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IEC60990:2016-05(en-fr)INTERNATIONALSTANDARDNORMEINTERNATIONALEIEC60990Edition3.02016-05colourinsideMethodsofmeasurementoftouchcurrentandprotectiveconductorcurrentMthodesdemesureducourantdecontactetducourantdansleconducteurdeprotectionTHISPUBLICATIONISCOPYRIGHTPROTECTEDCopyright2016IEC,Geneva,SwitzerlandAllrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromeitherIECorIECsmemberNationalCommitteeinthecountryoftherequester.IfyouhaveanyquestionsaboutIECcopyrightorhaveanenquiryaboutobtainingadditionalrightstothispublication,pleasecontacttheaddressbeloworyourlocalIECmemberNationalCommitteeforfurtherinformation.Droitsdereproductionrservs.Saufindicationcontraire,aucunepartiedecettepublicationnepeuttrereproduiteniutilisesousquelqueformequecesoitetparaucunprocd,lectroniqueoumcanique,ycomprislaphotocopieetlesmicrofilms,sanslaccordcritdelIECouduComitnationaldelIECdupaysdudemandeur.SivousavezdesquestionssurlecopyrightdelIECousivousdsirezobtenirdesdroitssupplmentairessurcettepublication,utilisezlescoordonnesci-aprsoucontactezleComitnationaldelIECdevotrepaysdersidence.IECCentralOffice3,ruedeVarembCH-1211Geneva20SwitzerlandTel.:+41229190211Fax:+41229190300infoiec.chwww.iec.chAbouttheIECTheInternationalElectrotechnicalCommission(IEC)istheleadingglobalorganizationthatpreparesandpublishesInternationalStandardsforallelectrical,electronicandrelatedtechnologies.AboutIECpublicationsThetechnicalcontentofIECpublicationsiskeptunderconstantreviewbytheIEC.Pleasemakesurethatyouhavethelatestedition,acorrigendaoranamendmentmighthavebeenpublished.IECCatalogue-webstore.iec.ch/catalogueThestand-aloneapplicationforconsultingtheentirebibliographicalinformationonIECInternationalStandards,TechnicalSpecifications,TechnicalReportsandotherdocuments.AvailableforPC,MacOS,AndroidTabletsandiPad.IECpublicationssearch-www.iec.ch/searchpubTheadvancedsearchenablestofindIECpublicationsbyavarietyofcriteria(referencenumber,text,technicalcommittee,).Italsogivesinformationonprojects,replacedandwithdrawnpublications.IECJustPublished-webstore.iec.ch/justpublishedStayuptodateonallnewIECpublications.JustPublisheddetailsallnewpublicationsreleased.Availableonlineandalsoonceamonthbyemail.ETheworldsleadingonlinedictionaryofelectronicandelectricaltermscontaining20000termsanddefinitionsinEnglishandFrench,withequivalenttermsin15additionallanguages.AlsoknownastheInternationalElectrotechnicalVocabulary(IEV)online.IECGlossary-std.iec.ch/glossary65000electrotechnicalterminologyentriesinEnglishandFrenchextractedfromtheTermsandDefinitionsclauseofIECpublicationsissuedsince2002.SomeentrieshavebeencollectedfromearlierpublicationsofIECTC37,77,86andCISPR.IECCustomerServiceCentre-webstore.iec.ch/cscIfyouwishtogiveusyourfeedbackonthispublicationorneedfurtherassistance,pleasecontacttheCustomerServiceCentre:csciec.ch.AproposdelIECLaCommissionElectrotechniqueInternationale(IEC)estlapremireorganisationmondialequilaboreetpubliedesNormesinternationalespourtoutcequiatraitllectricit,llectroniqueetauxtechnologiesapparentes.AproposdespublicationsIECLecontenutechniquedespublicationsIECestconstammentrevu.Veuillezvousassurerquevouspossdezlditionlaplusrcente,uncorrigendumouamendementpeutavoirtpubli.CatalogueIEC-webstore.iec.ch/catalogueApplicationautonomepourconsultertouslesrenseignementsbibliographiquessurlesNormesinternationales,Spcificationstechniques,RapportstechniquesetautresdocumentsdelIEC.DisponiblepourPC,MacOS,tablettesAndroidetiPad.RecherchedepublicationsIEC-www.iec.ch/searchpubLarechercheavancepermetdetrouverdespublicationsIECenutilisantdiffrentscritres(numroderfrence,texte,comitdtudes,).Elledonneaussidesinformationssurlesprojetsetlespublicationsremplacesouretires.IECJustPublished-webstore.iec.ch/justpublishedRestezinformsurlesnouvellespublicationsIEC.JustPublisheddtaillelesnouvellespublicationsparues.Disponibleenligneetaussiunefoisparmoisparemail.ELepremierdictionnaireenlignedetermeslectroniquesetlectriques.Ilcontient20000termesetdfinitionsenanglaisetenfranais,ainsiquelestermesquivalentsdans15languesadditionnelles.EgalementappelVocabulaireElectrotechniqueInternational(IEV)enligne.GlossaireIEC-std.iec.ch/glossary65000entresterminologiqueslectrotechniques,enanglaisetenfranais,extraitesdesarticlesTermesetDfinitionsdespublicationsIECparuesdepuis2002.PluscertainesentresantrieuresextraitesdespublicationsdesCE37,77,86etCISPRdelIEC.ServiceClients-webstore.iec.ch/cscSivousdsireznousdonnerdescommentairessurcettepublicationousivousavezdesquestionscontactez-nous:csciec.ch.INTERNATIONALSTANDARDNORMEINTERNATIONALEIEC60990Edition3.02016-05colourinsideMethodsofmeasurementoftouchcurrentandprotectiveconductorcurrentMthodesdemesureducourantdecontactetducourantdansleconducteurdeprotectionINTERNATIONALELECTROTECHNICALCOMMISSIONCOMMISSIONELECTROTECHNIQUEINTERNATIONALEICS17.220,35.020ISBN978-2-8322-3420-4Warning!Makesurethatyouobtainedthispublicationfromanauthorizeddistributor.Attention!Veuillezvousassurerquevousavezobtenucettepublicationviaundistributeuragr.RegisteredtrademarkoftheInternationalElectrotechnicalCommissionMarquedposedelaCommissionElectrotechniqueInternationale2IEC60990:2016IEC2016CONTENTSFOREWORD.6INTRODUCTION.81234Scope.10Normativereferences.10Termsanddefinitions.11Testsite.114.1Testsiteenvironment.114.2Testtransformer.124.3Earthedneutralconductor.125Measuringequipment.135.1Selectionofmeasuringnetwork.135.1.1General.135.1.2Perceptionandstartle-reaction.145.1.3Letgo-immobilization.145.1.4Electricburn(a.c.).145.1.5Ripple-freed.c.145.2Testelectrodes.155.2.1Construction.155.2.2Connection.155.3Configuration.155.4Powerconnectionsduringtest.155.4.1General.155.4.2EquipmentforuseonlyonTNorTTstarpowerdistributionsystems.195.4.3EquipmentforuseonITpowerdistributionsystemsincludinguneartheddeltasystems.195.4.4Equipmentforuseonsingle-phasecentre-earthedpowersupplysystemsoroncentre-eartheddeltapowersupplysystems.205.5Supplyvoltageandfrequency.205.5.1Supplyvoltage.205.5.2Supplyfrequency.206Testprocedure.206.1General.206.1.1Touchcurrentmeasurements.206.1.2Controlswitches,equipmentandsupplyconditions.216.1.3Useofmeasuringnetworks.216.2Normalandfaultconditionsofequipment.216.2.1Normaloperationofequipment.216.2.2Equipmentandsupplyfaultconditions.217Evaluationofresults.237.1Perception,startle-reactionandletgo-immobilization.237.2Electricburn.238Measurementofprotectiveconductorcurrent.General.23Multipleequipment.24Measuringmethod.24IEC60990:2016IEC20163AnnexA(normative)Equipment.25AnnexB(normative)Useofaconductiveplane.26AnnexC(normative)Incidentallyconnectedparts.27AnnexD(informative)Choiceofcurrentlimits.28D.1General.28D.2Limitexamples.28D.2.1Ventricularfibrillation.28D.2.2Inabilitytoletgo-immobilization.28D.2.3Startle-reaction.28D.2.4Perceptionthreshold.28D.2.5Specialapplications.28D.3Choiceoflimits.29D.4Electricburneffectsoftouchcurrent.30AnnexE(informative)Networksforuseinmeasurementoftouchcurrent.31E.1General.31E.2BodyimpedancenetworkFigure3.31E.3Startle-reaction(andbodyimpedance)networkFigure4.31E.4Letgo-immobilization(andbodyimpedance)networkFigure5.32AnnexF(informative)Measuringnetworklimitationsandconstruction.33AnnexG(informative)Constructionandapplicationoftouchcurrentmeasuringinstruments.35G.1Considerationsforselectionofcomponents.35G.1.1General.35G.1.2PowerratingandinductanceforRSandRB.35G.1.3CapacitorCS.35G.1.4ResistorsR1,R2andR3.36G.1.5CapacitorsC1,C2andC3.36G.2Voltmeter.36G.3Accuracy.36G.4Calibrationandapplicationofmeasuringinstruments.37G.5Records.37G.6Confirmationsystems.37AnnexH(informative)Analysisoffrequencyfilteredtouchcurrentcircuitmeasurements.39AnnexI(informative)ACpowerdistributionsystems(see5.4).47I.1General.47I.2TNpowersystems.48I.3TTpowersystems.50I.4ITpowersystems.51AnnexJ(informative)Routineandperiodictouchcurrenttests,andtestsafterrepairormodificationofmainsoperatedequipment.53AnnexK(normative)Networkperformanceandcalibration.54K.1Networkorinstrumentperformanceandinitialcalibration.54K.2Calibrationinaconfirmationsystem.56K.2.1General.56K.2.2Measurementofinputresistance.56K.2.3Measurementofinstrumentperformance.56Bibliography.594IEC60990:2016IEC2016Figure1Exampleofearthedneutral,directsupply.12Figure2Exampleofearthedneutral,withtransformerforisolation.13Figure3Measuringnetwork,unweightedtouch

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