IEC 61400-1:2019/AMD1:2025/COR1:2026
(Amendment)Corrigendum 1 - Amendment 1 - Wind energy generation systems - Part 1: Design requirements
- Status
- Published
- Publication Date
- 28-Oct-2026
- Technical Committee
- TC 88 - Wind energy generation systems
- Current Stage
- PPUB - Publication issued
- Start Date
- 29-Oct-2026
- Completion Date
- 10-Dec-2026
Relations
- Effective Date
- 04-Sep-2026
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Frequently Asked Questions
IEC 61400-1:2019/AMD1:2025/COR1:2026 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Corrigendum 1 - Amendment 1 - Wind energy generation systems - Part 1: Design requirements". This standard covers: Corrigendum 1 - Amendment 1 - Wind energy generation systems - Part 1: Design requirements
Corrigendum 1 - Amendment 1 - Wind energy generation systems - Part 1: Design requirements
IEC 61400-1:2019/AMD1:2025/COR1:2026 is classified under the following ICS (International Classification for Standards) categories: 27.180 - Wind turbine energy systems. The ICS classification helps identify the subject area and facilitates finding related standards.
IEC 61400-1:2019/AMD1:2025/COR1:2026 has the following relationships with other standards: It is inter standard links to IEC 61400-1:2019/AMD1:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
IEC 61400-1:2019/AMD1:2025/COR1:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
IEC 61400-1:2019 IEC 61400-1:2019
Amendment 1 to Edition 4.0 2025-12 Amendement 1 à l'édition 4.0 2025-12
Wind energy generation systems - Systèmes de génération d'énergie éolienne -
Part 1: Design requirements Partie 1: Exigences de conception
CO RRI G E NDUM 1
Corrections to the French version appear after the English text.
Les corrections à la version française sont données après le texte anglais.
11.9.2 Assessment of the fatigue load suitability by reference to wind data
Add, after last paragraph, the following new text:
Replace, in item e), Equation (37) with the following:
2 2 22
ρ VVcos ϕρ≥ × cos ϕ (37)
design ave,design design site ave,site site
11.9.3 Assessment of the ultimate load suitability by reference to wind data
Add, after last paragraph, the following new text:
Replace item b) with the following new text:
b) The site estimate of the extreme 10-min average wind speed V at hub height with a return
period of 50 years shall be less than or equal to V adjusted to the site-specific air density
ref
and site flow inclination. If the only input basis for the site assessment is an extreme 3 s
average wind speed V at hub height, the 10-minute average V may be determined using
e50 50
the following equation:
V
e50
V =
50 (39)
k
T
where k = 1,28, derived from k = 1 + g I (according to ISO 4354), g = 2,56 and I =
T T v v v v
σ /V = 0,11. See Equation (17).
1 hub
IEC 61400-1:2019-02/AMD1:2025-12/COR1:2026-10(en-fr)
V shall be modified according to Footnote 31 if the coefficient of variation of the annual
maximum wind speed is larger than 15 %. For that purpose, it shall be demonstrated that
the following condition applies:
22 2 2
ρ V cos ϕρ≥ ×V cos ϕ
design ref design site 50,hub site (40)
In case of T classification where V is not defined in accordance with Eq
...