IEC IEC 60034-27-4 Edition1.02018-01 INTERNATIONAL STANDARD NORME INTERNATIONALE colour inside Rotating electrical machines- Part27-4:Measurement of insulation resistanceand polarization indexof windinginsulationofrotatingelectrical machines Machineselectriquestournantes- Partie 27-4:Mesure de la resistanced'isolement et deI'index depolarisation sur lesystemed'isolationdesenroulementsdesmachinesélectriquestournantes /on02Jan2019(Docu IEC600sacessebyds-LIBRARY THISPUBLICATIONISCOPYRIGHTPROTECTED Copyright2018IEC,Geneva,Switzerland or by any means, electronic or mechanical, including photocopying and microfilm,without permission in writing from eitherIECorIEC'smemberNationalCommitteeinthecountryoftherequester.IfyouhaveanyquestionsaboutIEC your local IEC member National Committee forfurther information. Droits de reproduction réserves. Sauf indication contraire, aucune partie de cette publication ne peut etre reproduite et les microfilms, sans I'accord écrit de I'lEc ou du Comite national de IlEC du pays du demandeur.Si vous avez des questions sur le copyright de IEC ou si vous desirez obtenir des droits supplementaires sur cette publication, utilisez les coordonnees ci-apres ou contactez le Comite national de I'lEC devotre pays de residence. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varembé [email protected] CH-1211Geneva20 www.iec.ch Switzerland Aboutthe IEC The International Electrotechnical Commission (IEC)is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. AboutIEcpublications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latestedition,acorrigendaoranamendmentmighthavebeenpublished. IEcCatalogue-webstore.iec.ch/catalogue Electropedia-www.electropedia.org The stand-alone application for consulting theentire The world's leading online dictionary of electronic and bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in Technical Reports Technical Specifications, other English and French, with equivalent terms in 16 additional and documents.Available for PC,Mac OS, Android Tablets and languages.Also known as the International Electrotechnical iPad. Vocabulary (IEV) online. IECpublicationssearch-webstore.iec.ch/advsearchform lECGlossary-std.iec.ch/glossary The advanced search enables to find IEC publications by a variety ofcriteria (reference number, text, technical French extracted from the Terms and Definitions clause of committee,..). It also gives information on projects, replaced IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77, 86 and and withdrawnpublications. CISPR. IEC Just Published-webstore.iec.ch/justpublished Stay up todate on all new IEC publications.Just Published IECCustomerServiceCentre-webstore.iec.ch/csc details all new publications released.Available online and If you wishto giveus yourfeedback onthis publicationor also oncea monthby email. needfurtherassistance,pleasecontacttheCustomerService Centre:[email protected]. Apropos de I'IEC La Commission Electrotechnique Internationale (IEC)est la premiere organisationmondiale qui élabore et publie des Normes internationalespourtoutcequiatraitaI'électricite,aI'electronique etauxtechnologies apparentées. AproposdespublicationsIEC Le contenu technique des publications IEC est constamment revu.Veuillez vous assurer que vous possedez I'edition la plusrécente,un corrigendumouamendementpeutavoirétepublié. Catalogue lEC-webstore.iec.ch/catalogue Electropedia-www.electropedia.org Applicationautonomepourconsultertouslesrenseignements Le premier dictionnaire en ligne de termes électroniques et Normes bibliographiques sur internationales, électriques.Ilcontient210o0termes etdefinitionsen anglais Specifications techniques, Rapports techniques et autres documentsdeI'IEC.DisponiblepourPC,MacOS,t