Publication60076-3delaCE1(Deuxibmeédition-2000)IECPublication60076-3(Secondedition-2000)Transformateursdepuissance-Powertransformers-Partie3:Niveauxd’isolement,essaisPart3:Insulationlevels,dielectrictestsdiélectriquesetdistancesd’isolementandexternalclearancesinairdansl’airCORRIGENDUMPage20Page21Exemple3:Example3Aulieude:1050/300/570lire:1050/1300/570Page32Tableau4Insteadof:1050/300/570read:1050/1300/570Page33Table4Remplacerletableau4existantparleReplacetheexistingtable4bythefollowingnouveautableau4suivant:newtable4:COPYRIGHTInternationalElectrotechnicalCommissionLicensedbyInformationHandlingServicesCOPYRIGHTInternationalElectrotechnicalCommissionLicensedbyInformationHandlingServicesTable4-RatedwithstandvoltagesfortransformerwindingswithU,,,>170kVHighestvoltageforsourceACwithstandphase-to-earthinducedorseparatewithstandvoltagewithstandvoltageequipmentU,Ratedshort-durationRatedlightningimpulseRatedswitchingimpulsekVr.m.skVpeakkVpeakvoltagekVr.m.s.....................................650550325......420550800*1!5\?=.....................1175105011751300.........................................1425.....................-1550...................................................-1300--167518001950-2100,460'510'570630680note3note3note3NOTE1DottedlinesarenotinlinewithIEC60071-1butarecurrentpracticeinsomecountries.NOTE2ForuniformlyinsulatedtransformerswithextremelylowvaluesofratedACinsulationlevels,specialmeasuresmayhavetobetakentoperformtheshort-durationACinducedtest,see12.2.NOTE3Notapplicable,unlessotherwiseagreed.NOTE4Forvoltagesgiveninthelastcolumn,highertestvoltagesmayberequiredtoprovethattherequiredphase-to-phasewithstandvoltagesaremet.ThisisvalidforthelowerinsulationlevelsassignedtothedifferentU,inthetable.COPYRIGHTInternationalElectrotechnicalCommissionLicensedbyInformationHandlingServicesCOPYRIGHTInternationalElectrotechnicalCommissionLicensedbyInformationHandlingServicesTableau4-TensionsdetenuenormaliséespourlesenroulementsdetransformateuravecU,,,>170kVITension...
