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IEC 60076-22-6 Edition 1.0 2021-01 INTERNATIONAL STANDARD NORME INTERNATIONALE

IEC 60076-22-6 Edition 1.0 2021-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Power transformers – Part 22-6: Power transformer and reactor fittings – Electric fans for transformers Transformateurs de puissance – Partie 22-6: Accessoires pour transformateurs de puissance et bobines d'inductance – Ventilateurs électriques pour transformateurs IEC 60076-22-6:2021-01(en-fr) ® THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright © 2021 IEC, Geneva, Switzerland 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. 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Egalement appelé Vocabulaire Electrotechnique International (IEV) en ligne. IEC 60076-22-6 Edition 1.0 2021-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Power transformers – Part 22-6: Power transformer and reactor fittings – Electric fans for transformers Transformateurs de puissance – Partie 22-6: Accessoires pour transformateurs de puissance et bobines d'inductance – Ventilateurs électriques pour transformateurs INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 29.180 ISBN 978-2-8322-9252-5 ® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale ® Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé. – 2 – IEC 60076-22-6:2021 © IEC:2021 CONTENTS FOREWORD ........................................................................................................................... 3 1 Scope .............................................................................................................................. 5 2 Normative references ...................................................................................................... 5 3 Terms and definitions ...................................................................................................... 6 4 Service conditions ........................................................................................................... 6 4.1 General ................................................................................................................... 6 4.2 Degree of protection of electrical components (IP) .................................................. 6 4.3 Corrosion protection ............................................................................................... 6 5 General characteristics and requirements ........................................................................ 7 5.1 Main components and characteristics ..................................................................... 7 5.1.1 Nameplate and rating plates ............................................................................ 7 5.1.2 Motor drive ...................................................................................................... 7 5.1.3 Connection box ................................................................................................ 8 5.1.4 Housing ........................................................................................................... 8 5.1.5 Fan wheel ........................................................................................................ 8 5.1.6 Protective grating ............................................................................................ 8 5.1.7 Materials ......................................................................................................... 9 5.1.8 Vibration limits ................................................................................................. 9 5.2 Supply conditions .................................................................................................... 9 5.2.1 Transport and storage ..................................................................................... 9 5.2.2 Installation and operation, operational performance ......................................... 9 5.2.3 Technical documentation ................................................................................. 9 5.3 Performance requirements .................................................................................... 10 5.3.1 General ......................................................................................................... 10 5.3.2 Rated values ................................................................................................. 10 5.3.3 Ambient conditions for rated power and noise ................................................ 10 5.4 Tests .................................................................................................................... 10 5.4.1 General ......................................................................................................... 10 5.4.2 List of tests .................................................................................................... 11 5.4.3 Routine tests ................................................................................................. 11 5.4.4 Type tests ...................................................................................................... 11 Annex A (normative) Ordering designations ......................................................................... 12 A.1 Minimal ordering designations ............................................................................... 12 A.2 Additional specifications (if necessary) ................................................................. 12 Annex B (informative) Performance of the fans – Typical fan characteristic speed controlled curves .................................................................................................................. 13 Annex C (informative) Design examples ............................................................................... 14 Bibliography .......................................................................................................................... 16 Figure B.1 – Performance of the fans .................................................................................... 13 Figure C.1 – Fan design example ......................................................................................... 14 Figure C.2 – Fan design example with guide vane ................................................................ 15 Table C.1 – Common selection of materials used in the construction .................................... 15 IEC 60076-22-6:2021 © IEC:2021 – 3 – INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________ POWER TRANSFORMERS – Part 22-6: Power transformer and reactor fittings – Electric fans for transformers 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 uploads/Geographie/iec-60076-22-6-2021-01.pdf