IEC_CISPR_TR_18-3-2010.pdf

TR CISPR 18-3Edition 2.0 2010-06TECHNICAL REPORT Radio interference characteristics of overhead power lines and high-voltage equipment Part 3:Code of practice for minimizing the generation of radio noise TR CISPR 18-3:2010(E)INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 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 IECs 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.IEC Central Office 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch 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.?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to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn and replaced publications.?IEC Just Published:www.iec.ch/online_news/justpub Stay up to date on all new IEC publications.Just Published details twice a month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.?Electropedia:www.electropedia.org The worlds 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.?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:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.TR CISPR 18-3Edition 2.0 2010-06TECHNICAL REPORT Radio interference characteristics of overhead power lines and high-voltage equipment Part 3:Code of practice for minimizing the generation of radio noise INTERNATIONAL ELECTROTECHNICAL COMMISSION XICS 33.100.01 PRICE CODEISBN 978-2-88912-018-5INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE Registered trademark of the International Electrotechnical Commission Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.2 TR CISPR 18-3 IEC:2010(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.8 2 Normative references.8 3 Terms and definitions.8 4 Practical design of overhead power lines and associated equipment in order to control interference to radio broadcast sound and television reception.8 4.1 Overview.8 4.2 Corona on conductors.9 4.3 Corona on metal hardware.9 4.4 Surface discharges on insulators.9 4.4.1 Clean or slightly polluted insulators.9 4.4.2 Very polluted insulators.10 4.5 Spark and microsparks due to bad contacts,commutation effects.10 4.6 Defects on power lines and associated equipment in service.10 5 Methods of prediction of the reference level of an overhead line.11 5.1 General.11 5.2 Correlation of data given elsewhere in this publication.11 5.3 CIGR formula.12 5.4 Determination of 80%level.13 5.5 Conclusions.13 6 Preventive and remedial measures to minimize radio noise generated by bad contacts and their detection and location.14 6.1 General.14 6.2 Preventive and remedial measures.14 6.3 Methods of detecting and locating bad contacts.15 7 Formulae for predetermination of the radio noise field strength produced by large conductor bundles(more than four sub-conductors)and by tubular conductors.17 7.1 Basic principles.17 7.2 Calculation of corona radio noise field strengths due to large bundles.18 7.2.1 Procedure for the predetermination of the radio noise field strength.18 7.2.2 Calculation of the excitation function in heavy rain.18 7.2.3 Correction factor to evaluate the excitation function in other weather categories.19 7.2.4 Calculation of the radio noise field str