LEC IEC61869-20 Edition1.0 2025-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Instrumenttransformers Part20:Safetyrequirementsof instrumenttransformersforhighvoltage applications Transformateursdemesure Partie2o:Exigencesdesécuritedestransformateursdemesurepour applicationsahautetension IEC 61869-20:2025-04(en-fr) THISPUBLICATIONISCOPYRIGHTPROTECTED Copyright2025IEC,Geneva,Switzerland 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 reserves. Sauf indication contraire, aucune partie de cette publication ne peut etre reproduite ni utilisee sous quelque forme que ce soit et par aucun procede,electronique ou mecanique, y compris la photocopie et les microfilms, sans I'accord ecrit de I'IEC ou du Comite national de I'iEc du pays du demandeur.Si vous avez des questions sur le copyright de IlEC ou si vous desirez obtenir des droits supplementaires sur cette publication, utilisez les coordonnees ci-apres ou contactez le Comite national de I'lEC de votre pays de residence. IEC Secretariat Tel.: +41 22 919 02 11 3, rue de Varembe [email protected] CH-1211 Geneva 20 www.iec.ch Switzerland 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 corrigendumoran amendmentmight have beenpublished. IECpublicationssearch-webstore.iec.ch/advsearchform IEcProducts&ServicesPortal-products.iec.ch The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the varietyof criteria(reference number, text, technical publications previews, graphical symbols and the glossary. committee, ...). It also gives information on projects, replaced With a subscription you will always have access to up to date and withdrawn publications. contenttailored toyour needs IECJustPublished-webstore.iec.ch/justpublished Electropedia-www.electropedia.org Stay up to date on all new IEC publications. Just Published The world's leading online dictionary on electrotechnology. detailsall newpublications released.Available online andonce containing more than 22 500 terminological entries in English a month by email. and French, with equivalent terms in 25 additional languages. Also known as the International Electrotechnical Vocabulary IECustomer ServiceCentre-webstore.iec.ch/csc (IEV) online. If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:[email protected]. A propos de I'IEC La Commission Electrotechnique Internationale (IEC)est la premiere organisation mondiale qui elabore et publie des Normes internationales pour tout ce qui a trait a 'electricite, a I'electronique et aux technologies apparentees. AproposdespublicationsIEc Le contenu technique des publications IEC est constamment revu.Veuillez vous assurer que vous possedez I'edition la plus recente,un corrigendum ou amendement peut avoir etepublie RecherchedepublicationsIEC. IEC Products &Services Portal-products.iec.ch webstore.iec.ch/advsearchform Decouvrez notre puissant moteur de recherche et consultez La recherche avancee permet de trouver des publications IEC gratuitement tous les apercus des publications, symboles en utilisant differents criteres (numero de reference, texte, graphiques et le glossaire. Avec un abonnement, vous aurez comite d'etudes, ..). Elle donne aussi des informations sur les toujours ac