EN 50306-3-2020 铁路应用 具有特殊防火性能的铁路车辆电缆 薄壁 第3部分：单芯和多芯电缆（成对 三重和四边形）屏蔽和薄壁护套

EUROPEANSTANDARDNORMEEUROPÉENNEEUROPÄISCHENORMMarch2020ICS13.220.40;29.060.20;45.060.01SupersedesEN50306-3:2002andallofitsamendmentsandcorrigenda(ifany)EnglishVersionRailwayapplications-Railwayrollingstockcableshavingspecialfireperformance-Thinwall-Part3:SinglecoreandmulticorecablesscreenedandthinwallsheathedApplicationsferroviaires-Cablespourmatérielroulantferroviaireayantdesperformancesparticulièresdecomportementaufeu-Isolationmince-Partie3:Cablesmonoconducteursetmulticonducteursblindésavecgained'épaisseurminceBahnanwendungen-KabelundLeitungenfürSchienenfahrzeugemitverbessertemVerhaltenimmehradrigeKabelundmehradrigeKabelundLeitungengeschirmtmitreduziertenMantelwanddickenThisEuropeanStandardwasapprovedbyCENELECon2019-12-30.CENELECmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENELECmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENELECmemberintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthesamestatusastheofficialversions.CENELECmembersarethenationalelectrotechnicalcommitteesofAustria,Belgium,Bulgaria,Croatia,Cyprus,theCzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,lceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,theNetherlands,Norway,Poland,Portugal,RepublicTurkeyandtheUnitedKingdom.EuropeanComitéofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,CommitteeforElectrotechnicalStandardizationEuropeendeNormalisationElectrotechniqueEuropäischesKomiteefürElektrotechnischeNormungCEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussels◎2020CENELECllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENELECMembers.Ref.No.EN50306-3:2020E2ContentsPage 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17Europeanforeword4rEN50306-3:2020(E)5Thisdocumentspecifiesrequirementsfor,andconstructionsanddimensionsof,multicorecables,ratedvoltageUo/U=300/500V,ofthefollowingtype:Screened(0,5mm²to2,5mm²,numberofcoresfrom1to8).Allcableshavestrandedtinnedcopperconductors,andthinwallthickness,halogen-free,insulationandsheath.Theyareforuseinrailwayrollingstockasfixedwiringorwiringwherelimitedflexinginoperationisencountered.Thesecablesareratedforoccasionalthermalstressescausingageingequivalenttocontinuousoperationallifeatatemperatureof90℃.Forstandardcables,thisisdeterminedbytheacceptancetestdefinedinEN50305,usingacceleratedlong-term(5000h)thermalageingindicatinga110°℃/20000htemperatureindex.Ifthecustomerweretorequirelifetimepredictionsthiswouldbedemonstratedbasedonthetemperatureindexoftheproductassuppliedbythemanufacturer.Themaximumtemperatureforshortcircuitconditionsis160℃basedondurationof5s.Underfireconditions,thecablesexhibitspecialperformancecharacteristicsinrespectofmaximumpermissibleflamepropagation(flamespread)andmaximumpermissibleemissionofsmokeandtoxicgases.TheserequirementsarespecifiedtopermitthecablestosatisfyHazardLevel3ofEN45545-1andEN45545-2.EN50306-3:2020isexpectedtobeusedinconjunctionwithEN50306-1:2020,GeneralRequirements,andEN50306-2:2020,Singlecorecables.2NormativereferencesThefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.EN45545-1,Railwayapplications