TB3192007CircuitBreakerControlsFailureSurveyonCirc

319CIRCUIT-BREAKERCONTROLSFAILURESURVEYONCIRCUIT-BREAKERCONTROLSSYSTEMSWorkingGroupA3.12April2007CIRCUIT-BREAKERCONTROLSFAILURESURVEYONCIRCUIT-BREAKERCONTROLSSYSTEMSWorkingGroupA3.12MembersandContributorsofWorkingGroupA3.12:HarleyWilson(Convenor),GeorgeCurcanu,HirokiIto,ThierryJung,ThomasKüng,EvaPagän-Diaz,GunvantrayPatel,StanislawPokoraCorrespondingMembers:MarkBlundell,JensBurger,RenéSmeetsCopyright©2007“OwnershipofaCIGREpublication,whetherinpaperformoronelectronicsupportonlyinfersrightofuseforpersonalpurposes.Areprohibited,exceptifexplicitlyagreedbyCIGRE,totalorpartialreproductionofthepublicationforuseotherthanpersonalandtransfertoathirdparty;hencecirculationonanyintranetorothercompanynetworkisforbidden”.Disclaimernotice“CIGREgivesnowarrantyorassuranceaboutthecontentsofthispublication,nordoesitacceptanyresponsibility,astotheaccuracyorexhaustivenessoftheinformation.Allimpliedwarrantiesandconditionsareexcludedtothemaximumextentpermittedbylaw”.N°ISBN:978-2-85873-007-011Introduction..............................................................................................22DataAnalysis...........................................................................................42.1Introduction.......................................................................................42.2FailurebyComponent.......................................................................42.3TimesinceLastMaintenance...........................................................52.4TotalYearsinService.......................................................................73EvaluationofMainSurveyResults,FailureCausesandCorrectiveActions83.1Introduction.......................................................................................83.2TripandCloseCoils..........................................................................93.2.1Possiblecausesoffailure..........................................................93.2.2Surveyresults..........................................................................103.2.3Possibleimprovements............................................................113.3WiringandJoints.............................................................................123.3.1Possiblefailurecauses............................................................123.3.2SurveyResults.........................................................................133.3.3PossibleImprovements............................................................143.4AuxiliarySwitches...........................................................................143.4.1Possiblefailurecauses............................................................143.4.2Surveyresults:.........................................................................153.4.3Possibleimprovements:...........................................................163.5Relays.............................................................................................173.5.1Possiblecausesoffailure........................................................173.5.2Surveyresults..........................................................................173.5.3Possibleimprovements:...........................................................183.6EnergySensors..............................................................................193.6.1Possiblecausesoffailure........................................................193.6.2Surveyresults..........................................................................193.6.3Possibleimprovements............................................................213.7DensityMonitoringSystem(includingpiping).................................213.7.1Possiblecausesoffailure........................................................213.7.2Surveyresults..........................................................................223.7.3Possibleimprovements............................................................224PotentialUseofDigitalControls.............................................................244.1Whataretheuser’sexpectations?..................................................244.2Whatisinstalledtoday?..................................................................274.2.1Additionalfunctionalitywithconventionaltechnology...............284.2.2Replacementofconventionaltechnology................................291.Digitalcircuitbreakercontrolwithaconventionalcopperwiredinterface292.Digitalcircuitbreakercontrolwithvendorspecificinterfaces.................293.Integratedmonitoringandcontrolsolutions(fromthecircuitbreakertothecontrolroomormaintenanceoffice)..............................................................294.3Expecteddevelopmentsinthenearfuture......................................334.3.1Useofexistingdrivetechnologies............................................334.3.2Changesindrivetechnologies.................................................354.4Limitationsandproblemsremainingtobeaddressed.....................365Summaryandconclusions...............................