IEC 61400-22:2010

Wind turbines - Part 22: Conformity testing and certification

IEC 61400-22:2010 was withdrawn on 2018-08-31, and replaced with the deliverables for the wind sector (WE-OMC) contained in the IECRE Conformity Assessment System. More information available here.
IEC 61400-22:2010 defines rules and procedures for a certification system for wind turbines (WT) that comprises both type certification and certification of wind turbine projects installed on land or off-shore. This system specifies rules for procedures and management for carrying out conformity evaluation of WT and wind farms, with respect to specific standards and other technical requirements, relating to safety, reliability, performance, testing and interaction with electrical power networks.

Eoliennes - Partie 22: Essais de conformité et certification

La CEI 61400-22:2010 définit les règles et procédures d'un système de certification des éoliennes comprenant la certification de type et la certification des projets d'éoliennes installées sur terre ou en mer. Ce système spécifie les règles relatives aux procédures et à la gestion de mise en oeuvre de l'évaluation de la conformité d'une éolienne et des parcs éoliens, avec les normes spécifiques et autres exigences techniques en matière de sécurité, de fiabilité, de performances, d'essais et d'interaction avec les réseaux électriques.

General Information

• Status: Withdrawn
• Publication Date: 30-May-2010
• Withdrawal Date: 30-Aug-2018
• ICS: 27.180 - Wind turbine energy systems
• Technical Committee: TC 88 - Wind energy generation systems
• Current Stage: WPUB - Publication withdrawn
• Start Date: 31-Aug-2018
• Completion Date: 31-Aug-2018

Relations

• Replaces: IEC WT 01:2001 - IEC System for Conformity Testing and Certification of Wind Turbines - Rules and procedures
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61400-22 ®
Edition 1.0 2010-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Wind turbines –
Part 22: Conformity testing and certification

Eoliennes –
Partie 22: Essais de conformité et certification

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by

any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or

IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.

Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette

publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: [e-mail]
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: [e-mail]
Tel.: [phone]
Fax: [phone]
A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
ƒ Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
ƒ Just Published CEI: www.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
ƒ Electropedia: www.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
ƒ Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: [e-mail]
Tél.: [phone]
Fax: [phone]
IEC 61400-22 ®
Edition 1.0 2010-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Wind turbines –
Part 22: Conformity testing and certification

Eoliennes –
Partie 22: Essais de conformité et certification

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XC
CODE PRIX
ICS 27.180 ISBN 978-2-88910-943-2
– 2 – 61400-22 © IEC:2010
CONTENTS
FOREWORD.6

INTRODUCTION.8

1 Scope.9

2 Normative references .9

3 Terms and definitions .11

4 Symbols and abbreviations.13

4.1 Symbols .13

4.2 Abbreviations .13
5 Acceptance of operating bodies.13
5.1 General .13
5.2 Accreditation .13
5.3 Recognition arrangements.14
5.4 Advisory committee .14
6 Management of the certification system.14
6.1 General .14
6.2 Agreement on certification.15
6.3 Issue of certificates and conformity statements .15
6.4 Security of relevant documentation.15
6.5 Validity, maintenance and expiration of certificates .15
6.5.1 General .15
6.5.2 Maintenance of type certificate .16
6.5.3 Maintenance of project certificate .16
6.5.4 Dealing with outstanding matters .17
6.6 Corrective actions .17
7 The extent of certification .17
7.1 General .17
7.2 Type certification.18
7.3 Project certification.20
7.4 Component certification.21
7.5 Prototype certification.23
8 Type certification .23
8.1 General .23

8.2 Design basis evaluation.24
8.3 Design evaluation.24
8.3.1 General .24
8.3.2 Design control .25
8.3.3 Control and protection system .25
8.3.4 Loads and load cases.26
8.3.5 Rotor blades.26
8.3.6 Machine and structural components.27
8.3.7 Electrical components .27
8.3.8 Housings .28
8.3.9 Evaluation of component tests .29
8.3.10 Foundation design requirements.29
8.3.11 Manufacturing process .30
8.3.12 Transportation process .30

