EN 61400-2:2006

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EUROPEAN STANDARD EN 61400-2 NORME EUROPÉENNE
EUROPÄISCHE NORM July 2006
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2006 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61400-2:2006 E
ICS 27.180 Supersedes EN 61400-2:1996
English version
Wind turbines
Part 2: Design requirements for small wind turbines (IEC 61400-2:2006)
Aérogénérateurs
Partie 2: Exigences en matière de conception des petits aérogénérateurs (CEI 61400-2:2006)
Windenergieanlagen
Teil 2: Sicherheit kleiner Windenergieanlagen (IEC 61400-2:2006)
This European Standard was approved by CENELEC on 2006-05-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard 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 Central Secretariat or to any CENELEC member.
This European Standard 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

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Foreword The text of document 88/254/FDIS, future edition 2 of IEC 61400-2, prepared by IEC TC 88, Wind turbines, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61400-2 on 2006-05-01. This European Standard supersedes EN 61400-2:1996. The most significant changes with respect to EN 61400-2:1996 are: – revised simplified equations based upon recent test and research results; – several parameters in the simplified equations shall now be based upon test results; – added option for use of aeroelastic models instead of simplified equations; – expanded testing requirements. The following dates were fixed: – latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop)
2007-02-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)
2009-05-01 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard IEC 61400-2:2006 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: ISO/IEC 17020 NOTE
Harmonized as EN ISO/IEC 17020:2004 (not modified). ISO 9001 NOTE
Harmonized as EN ISO 9001:2000 (not modified). ISO 9002 NOTE
Harmonized as EN ISO 9002:1994 (not modified). ISO 9003 NOTE
Harmonized as EN ISO 9003:1994 (not modified). __________

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Annex ZA
(normative)
Normative references to international publications with their corresponding European publications
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
When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
Publication Year Title EN/HD Year
IEC 60034-1 -1) Rotating electrical machines
Part 1: Rating and performance EN 60034-1 20042)
IEC 60034-2 -1) Rotating electrical machines
Part 2: Methods for determining losses and efficiency of rotating electrical machinery from tests (excluding machines for traction vehicles) EN 60034-2
19962)
IEC 60034-5
-1)
Rotating electrical machines
Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP code) - Classification EN 60034-5 20012)
IEC 60034-8
-1) Rotating electrical machines
Part 8: Terminal markings and direction of rotation EN 60034-8 20022)
IEC 60038 (mod) + A1 + A2 1983 1994 1997 IEC standard voltages3) HD 472 S1 + corr. February
+ A1 1989 2002 1995
IEC 60204-1 (mod) -1) Safety of machinery - Electrical equipment of machines
Part 1: General requirements EN 60204-1 20062)
IEC 60364-5-54 (mod) -1) Electrical installations of buildings
Part 5-54: Selection and erection of electrical equipment - Earthing arrangements, protective conductors and protective bonding conductors HD 60364-5-54 20062)
IEC 60721-2-1 -1) Classification of environmental conditions Part 2-1: Environmental conditions appearing in nature - Temperature and humidity HD 478.2.1 S1
19892)
IEC 61400-1 -1) Wind turbines
Part 1: Design requirements EN 61400-1 20052)
IEC 61400-12-1 -1) Wind turbines
Part 12-1: Power performance measurements of electricity producing wind turbines EN 61400-12-1 20062)
1) Undated reference. 2) Valid edition at date of issue. 3) The title of HD 472 S1 is: Nominal voltages for low voltage public electricity supply systems.

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Publication Year Title EN/HD Year IEC/TS 61400-13 -1) Wind turbine generator systems
Part 13: Measurement of mechanical loads - -
IEC/TS 61400-23 -1) Wind turbine generator systems
Part 23: Full-scale structural testing of rotor blades - -
IEC 61643-1 (mod) -1) Low-voltage surge protective devices
Part 1: Surge protective devices connected to low-voltage power distribution systems - Requirements and tests EN 61643-11 20022)
ISO/IEC 17025 2005 General requirements for the competence of testing and calibration laboratories EN ISO/IEC 17025 2005
ISO 2394 -1) General principles on reliability for structures - -

NORME INTERNATIONALECEIIEC INTERNATIONAL STANDARD 61400-2Deuxième éditionSecond edition2006-03 Aérogénérateurs – Partie 2: Exigences en matière de conception des petits aérogénérateurs
Wind turbines – Part 2: Design requirements for small
wind turbines
Pour prix, voir catalogue en vigueur For price, see current catalogue IEC 2006
Droits de reproduction réservés

Copyright - all rights reserved 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 l'éditeur. 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 the publisher. International Electrotechnical Commission,
3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch
Web: www.iec.ch CODE PRIX PRICE CODE XC Commission Electrotechnique InternationaleInternational Electrotechnical Commission

61400-2  IEC:2006 – 3 – CONTENTS FOREWORD.9
1 Scope.13 2 Normative references.13 3 Terms and definitions.15 4 Symbols and abbreviated terms.29 4.1 Symbols.29 4.2 Coordinate system.37 5 Principal elements.39 5.1 General.39 5.2 Design methods.39 5.3 Quality assurance.39 6 External conditions.43 6.1 General.43 6.2 SWT classes.43 6.3 Wind conditions.45 6.4 Other environmental conditions.57 6.5 Electrical load conditions.61 7 Structural design.63 7.1 General.63 7.2 Design methodology.63 7.3 Loads and load cases.63 7.4 Simplified load model.67 7.5 Aeroelastic modelling.79 7.6 Load measurements.87 7.7 Stress calculation.87 7.8 Safety factors.89 7.9 Limit state analysis.91 8 Protection and shutdown system.93 8.1 General.93 8.2 Functional requirements of the protection system.93 8.3 Manual shutdown.93 8.4 Shutdown for maintenance.93 9 Testing.95 9.1 General.95 9.2 Tests to verify design data.95 9.3 Mechanical load testing.97 9.4 Duration testing.99 9.5 Mechanical component testing.105 9.6 Safety and function.107 9.7 Environmental testing.109 9.8 Electrical.109

61400-2  IEC:2006 – 5 – 10 Electrical system.109 10.1 General.109 10.2 Protective devices.109 10.3 Disconnect device.109 10.4 Earthing systems.111 10.5 Lightning protection.111 10.6 Electrical conductors and cables.111 10.7 Electrical loads.111 11 Support structure.115 11.1 General.115 11.2 Dynamic requirements.115 11.3 Environmental factors.115 11.4 Earthing.115 11.5 Foundation.115 11.6 Turbine access design loads.115 12 Documentation requirements.115 12.1 General.115 12.2 Installation.117 12.3 Operation.117 12.4 Maintenance and routine inspection.
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