EN50122-2-1998

CorrigendumtoEN50122-2:1998Englishversion____________Clause1,ScopeInthethirdparagraph,deleteunrelated.Clause2,NormativereferencesDeletethereferencetoEN50162andaddthefollowingnewreferences:EN12954*)Cathodicprotectionsofburiedorimmersedmetallicstructures-GeneralprinciplesIEC60050(826)InternationalElectrotechnicalVocabularyChapter826:Electricalinstallationsofbuildings______________*)inpreparationClause3,DefinitionsDeletethereferencesto[BS7361]indefinitions3.3,3.4.1,3.4.2and3.5.Inthenotein3.3,replaceisconcernedwithbydealswith.In3.4.1,add;polarizeddrainageintheheadinganddeletethenote.In3.4.3,replaced.c.byd.c.source.In3.12,delete,andincertaincasesthefrequency,.In3.13,deletethetextinparenthesesandaddthefollowingnote:NOTE:Thesupplysourcemaybearegeneratingvehicle.In3.18,deleteequalto.In3.29,addAreawhereatthebeginningofthedefinition.In3.30,addAreawhereatthebeginningofthedefinition.EN50122-2:1998/corrigendumAug.2001-2-Clause5,TractionpowersupplysystemIn5.1,replace(see6and7)by(seeclauses6and7).Clause6,TracksystemIn6.1.1.1,replacenotes2and3by:NOTE2:Provisionstoachievethevaluesforrailwaysandmasstransportationsystemsinopenandcloseformationare:-cleanballast;-woodensleepersorconcretesleeperswithinsulatedfasteningsystems;-adequateclearancebetweenrunningrailsandballast;-effectivewaterdrainage.NOTE3:Provisionstoachievetheimproved(lower)valuesforclosedformationsystemsareforinstance:-embeddingtherunningrailsinaninsulatingresinbed;-interposinginsulatinglayersbetweenthetracksandthesupportingstructure.(Subclause6.1.1.4Fourthrailsystems:Amendmentinprogress)Replacethetextof6.1.1.5by:6.1.1.5StraycurrentassessmentsWhenstraycurrentassessmentsaretobemadeoveraperiodoftime,arecognizedmethodshallbeused.AnnexAshowsamethodofdeterminingthevalueofconductanceperunitlength.NOTE:Successivemeasurementsshouldusethesamemethodasusedforthefirstvalueorthereferencevalue.Clause7,InfluencedstructuresInnote3of7.2.3,replacerebarsbyreinforcingbars.Inthesecondparagraphof7.2.4,deletethesecondbe.Numberthenotesof7.2.4tobenote1andnote2.Innotes1and2of7.5,replacecanbymay.Clause8,ProtectionmethodsappliedtometallicstructuresInthethirdsentence,replaceinbyinto.-3-EN50122-2:1998/corrigendumAug.2001AnnexAInthethirdparagraphofthenoteinA.1,replaceathesamebyatthesame.ReplacefigureA.1by:rail1IAIB10mrail2UAon,offUBon,offIonoff10mRUUUUIR10mAonAoffBonBoff()()=−+−Where:RR10misthelongitudinalresistanceofarailsectionof10mofrail1inOhms;rail2accordinglyIistheinjectedcurrent,inAmperesUon,offisthevoltagedropintherail1inVolts,withandwithoutinjectedcurrent;rail2accordinglyFigureA.1:Measurementoftherailresistanceforarailof10mlengthEN50122-2:1998/corrigendumAug.2001-4-ReplacefigureA.2by:TunnelABIIRBIRAL1G´RTxLURTURTAURTBonoff-+′=×−−++GLIIIUUURTRARBRTRTARTB3∆∆∆∆UUU=−onoffWhere:G´RTistheconductanceperunitlengthbetweenrailsandtunnel,inSiemensperkilometreIistheinjectedcurrent,inAmperesIRA,IRBisthecurrentflowingbeyondtheendsA,Bofthemeasuredsection,inAmperesURTisthevoltagebetweentherailandthetunnelatthepointofinjection,inVoltsURTA,URTBisthevoltagebetweentherailandthetunnelattheendsA,Bofthetunnelsection,inVoltsListhelengthofthesectiontobemeasured,inkilometresFigureA.2:MeasuringarrangementfortheconductanceperunitlengthG´RTbetweenrailsandtunnelInA.4,replace“linesectIon”by“tracksection”(sixtimes),anddelete“ofatleast10A”inthesecondline.-5-EN50122-2:1998/corrigendumAug.2001ReplacefigureA.3by:insulatedrailjointL50minsulatedrailjointUREon,off20mICu/CuSO4-electrode+-offon′=×−GLIUUREREonREoff1Where:G´REistheconductanceperunitlengthbetweentrackandearthinSiemensperkilometreIistheinjectedcurrent,inAmperesUREisthevoltagebetweentherailandearth,inVoltsListhelengthofthesectiontobemeasured,inkilometresFigureA.3:DeterminationoftheconductanceperunitlengthG´REfortracksectionsinopenairAnnexBInB.1,replace“EN50162”by“EN12945*)______________*)inpreparationInB.2,attheendofthefirstparagraph,add“AnexampleisgiveninfigureB.1.”andaddthefollowingtitleforfigureB.1:“Polarizedelectricdrainage”.InB.3,attheendofthefirstparagraph,add“AnexampleisgiveninfigureB.2.”andaddthefollowingtitleforfigureB.2:“Forceddrainage”.InB.4,attheendofthefirstparagraph,add“AnexampleisgiveninfigureB.3.”andaddthefollowingtitleforfigureB.3:“Impressedcurrentcathodicprotection”.EN50122-2:1998/corrigendumAug.2001-6-AnnexCReplaceby:AnnexC(informative)EstimationofthelongitudinalvoltageinreinforcedconcreterailwaystructuresThelongitudinalvoltageinreinforcedstructuresoftunnels,viaductsandreinforcedtrackbedscanbeusedfortheassessmentofstraycurrenteffects.Ifthelongitudinalvoltageislessthan0.1V,theconditionsaccordingto7.2.3arematched.Thelongitudinalvoltageinreinforcedrailwaystructures,causedbytrainoperation,dependsonthefollowingaffectingparameters:−lengthoftheconsideredlinesection−lengthoftheadjacentlinesections−conductanceperunitlengthbetweentherunningrailsandthestructure−conductanceperunitlengthbetweenthestructureandearth−longitudinalresistanceoftherunningrails−longitudinalresistanceoftheinterconnectedstructure−tractionreturncurrentoftheconsideredlinesection−tracti