61400-22 © IEC:2010 – 3 –
8.3.13 Installation process.30

8.3.14 Maintenance process.31

8.3.15 Personnel safety.31

8.3.16 Design evaluation conformity statement.31

8.4 Type testing .32

8.4.1 General .32

8.4.2 Safety and function tests .33

8.4.3 Power performance measurements.33

8.4.4 Load measurements .33

8.4.5 Blade tests .34

8.4.6 Other tests .34
8.4.7 Test reports .34
8.4.8 Type test conformity statement.35
8.5 Manufacturing evaluation .35
8.5.1 General .35
8.5.2 Quality system evaluation.35
8.5.3 Manufacturing inspection.35
8.5.4 Manufacturing conformity statement .36
8.6 Foundation design evaluation.37
8.7 Foundation manufacturing evaluation .37
8.7.1 General .37
8.7.2 Quality system evaluation.37
8.7.3 Foundation manufacturing inspection .38
8.7.4 Foundation manufacturing conformity statement.38
8.8 Type characteristics measurements.39
8.8.1 General .39
8.8.2 Power quality measurements.40
8.8.3 Low voltage ride through measurement .40
8.8.4 Acoustic noise measurements .40
8.8.5 Test reports .40
8.8.6 Type characteristics measurements conformity statement .41
8.9 Final evaluation.41
8.10 Type certificate.41
9 Project certification.42
9.1 General .42

9.2 Site conditions evaluation.42
9.2.1 General .42
9.2.2 Site conditions evaluation requirements.42
9.2.3 Site conditions evaluation conformity statement.43
9.3 Design basis evaluation.43
9.3.1 General .43
9.3.2 Design basis requirements .43
9.3.3 Design basis conformity statement .44
9.4 Integrated load analysis .44
9.4.1 General .44
9.4.2 Integrated load analysis requirements .45
9.4.3 Integrated load analysis conformity statement .45
9.5 Site-specific wind turbine/RNA design evaluation .45

– 4 – 61400-22 © IEC:2010
9.5.1 General .45

9.5.2 Site-specific wind turbine design requirements .45

9.5.3 Site-specific wind turbine design conformity statement .46

9.6 Site-specific support structure design evaluation .46

9.6.1 General .46

9.6.2 Site-specific support structure design evaluation requirements .47

9.6.3 Support structure design conformity statement .47

9.7 Other installations design evaluation .47

9.7.1 General .47

9.7.2 Other installations design evaluation requirements .47

9.7.3 Other installations design conformity statement.48
9.8 Wind turbine/RNA manufacturing surveillance .48
9.8.1 General .48
9.8.2 Surveillance requirements .48
9.8.3 Wind turbine/RNA manufacturing surveillance conformity statement .49
9.9 Support structure manufacturing surveillance .49
9.9.1 General .49
9.9.2 Surveillance requirements .49
9.9.3 Support structure manufacturing surveillance conformity statement .50
9.10 Other installations manufacturing surveillance.50
9.10.1 General .50
9.10.2 Surveillance requirements .50
9.10.3 Other installations manufacturing surveillance conformity statement.51
9.11 Project characteristics measurements .51
9.11.1 General .51
9.11.2 Grid connection compatibility according to grid codes.52
9.11.3 Verification of power performance .52
9.11.4 Verification of acoustic noise emission .52
9.11.5 Test reports .52
9.11.6 Project characteristics measurement conformity statement.53
9.12 Transportation and installation surveillance .53
9.12.1 General .53
9.12.2 Transportation and installation requirements .53
9.12.3 Transportation and installation conformity statement .53
9.13 Commissioning surveillance .54

9.13.1 General .54
9.13.2 Commissioning surveillance requirements .54
9.13.3 Commissioning surveillance conformity statement .54
9.14 Final evaluation.54
9.15 Project certificate .55
9.16 Operation and maintenance surveillance .55
9.16.1 General .55
9.16.2 Operation and maintenance surveillance requirements .55
9.16.3 Operation and maintenance conformity statement .56
Annex A (informative) Design documentation (if applicable).57
Annex B (informative) Certificate example format .63
Annex C (informative) Minimum requirements for load measurements .72
Annex D (informative) Requirements for safety and function tests.73

61400-22 © IEC:2010 – 5 –
Annex E (informative) Condition monitoring systems for wind turbines .76

Bibliography.78

Figure 1 – Modules of type certification.19

Figure 2 – Modules in project certification.21

Figure 3 – Modules in component certification and their applications for type

certification .22

Figure 4 – Elements of design evaluation.25

Figure 5 – Type testing elements .32

Figure 6 – Type characteristics measurements elements .39

Table A.1 – Design documentation (if applicable).57

– 6 – 61400-22 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
WIND TURBINES –
Part 22: Conformity testing and certification

