EN 61400-13:2016/A1:2022

Wind turbines - Part 13: Measurement of mechanical loads

Windenergieanlagen - Teil 13: Messung von mechanischen Lasten

Éoliennes - Partie 13: Mesurage des charges mécaniques

Vetrne turbine - 13. del: Meritve mehanskih obremenitev - Dopolnilo A1 (IEC 61400-13:2015/AMD1:2021)

General Information

• Status: Published
• Publication Date: 20-Jan-2022
• ICS: 27.180 - Wind turbine energy systems
• Technical Committee: CLC/TC 88 - Wind turbines
• Drafting Committee: IEC/TC 88 - IEC_TC_88
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 21-Jan-2022
• Due Date: 30-Jun-2021
• Completion Date: 21-Jan-2022
• Ref Project: SIST EN 61400-13:2016/A1:2022 - Wind turbines - Part 13: Measurement of mechanical loads (IEC 61400-13:2015/AMD1:2021)

Relations

• Amends: EN 61400-13:2016 - Wind turbines - Part 13: Measurement of mechanical loads
• Effective Date: 29-Dec-2020

Overview

EN 61400-13:2016/A1:2022 is the CENELEC/CLC amendment to the European adoption of IEC 61400-13 (Part 13: Measurement of mechanical loads). Published January 2022, this amendment (A1) corrects and updates the original EN 61400-13:2016 text - in particular the informative Annex B - to clarify procedures and mathematical expressions used to evaluate uncertainties in wind turbine mechanical load measurements. The amendment was approved by CENELEC and is intended for use across national electrotechnical committees in Europe.

Key topics and technical requirements

• Measurement of mechanical loads on wind turbines: procedures and requirements for gathering reliable load data used in structural verification, certification and design validation.
• Uncertainty evaluation procedures: corrections in Annex B specify how to calculate total uncertainty, calibration uncertainty and combined uncertainties for binned/averaged values (replacing multiple equations and tables).
• Binned average statistics: revised formulas for bin scatter, uncertainty of x‑axis quantities, and uncertainty of bin‑averaged mean values to ensure consistent treatment of statistical measurement results.
• Calibration details: updates to the analytical shunt calibration example (tables and equations) covering amplifier gain/offset, shunt resistances, gauge resistances and signal quantization - improving transparency of calibration‑related uncertainty sources.
• Replacement of equations and tables: numerous specific equations (e.g., B.7–B.45) and tables (B.1, B.2) in Annex B are updated to correct prior errors affecting uncertainty computations.
• Informative guidance: Annex B remains informative and provides worked examples to support practical application of the uncertainty methodology.

Applications and who uses it

This standard and its A1 amendment are directly useful for:

• Wind turbine manufacturers performing load measurement campaigns during prototype testing or type certification.
• Test laboratories and measurement engineers responsible for instrumentation, calibration and data analysis.
• Certification and conformity assessment bodies that rely on standardized uncertainty evaluation for compliance decisions.
• Structural and fatigue analysts, research institutes and consultants using measured loads for lifetime assessment, model validation and design optimization.
• Asset owners/operators seeking trustworthy load monitoring data to inform operation and maintenance decisions.

Related standards and context

• EN 61400 series (wind turbine standards) - Part 13 specifically complements other parts addressing design, safety, and testing.
• IEC 61400-13:2015 and its amendment IEC 61400-13/AMD1:2021 (the international source of this amendment).

Keywords: EN 61400-13, IEC 61400-13, measurement of mechanical loads, wind turbine load measurement, uncertainty evaluation, shunt calibration, CENELEC, wind turbine standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2022
Vetrne turbine - 13. del: Meritve mehanskih obremenitev - Dopolnilo A1 (IEC 61400-
13:2015/AMD1:2021)
Wind turbines - Part 13: Measurement of mechanical loads (IEC 61400-
13:2015/AMD1:2021)
Windenergieanlagen - Teil 13: Messung von mechanischen Lasten (IEC 61400-
13:2015/AMD1:2021)
Éoliennes - Partie 13: Mesurage des charges mécaniques (IEC 61400-
13:2015/AMD1:2021)
Ta slovenski standard je istoveten z: EN 61400-13:2016/A1:2022
ICS:
27.180 Vetrne elektrarne Wind turbine energy systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61400-13:2016/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM January 2022
ICS 27.180
English Version
Wind turbines - Part 13: Measurement of mechanical loads
(IEC 61400-13:2015/AMD1:2021)
Éoliennes - Partie 13: Mesurage des charges mécaniques Windenergieanlagen - Teil 13: Messung von mechanischen
(IEC 61400-13:2015/AMD1:2021) Lasten
(IEC 61400-13:2015/AMD1:2021)
This amendment A1 modifies the European Standard EN 61400-13:2016; it was approved by CENELEC on 2022-01-07. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61400-13:2016/A1:2022 E

European foreword
The text of document 88/795/CDV, future IEC 61400-13/AMD1, prepared by IEC/TC 88 "Wind energy
generation systems" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-10-07
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-01-07
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61400-13:2015/AMD1:2021 was approved by CENELEC as
a European Standard without any modification.

IEC 61400-13 ®
Edition 1.0 2021-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Wind turbines –
Part 13: Measurement of mechanical loads

Éoliennes –
Partie 13: Mesurage des charges mécaniques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.180 ISBN 978-2-8322-1054-3

– 2 – IEC 61400-13:2015/AMD1:2021
© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
WIND TURBINES –
Part 13: Measurement of mechanical loads

AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
This amendment has been prepared by IEC technical committee 88: Wind energy generation
systems.
The text of this amendment is based on the following documents:
Draft Report on voting
88/795/CDV 88/821/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

IEC 61400-13:2015/AMD1:2021 – 3 –
© IEC 2021
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications/.
The committee has decided that the contents of th
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