-voltage GIS systems have been reintroduced.
Applies to AC systems above 1,000V and frequencies up to 60 Hz. Key Environments: It specifies minimum air clearances based on the
The most likely explanation is a typographical or formatting error in the keyword. The numeric string "61936" points directly to a well-known standard, while "12021" does not correspond to any valid year (2021) or part number for that series.
IEC 61936-1:2021 often calls up:
Saline coastal air or industrial chemical emissions require specific IP (Ingress Protection) ratings and specialized insulator coatings. 3. Fire and Explosion Protection