-Fireprotectiononrailwayvehicles-Part1:GeneralEN60332-1-2,Testsonelectricandopticalfibrecablesunderfireconditions-Part1-2:Testforverticalflamepropagationforasingleinsulatedwireorcable-Procedurefor1kWpre-mixedflameEN61034-2,Measurementofsmokedensityofcablesburningunderdefinedconditions-Part2:TestprocedureandrequirementsEN50305:2020,Railwayapplications-Railwayrollingstockcableshavingspecialfireperformance-TestmethodsEN50306-1:2020,Railwayapplications-Railwayrollingstockcableshavingspecialfireperformance-Thinwall-Part1:GeneralrequirementsEN50306-2:2020,Railwayapplications-Railwayrollingstockcableshavingspecialfireperformance-Thinwall-Part2:SinglecorecablesEN60811(allparts),Electricandopticalfibrecables-Testmethodsfornon-metallicmaterialsEN62230,Electriccables-Spark-testmethod3TermsanddefinitionsNotermsanddefinitionsarelistedinthisdocument.ISOandIECmaintainterminologicaldatabasesforuseinstandardizationatthefollowingaddresses:EN50306-3:2020(E)6一ISOOnlinebrowsingplatform:availableat/obp一IECElectropedia:availableat/4.1GeneralThecompletedcableshallconformtotheapplicablegeneralrequirementsgiveninEN50306-1:2020andtothespecificrequirementsofthisPart3.ConformitywiththerequirementsshallbecheckedbyinspectionandbythetestsgiveninTable2.4.2Markingandcodedesignation4.2.1MarkingofcableCablesshallbemarkedwiththefollowing:—Manufacturer'sname;—ENreference;—Voltagerating(Uo);一Conductorsize;一Acodedesignationaccordingforuseofthecable(see4.2.2);一Screening(S);一ConductortemperatureratingForexample:XYZEN50306-3300V1x1,5MMS90ThemarkingshallconformtotherequirementsofEN50306-1:2020,ClauseCodeDesignationThefollowinglettersshallbeusedasacodetoidentifythesuitabilityofaparticularcableforuseunderoneoftheHazardLevelsofEN45545-1,andtoindicateperformancelevelsrelatingtolowtemperatureandtooilandfuelresistance:HazardLevelEN45545-1HL3一lowtemperature/oilresistanceC一extralowtemperature/oilresistanceF一lowtemperature/extraoilandfuelresistanceJ一extralowtemperature/extraoilandfuelresistanceMForsheathedcablestwolettersarerequired,onefortheinsulationandoneforthesheath.7EN50306-3:2020(E)4.2.3MarkingontheinsulationofcoresformulticorecablesThecoresshallbemarked1,2,etc.inaccordancewiththerequirementsgiveninEN50306-2:2020,4.2.1.However,thecorenumber1maybemarkedastherelevantsinglecoreinaccordancewiththerequirementsofEN50306-2:2020,4.3.1.DurabilityofmarkingshallbeinaccordancewithEN50305:2020,RatedvoltageTheratedvoltagerecognizedforthepurposesofthisdocumentshallbeUo/U=300V/500V4.4Construction4.4.1CoresEachinsulatedsinglecoreshallconformtotherequirementsgiveninEN50306-2:20Laying-upofcoresinmulticorecablesThecoresofmulticorecablesshallbetwistedtogether.Thepitchoflayforthecoresshallnotbegreaterthan20timesthediameterofthelaid-upcoresinthecable.4.4.3MetallicbraidscreeningThebraidshallconsistoftinned,annealedcopperwires.Thereshallbenomorethanonespliceinanyspindleofthebraidoverany100mmlengthofthebraid.Thebraidshallbeappliedevenly,anditshouldneitherslipnorleaveanimprintontheinsulation.ThefillingfactorKrshallbeaccordingtotheformula:Thewiresofthebraidshallbegreaterthanorequalto0,10mmdiameter.ThefillingfactorKrshallbe0,55minimum.Thelayangle(theangleofabraidwireandthecentrelineofthecable)shallbebetween15°and35°,andshallbecheckedbyapplicationofthefollowingformula:whereφ=diameterunderthebraid+2dd=nominaldiameterofawirem=totalnumberofspindlesn=numberofwiresperspindleL=braidingpitchEN50306-3:2020(E)84.4.4SheathThesheathshallbeS2asdefinedinEN50306-1:2020andshallmeettherequirementsspecifiedinTable1ofthatEN.Thesheathshallbeappliedbyextrusion.ThesheaththicknessshallconformtothespecifiedvaluegiveninTable1below.Thesheathcolourshallbeblackunlessotherwisespecified.Table1—Requirementsforconstructionofcables-screenedandsheathedNumberofcoresandnominalcross-mm²MinimumthicknesspointmmOveralldiameterrmmmin.max.0,202,32,92×0,50,204,43×0,50,204,74×0,50,204,06×0,50,206,58×0,50,206,17,10,202,53,12×0,750,204,83×0,750,204,04×0,750,204,56×0,750,206,17,18×0,750,208,30,202,72×10,204,23×10,204,54×10,206,26×10,206,38×10,208,50,203,12×1,50,205,16,23×1,50,206,64×1,50,206,06×1,50,208,38×1,50,208,59,50,204,52×2,50,206,43×2,50,206,88,04×2,50,208,79EN50306-3:2020(E)Forothercompositions(numberofcores),sheaththicknessesshallfollowinprinciplethevaluementionedintheTable1oraskthemanufacturerforadequatetechnicaldesigndependingontheapplicationrequirements.ThecablemarkingshallkeepthestandardnameasEN50306-3:2020.ThedefinitionofType(T),Sample(S)andRoutine(R)testsisasgiveninEN50306-1:2020,Clause3.ThevoltagetestshallbecarriedoutinaccordancewithEN50305:2020,6.2.2(a),usingeitheranACorDCvoltageandthefollowingconditions:一samplelength20m一voltage(AC)2kV一voltage(DC)4,8kV一durationofapplication5min一testtemperature(20±5)℃Attheconclusionofthetestthereshallbenobreakdownoftheinsulation.ThetestshallbecarriedoutinaccordancewithEN50305:202020,6.3,usingeitheranACorDCvoltageandthefollowingconditions:一samplelength5m一voltage(AC)2kV一voltage(DC)4,8kV一durationofapplication5min一testtemperature(20±5)℃Attheconclusionofthetestthereshallbenobreakdownofthesheath.5.4SparktestonthesheathThetestshallbecarriedoutinaccordancewithEN50305:2020,6.5,andEN62230,usingoneofthefollowingconditions:一AC(50Hz)3,0kV一impulse8,0kV—DC4,5kVEN50306-3:2020(E)一Highfrequency4,5kVThereshallbenobreakdownofthesheath.5.5WaterabsorptionofsheathThetestshallbecarriedoutonthecompletecableinaccordancewithEN50305:2020,8.3,usingthefollowingconditions:一samplelength3m一watertemperature(70±2)℃一immersionduration168hAttheendoftheimmersionperiodaDCvoltageof300Vshallbeappliedbetweenthemetallicscreenandthewaterforaperiodof1min.Thereshallbenobreakdownofthesheath.5.6HotsettestofsheathThetestshallbecarriedoutinaccordancewithEN60811-507,usingthefollowingconditions:一temperature(200±3)℃一timeunderload15min一mechanicalstress20N/cm²Themaximumelongationshallbe一100%-underload,一25%-afterunloading.5.7AgeingtestofsheathTheageingtestshallbecarriedoutinaccordancewithofEN60811-401:2012andEN60811-401:2012/A1:2017,usingthefollowingconditions:Treatmenton5mofcompletecable:一temperature(120±2)℃一duration240hVoltagetestafterageinginaccordancewithEN50305:2020,6.3;一49Hzto61HzAttheconclusionofthetestthereshallbenobreakdownofthesheath.5.8MineraloilresistanceofsheathThetestshallbecarriedoutinaccordancewithEN50305:2020,8.1,usingthefollowingconditions:treatment:一typeofoilIRM902EN50306-3:2020(E)一temperature(100±2)℃一duration24htestaftertreatment一49Hzto61Hz一duration1minAttheconclusionofthetestthereshallbenobreakdownofthesheath.ThetestshallbecarriedoutinaccordancewithEN50305:2020,8.1,usingthefollowingconditions:treatment:一typeoffluidIRM903一temperature(70±2)℃testaftertreatment一49Hzto61HzAttheconclusionofthetestthereshallbenobreakdownofthesheath.5.10AcidandalkaliresistanceofsheathThetestshallbecarriedoutinaccordancewithEN50305:2020,8.2,usingthefollowingconditions:treatment一typeofacidbath:N-Oxalicacidsolution一typeofalkalibath:N-Sodiumhydroxidesolution一temperature(23±2)℃testconditionsaftertreatment一49Hzto61HzAttheconclusionofthetestthereshallbenobreakdownofthesheath.EN50306-3:2020(E)Twoseparatetestsarerequired;oneinacidsolutionandoneinalkalisolution.5.11PressuretestathightemperatureThetestshallbecarriedoutinaccordancewithEN50305:2020,7.5,usingthefollowingconditions:—temperature(125±2)℃testaftertreatment一49Attheconclusionofthetestthereshallbenobreakdownofthesheath.5.12DynamiccutthroughThetestshallbecarriedoutonthesheathatatemperatureof(20±2)℃andinaccordancewithEN50305:2020,5.6.Theloadingonthecuttingedgeshallbeincreasedataconstantrateof1N/s.Themeanvalue,fromthefourmeasurements,oftheloadrequiredtocutthroughtothescreenshallbegreaterthanorequalto50N,withaminimumof30Nforanyindividualmeasurement.5.13NotchpropagationofsheathThetestshallbecarriedoutinaccordancewithEN50305:2020,5.3.Attheconclusionofthetestthereshallbenobreakdownofthesheath.5.14BendingtestatlowtemperatureThetestshallbecarriedoutat(-40±2)℃inaccordancewithEN60811-504.Attheconclusionofthetestthereshallbenocracksinthesheath.5.15AbrasionresistanceofsheathThetestshallbecarriedoutinaccordancewithEN50305:2020,5.2.Allcablesirrespectiveoftheirdiametershallbetestedwiththeneedle.Theloadontheneedleshallbe8N.Themeannumberofcyclesfromthefourmeasurementsshallbegreaterthanorequalto150,withaminimumof100cyclesforanyindividualmeasurement.5.16OzoneresistanceThetestshallbecarriedoutinaccordancewithEN50305:2020,7.4.1,usingeitherMethodAorMethodB,asgivenbelow.ThechoiceoftestMethodAorMethodBmaybemadebythesupplier.MethodA:concentration(%)(250to300)×10-4EN50306-3:2020(E)testtemperature(25±2)℃testduration24htestaftertreatmenttestrequirementnocracksorbreakdownMethodB:concentration(%)(200±50)×10-6testtemperature(40±2)℃relativehumidity(%)55±5testduration72htestaftertreatment49Hzto61Hztestrequirementnocracksorbreakdown5.17StresscrackingtestThetestshallbecarriedoutinaccordancewithEN50305:2020,7.7.Attheconclusionoftheageingperiodthereshallbenocracksinthesheath,eitherbeforeoraftertheunwindingorbendingprocedure.Thereshallbenobreakdownoftheinsulationorthesheathinthesubsequentvoltagewithstandtest.5.18FireperformancetestsThecompletedcableshallconformtotherequirementsgiveninEN50306-1:2020,8.1,8.2.2or8.2.3(dependinguponoveralldiameter)and8.3.ThesheathshallconformtotherequirementsofEN50306-1:2020,Clause9.EN50306-3:2020(E)Table2—ScheduleoftestsforthinwallsheathedcablesRefNoTestCategoryTestmethENRequirements12ElectricaltestsElectricalresistanceofconductorsVoltagetestoncompletecableVoltagetesto