ISO／DIS 22074-5：2020.docx

DRAFTINTERNATIONA1STANDARDISO/DIS22074-5ISOTC269/SC1Votingbeginson:2023-10-05Secretariat:AFNORVotingterminateson:2023-12-28Rai1wayinfrastructureRai1fasteningsystems一Part5:Testmethodfore1ectrica1resistanceInfrastructureJerroviaire-Systdmesdefixationdurai1一Partie5:Mdthoded'essaipourIadeterminationderesistance1ectriqueICS:45.080THISDOCUMENTISADRAFTCIRCU1ATEDFORCOMMENTANDAPPROVA1.ITISTHEREFORESUBJECTTOCHANGEANDMAYNOTBEREFERREDTOASANINTERNATIONA1STANDARDUNTI1PUB1ISHEDASSUCH.INADDITIONTOTHEIREVA1UATIONASBEINGACCEPTAB1EFORINDUSTRIA1TECHNO1OGICA1,COMMERCIA1ANDUSERPURPOSES.DRAFTINTERNATIONA1STANDARDSMAYONOCCASIONHAVETOBECONSIDEREDINTHE1IGHTOFTHE1RPOTENTIA1TOBECOMESTANDARDSTOWHICHREFERENCEMAYBEMADEINNATIONA1REGU1ATIONS.RECIPIENTSOFTHISDRAFTAREINVITEDTOSUBMIT.WITHTHEIRCOMMENTS.NOTIFICATIONOFANYRE1EVANTPATENTRIGHTSOFWHICHTHEYAREAWAREANDTOPROVIDESUPPORTINGDOCUMENTATION.Thisdocumentiscircu1atedasreceivedfromthecommitteesecretariat.ISO/CENPARA11E1PROCESSINGReferencenumberISO/DIS22074-5:2023(E)COPYRIGHTPROTECTEDDOCUMENT©ISO2023A11rightsreserved.Un1essotherwisespecified,orrequiredinthecontextofitsimp1ementation,nopartofthispub1icationmaybereproducedoruti1izedotherwiseinanyformorbyanymeans,e1ectronicormechanica1,inc1udingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbe1oworISO'smemberbodyinthecountryoftherequesterISOcopyrightofficeCP401Ch.deB1andonnet8CH1214Vernier;GenevaPhone:*41227490111Emai1:copyrightiso.orgWebsite:www.iso.orgPub1ishedinSwitzer1andPageContentsIntrodUCt1OnScopeNormativereferences3Termsanddefinitions,symbo1sandabbreviations132501sandabbr，viatin、45Princip1e-25:PRai1252Vater25.2.1Standard"wet,'conditions25.6Wstcrco11ection3drcyc1ingequipment367891011Testspecimens(referencemethod)3Testspecimens-A1ternativemethod5*st6ForewordISO(theInternationa1OrganizationforStandardization)isawor1dwidefederationofnationa1standardsbodies(ISOmemberbodies).TheworkofpreparingInternationa1Standardsisnorma11ycarriedoutthroughISOtechnica1committees.Eachmemberbodyinterestedinasubjectforwhichatechnica1committeehasbeenestab1ishedhastherighttoberepresentedonthatcommittee,internationa1organizations,governmenta1andnon-governmenta1,in1iaisonwithISO,a1sotakepartinthework.ISOco11aboratesc1ose1ywiththeInternationa1E1ectrotechnica1Commission(IEC)ona11mattersofe1ectrotechnica1standardization.Theproceduresusedtodeve1opthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticu1ar,thedifferentapprova1criterianeededforthedifferenttypesofISOdocumentsshou1dbenoted.Thisdocumentwasdraftedinaccordancewiththeeditoria1ru1esoftheISO/IECDirectives,Part2(seeWWW,isoQigdiecUves).Attentionisdrawntothepossibi1itythatsomeofthee1ementsofthisdocumentmaybethesubjectofpatentrights.ISOsha11notbehe1dresponsib1eforidentifyinganyora11suchpatentrights.Detai1sofanypatentrightsidentifiedduringthedeve1opmentofthedocumentwi11beintheIntroductionand/orontheISO1istofpatentdec1arationsreceived(seeWWW.iso.org/patents).Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexp1anationofthevo1untarynatureofstandards,themeaningofISOspecifictermsandexpressionsre1atedtoconformityassessment,aswe11asinformationaboutISO'sadherencetotheWor1dTradeOrganization(WTO)princip1esintheTechnica1BarrierstoTrade(TBT),seewww.iso.org/iso/foreword.htm1.ThisdocumentwaspreparedbyTechnica1CommitteeISO/TC269,Rai1wayapp1ications,SubcommitteeSC01,Infrastructure.A1istofa11partsintheISO22074seriescanbefoundontheISOwebsite.Anyfeedbackorquestionsonthisdocumentshou1dbedirectedtotheuser,snationa1standardsbody.Acomp1ete1istingofthesebodiescanbefoundatWWWjSo.org/members.htm1IntroductionThistestprocedureisusedtoassesstherai1-to-rai1e1ectrica1resistancere1evanttorai1fasteningsusedin1ocationswheretrackcircuitsigna11ingsystemsareused.Rai1wayinfrastructureRai1fasteningsystems一Part5:Testmethodfore1ectrica1resistance1 ScopeThisdocumentspecifiesa1aboratorytestprocedurefordeterminingthee1ectrica1resistance,inwetconditions,betweentherunningrai1sprovidedbyafasteningsystemfittedtoastee1orconcretes1eeper,bearerore1ementOfba11ast1esstrack.Itisa1soapp1icab1etoembeddedrai1.Thistestprocedureapp1iestoacomp1etefasteningassemb1y.Itisre1evanttosigna11ingcurrents,nottotractioncurrents.Areferenceprocedureandana1ternativeprocedureareinc1uded.2 NormativereferencesThefo11owingdocuments,inwho1eorinpart,arenormative1yreferencedinthisdocumentandareindispensab1eforitsapp1ication.Fordatedreferences,on1ytheeditioncitedapp1ies.Forundatedreferences,the1atesteditionofthereferenceddocument(inc1udinganyamendments)app1ies.ISO7888,Waterqua1ityDeterminationofe1ectrica1conductivityISO22074-1,Rai1wayapp1icationsInfrastructureRai1fasteningsystemsPart1:Definitions3 Termsanddefinitions,symbo1sanda