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 IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61400-22 has been prepared by IEC technical committee 88: Wind

turbines.
This standard cancels and replaces IEC WT 01 (2001): IEC System for Conformity Testing
and Certification of Wind Turbines – Rules and Procedures.
The text of this standard is based on the following documents:
FDIS Report on voting
88/365/FDIS 88/368/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

61400-22 © IEC:2010 – 7 –
A list of all parts of the IEC 61400 series, under the general title: Wind turbines, can be found
on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be

• reconfirmed,
• withdrawn,
• replaced by a revised edition, or

• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 8 – 61400-22 © IEC:2010
INTRODUCTION
This International Standard defines rules and procedures for conformity testing and

certification of wind turbines with respect to standards and technical requirements for wind

turbines and wind farms. It is intended to facilitate mutual recognition (reciprocal acceptance)

by participants of test results and certificates issued by other participants for obtaining

certification at national level and operates within the scope of the IEC 61400 series of

standards and technical specifications for wind turbines.

The certification procedures in this standard constitute a complete third party conformity

evaluation of a wind turbine type, a major component type or one or more wind turbines at a

specific location.
In addition to design verification and testing, this standard provides information for the
recognition of or assessment for approval of the supplier's quality system, regular surveillance
through inspection of the supplier's quality system and quality plans, and audit testing of
samples. The standard is amongst others intended to result in significant benefit to the
applicant by reducing the number of steps necessary to obtain certification or approval at
national level.
61400-22 © IEC:2010 – 9 –
WIND TURBINES –
Part 22: Conformity testing and certification

1 Scope
This International Standard defines rules and procedures for a certification system for wind

turbines (WT) that comprises both type certification and certification of wind turbine projects
installed on land or off-shore. This system specifies rules for procedures and management for
carrying out conformity evaluation of WT and wind farms, with respect to specific standards
and other technical requirements, relating to safety, reliability, performance, testing and
interaction with electrical power networks. It provides:
– definitions of the elements in a wind turbine certification process;
– procedures for conformity evaluation in a wind turbine certification system;
– procedures for conformity surveillance;
– rules for the documentation that is to be supplied by an applicant for the conformity
evaluation; and
– requirements for certification and inspection bodies and testing laboratories.
The rules and procedures are not limited to WT of any particular size or type. However,
special rules and procedures apply for small wind turbines (SWT). Some elements of
certification are mandatory, whilst provision is specifically made for others to be optional. For
type certification, the document describes procedures relating to conformity testing, design,
manufacture, and the plans for transportation, erection, installation and maintenance. The
procedures deal with the assessment of loads and safety, testing, characteristics
measurements and surveillance of manufacturing. For project certification, the document
describes procedures relating to the assessment that particular wind turbines and support
structure/foundation designs in a project are appropriate for the application and relating to
transportation, installation, commissioning, operation and maintenance. The procedures deal
with assessment in accordance with all modules in this document, e.g. the site conditions, the
design of site-specific components and surveillance of manufacturing, transportation,
installation and operation.
The purpose of the rules and procedures is to provide a common basis for certification of wind
turbines and wind turbine projects, including a basis for acceptance of operating bodies (i.e.
certification bodies, inspection bodies and testing laboratories) and mutual recognition of
certificates.
The rules and procedures are intended to be used in conjunction with the appropriate IEC/ISO
standards and Guides, see Clause 2.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
NOTE In the case where an earlier or withdrawn edition of the referenced normative document is used together
with this document, these earlier editions must be specified in the Agreement for Certification, see Subclause 6.2,
and in conformity statements and certificates.
IEC 60034 (all parts), Rotating electrical machines

– 10 – 61400-22 © IEC:2010
IEC 60050-415, International Electrotechnical Vocabulary – Part 415: Wind turbine generator

systems
IEC 61400 (all parts), Wind turbines

IEC 61400-1, Wind turbines – Part 1: Design requirements

IEC 61400-2, Wind turbines – Part 2: Design requirements for small wind turbines

IEC 61400-3:2009, Wind turbines – Part 3: Design requirements for offshore wind turbines

