IEC_60364-4-43_64_1347_CD.pdfVIP免费

64/1347/CDCOMMITTEEDRAFT(CD)IEC/TCorSC:TC64ProjectnumberIEC60364-4-43,Ed.3TitleofTC/SC:ElectricalinstallationsandprotectionagainstelectricalshockDateofcirculation2003-10-24Closingdateforcomments2004-01-30AlsoofinteresttothefollowingcommitteesSupersedesdocument64/1289/MCRFunctionsconcerned:SafetyEMCEnvironmentQualityassuranceSecretary:Mr.R.Pelta(Germany)E-mail:reinhard.pelta@siemens.comTHISDOCUMENTISSTILLUNDERSTUDYANDSUBJECTTOCHANGE.ITSHOULDNOTBEUSEDFORREFERENCEPURPOSES.RECIPIENTSOFTHISDOCUMENTAREINVITEDTOSUBMIT,WITHTHEIRCOMMENTS,NOTIFICATIONOFANYRELEVANTPATENTRIGHTSOFWHICHTHEYAREAWAREANDTOPROVIDESUPPORTINGDOCUMENTATION.Title:IEC60364-4-43,Ed.3:Electricalinstallationsofbuildings-Part4-43:Protectionforsafety-Protectionagainstovercurrent(Titre):IntroductorynoteThisdocumenthasbeenpreparedbyTC64/WG2.FORMCD(IEC)2002-05-14Copyright©2003InternationalElectrotechnicalCommission,IEC.Allrightsreserved.Itispermittedtodownloadthiselectronicfile,tomakeacopyandtoprintoutthecontentforthesolepurposeofpreparingNationalCommitteepositions.Youmaynotcopyor"mirror"thefileorprintedversionofthedocument,oranypartofit,foranyotherpurposewithoutpermissioninwritingfromIEC.XXXIEC:200X–2–64/1347/CDELECTRICALINSTALLATIONSOFBUILDINGS–Part4-43:Protectionforsafety–Protectionagainstovercurrent430Introduction430.1(431)1ScopePart4-43ofIEC60364describeshowliveconductorsareprotectedbyoneormoredevicesforautomaticinterruptionofthesupplyintheeventofoverload(seeclause433)andshort-circuits(seeclause434)exceptincaseswheretheovercurrentislimitedinaccordancewithclause436orbytheconditionsdescribedin433.4,443.5or443.3aremet.Further,protectionagainstoverloadandagainstshort-circuitsshallbeco-ordinatedinaccordancewithclause436.NOTE1Liveconductorsprotectedagainstoverloadinaccordancewithclause434areconsideredtobeprotectedalsoagainstfaultslikelytocauseovercurrentsofamagnitudesimilartooverloadcurrents.NOTE2Therequirementsofthisstandarddonottakeaccountofexternalinfluences.Fortheapplicationofprotectivemeasuresinrela...