ANSI IEEE C57.12.80-1978 Terminology for Power and

ANSI/IEEEC57.12.80-1978AnAmericanNationalStandardIEEEStandardTerminologyforPowerandDistributionTransformersSponsorTransformersCommitteeoftheIEEEPowerEngineeringSocietyApprovedJune3,1976ReaffirmedJune19,1986ReaffirmedMay1,1992IEEEStandardsBoardSecretariatNationalElectricManufacturersAssociationEdisonElectricInstituteInstituteofElectricalandElectronicsEngineersApprovedApril7,1977ReaffirmedDecember2,1992AmericanNationalStandardsInstitutePublishedbyTheInstituteofElectricalandElectronicsEngineers,Inc345East47thStreet,NewYork,NY10017©Copyright1978byTheInstituteofElectricalandElectronicsEngineers,IncNopartofthispublicationmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher(Reaffirmed1986)(RevisionofC57.12.80-1958)iiAmericanNationalStandardAnAmericanNationalStandardimpliesaconsensusofthosesubstantiallyconcernedwithitsscopeandprovisions.AnAmericanNationalStandardisintendedasaguidetoaidthemanufacturer,theconsumer,andthegeneralpublic.TheexistenceofanAmericanNationalStandarddoesnotinanyrespectprecludeanyone,whetherhehasapprovedthestandardornot,frommanufacturing,marketing,purchasing,orusingproducts,processes,orproceduresnotconformingtothestandard.AmericanNationalStandardsaresubjecttoperiodicreviewandusersarecautionedtoobtainedthelatesteditions.CAUTIONNOTICE:ThisAmericanNationalStandardmayberevisedorwithdrawnatanytime.TheproceduresoftheAmericanNationalStandardsInstituterequirethatactionbetakentoreafÞrm,revise,orwithdrawthisstandardnolaterthanÞveyearsfromthedateofpublication.PurchasersofAmericanNationalStandardsmayreceivecurrentinformationonallstandardsbycallingorwritingtheAmericanNationalStandardsInstitute.iiiForeword(ThisForewordisnotapartofANSI/IEEEC57.12.80-1978,AmericanNationalStandardTerminologyforPowerandDistributionTransformers.)ThisrevisionofANSIC57.12.80incorporatesasubstantialnumberofchangessincethelastmajorrevisionoccurredin1958.Inadditiontoprovidingmanynewterms,someofthemoresigniÞcantchangeswhichhavebeenintroducedinclude:1)Changeinorganizationstructure,asshowninthetableofcontents2)Additionofreferencestandards3)AsectionofTransformerDeÞnitionsconsideringgeneralandspecializedtypesandclassiÞedbysize,insulation,andlocation.Thesearecross-referencedtoothersectionswhereappropriate.4)Groupingoftermsrelatingtoratingdatainaseparatesection5)Anewsectionrelatingtoinsulationterms.Thisincludesnumeroustermsconcerningthenewinsulationtemperatureclassratings,includingidentiÞcationbytemperatureindex,andnewinsulationcoordinationterms.6)AnewsectiononTesting7)Expansionoftermsconcerningconstructionandlocationinaseparatesection8)AdditionofasectionofTerminologyforSpecializedTypesofTransformers9)Additionofanumberofsystemtermsapplicabletotransformers.OneofthesigniÞcantgoalsinthisnewrevisionwastoalsoprovideinputforrevisionofIEEEStd100-1972(ANSIC42.100-1972),IEEEStandardDictionaryofElectricalandElectronicsTerms.Anefforthasbeenmadetousecommontermswheneverpossible.TheIEEETransformersCommitteeoftheIEEEPowerEngineeringSocietyprovidedmanyveryhelpfulquestionsandcomments,andtheIEEEStandardsBoardwasparticularlyhelpfulinfurnishingabroadperspectiveandmanyconstructiveinputs.Suggestionsforimprovementofthisstandardwillbewelcome.TheyshouldbesenttotheAmericanNationalStandardsInstitute1430BroadwayNewYork,NY10018Atthetimeitapprovedthisstandard,C57hadthefollowingmembership:H.D.Lewis,ChairC.R.Wilmore,SecretaryBonnevillePowerAdministration............................................................................................................GeorgeW.IliffElectricLightandPowerGroup.......................................................................................................................R.P.BastI.O.BerkhanI.H.KoponenJ.P.Markey(Alt)P.H.PhilippidisB.F.SmithFurnaceEquipmentManufacturersAssociation...............................................................................................................InstituteofElectricalandElectronicsEngineers.............................................................................................S.BennonW.P.BurtJ.C.DuttonD.C.Johnson(Alt)L.W.LongOrganizationRepresentedNameofRepresentativeivD.E.MasseyNavalFacilitiesEngineeringCommand...........................................................................................LeonardW.JohnsonNationalElectricalManufacturersAssociation.............................................................................................L.C.AicherW.R.CourtadeJ.D.DouglassW.C.KendallH.D.LewisG.W.MayaIl(Alt)W.J.McNuttNormanM.Neagle(Alt)R.L.SchwabR.E.Uptegraff,JrG.C.WilburnRuralElectriÞcationAdministration........................................................................................................J.C.Arnold,JrTennesseeValleyAuthority............................................................................................................................L.R.SmithUnderwritersLaboratories..............................................................................................................W.A.Farquhar