IEC 61400-11, Wind turbine generator systems – Part 11: Acoustic noise measurement
techniques
IEC 61400-12-1, Wind turbines – Part 12-1: Power performance measurements of electricity
producing wind turbines
IEC/TS 61400-13, Wind turbine generator systems – Part 13: Measurement of mechanical
loads
IEC 61400-21, Wind turbines – Part 21: Measurement and assessment of power quality
characteristics of grid connected wind turbines
IEC/TS 61400-23, Wind turbine generator systems – Part 23: Full-scale structural testing of
rotor blades
IEC 61400-24, Wind turbines – Part 24: Lightning protection
ISO/IEC 17020, General criteria for the operation of various types of bodies performing
inspection
ISO/IEC 17021, Conformity assessment – Requirements for bodies providing audit and
certification of management systems
ISO/IEC 17025, General requirements for the competence of testing and calibration
laboratories
ISO/IEC Guide 2: Standardization and related activities – General vocabulary
ISO/IEC Guide 65, General requirements for bodies operating product certification systems
ISO 9001:2008, Quality management systems – Requirements
1)
ISO 81400-4:2005, Wind turbines – Part 4: Design and specification of gearboxes
___________
1)
To be replaced by IEC 61400-4.

61400-22 © IEC:2010 – 11 –
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply, together with the

relevant definitions contained in ISO/IEC Guide 2 and IEC 60050-415.

3.1
accreditation
procedure by which an authoritative body gives formal recognition that a body is impartial and

technically competent to carry out specific tasks such as certification, tests, specific types of

tests etc.
NOTE Accreditation is awarded following successful assessment and is followed by appropriate surveillance.
3.2
applicant
entity applying for certification
3.3
certificate holder
entity holding a certificate after the certificate is issued
NOTE This entity may not be the original applicant but nevertheless is responsible for maintenance of the
certificate.
3.4
certification
procedure by which a third party gives written assurance that a product, process or service
conforms to specified requirements, also known as conformity assessment
3.5
certification body
body that conducts certification of conformity
3.6
certification system
system that has specific rules for procedure and management to carry out certification of
conformity
3.7
commissioning
process that encompasses functional safety checks, connecting the wind turbine to the grid
and putting it into operation
3.8
conformity statement
document issued upon successful completion of evaluation of a certification module
The statement includes identification of the receiver, the object, the main normative
standards, evaluation and measurement reference reports, validity and certification body.
3.9
evaluation for conformity
systematic examination of the extent to which a product, process or service fulfils specified
requirements
– 12 – 61400-22 © IEC:2010
3.10
final evaluation report
report containing the results of conformity evaluations relating to type certification

the basis for the decision to issue the type certificate

3.11
inspection
systematic examination of the extent to which a product, process or service fulfils specified

requirements by means of measuring, observing, testing or gauging the relevant

characteristics
3.12
installation
process that encompasses site fabrication, assembly and erection
3.13
manufacture
process that encompasses fabrication and assembly in a factory or workshop
3.14
manufacturer
entity manufacturing the wind turbine or, where relevant, main components of the wind turbine
3.15
modification
a new installation or changes to an existing installation, which changes the original
design/specification
3.16
operating body
body that conducts certification of conformity, testing or inspection
3.17
project certificate
document issued upon successful completion of project certification
3.18
project certification
procedure by which a certification body gives written assurance that one or more specific wind
turbines including support structure and possibly other installations are in conformity with
requirements for a specific site

3.19
rotor nacelle assembly
RNA
part of a wind turbine carried by the support structure, see 3.22
3.20
repair
repair of a unit or a piece of equipment to its original design/specification
3.21
replacement
replacement of a unit or a piece of equipment in conformance with its original
design/specification
61400-22 © IEC:2010 – 13 –
3.22
support structure
part of a wind turbine consisting of the tower, sub-structure and foundation, see Figure 1 of

IEC 61400-3
3.23
surveillance
continuing monitoring and verification of the status of procedures, products and services, and

analysis of records in relation to referenced documents to ensure specified requirements are
met
3.24
type certificate
document issued upon the successful completion of type certification
3.25
type certification
procedure by which a certification body gives written assurance that a wind turbine type
conforms to specified requirements
3.26
type testing
action of carrying out tests for a given wind turbine type according to specified procedures
3.27
wind turbine type
wind turbines of a common design, materials and major components, subject to a common
manufacturing process and uniquely described by specific values or ranges of values of
machine parameters and design conditions
4 Symbols and abbreviations
4.1 Symbols
The relevant symbols contained in IEC 61400-1 are applicable.
4.2 Abbreviations
RNA rotor/nacelle assembly
SWT small wind turbine(s)
WT wind turbine(s)
5 Acceptance of operating bodies
5.1 General
Operating bodies shall be capable and competent to operate their elements of the wind
turbine certification process in an impartial manner and shall comply with the relevant
ISO/IEC publications among the following: ISO/IEC 17020, ISO/IEC 17021, ISO/IEC 17025
and ISO/IEC Guide 65.
5.2 Accreditation
Operating bodies shall be accredited by a national or international accreditation body that has
been internationally evaluated. This requirement is intended to facilitate recognition
arrangements on an international level of certificates and test results and to increase public
confidence in the competence and impartiality of the operating bodies.

– 14 – 61400-22 © IEC:2010
5.3 Recognition arrangements
Operating bodies shall seek to obtain, preferably multilateral, recognition arrangements for

the acceptance of each other’s work, e.g. test results or quality system certificates. Such

arrangements shall be established with reference to the requirements of this standard.

When the operating bodies have been accredited by a common accreditation body or where

recognition arrangements exist between the corresponding accreditation bodies, the

accreditation forms a sufficient basis for mutual recognition of work under the accreditation.

If a recognition arrangement based on accreditation is not possible, a recognition

arrangement between operating bodies should include:
– the scope of the agreement;
– specification of the parts of the wind turbine certification system with unrestricted
acceptance;
– identification of the signatories and their legal status;
– agreement regarding surveillance of each other’s work;
– a procedure for handling complaints and appeals;
– definition of the parties’ responsibilities;
– details of lines of communication;
– undertakings regarding confidentiality and security; and
– a procedure for maintenance of a register of certificates, conformity statements and
test reports issued by the bodies of the agreement.
5.4 Advisory committee
Certification bodies operating type and project certification according to this standard shall
seek to establish and participate in a joint advisory committee. The committee should
establish by-laws and provide advice to the operating bodies on:
– harmonization of requirements for documentation for certification;
– mutual recognition;
– need for amendments to procedures and requirements;
– interpretation of procedures and requirements for documentation for conformity
assessment; and
– interpretation of technical requirements.
The recommendations from meetings of the advisory committee shall be made available to

accreditation institutes or other relevant boards.
6 Management of the certification system
6.1 General
The certification system shall be managed and operated in accordance with
ISO/IEC Guide 65. For project and prototype certification the system may alternatively be
managed and operated in accordance with ISO/IEC 17020, in which case certification system
elements on 8.3 or 9.5 shall be managed and operated in accordance with ISO/IEC Guide 65.

61400-22 © IEC:2010 – 15 –
6.2 Agreement on certification

A certification body shall upon request be prepared to take on work for certification of wind

turbines or wind farm projects according to the rules of this standard. The services of the

certification body shall be available to all applicants without undue financial or other

conditions.
Prior to starting certification work an agreement between applicant and certification body shall

be made. In addition to financial and other usual contract conditions, the agreement shall

include:
– the scope of the certification;
– the identification of collaborating bodies (inspection or testing bodies), their
accreditation and their responsibilities;
– the set of IEC 61400 standards and other technical requirements to which conformity
shall be evaluated;
– a description of the scope of documentation to be supplied by the applicant for
evaluation, e.g. see Annex A: Design documentation; and
– conditions for reporting and investigating incidents.
6.3 Issue of certificates and conformity statements
The certification system covers the issue of certificates and conformity statements.
A certificate or conformity statement is based on evaluation of wind turbine documentation
and the results of inspection, surveillance or testing, as applicable. The results of evaluation
shall be documented in a final report. A certificate or a conformity statement shall be issued
on the basis of an assessment of the completeness and correctness of an evaluation report or
reports.
In the case of outstanding issues of no importance to the primary safety of the certified object,
a provisional certificate or conformity statement may be issued for a limited period of validity
that permits evaluation and verification of the outstanding issues.
A certificate or conformity statement shall identify the scope of evaluation, the wind turbine,
the supplier, the design assumptions and the set of normative documents, standards and
other technical requirements. Examples, showing a suitable format and the minimum
information, are given in Annex B.
6.4 Security of relevant documentation

The certification body shall keep a file of all received material that is relevant to the certificate
or conformity statement. This file shall be kept in a place with restricted access for at least 5
years plus the design lifetime of the object, for certification after the later date of receipt of the
material or expi
...