81/254/INFForIECuseonly2004-09-03INTERNATIONALELECTROTECHNICALCOMMISSIONTECHNICALCOMMITTEENo.81:LIGHTNINGPROTECTIONREPORTOFCONVENOROfIECTC81/WG10(tobediscussedunderdraftagendaitem9atforthcomingTC81meetingtobeheldinSeoul20thand21stOctober2004)1.GeneralThetaskofWG10istoprepareIEC62305-5,whichdealswiththe"Lightningprotectionofservices.2.DateandplaceofmeetingsSincethelastmeetingofIECheldinPalmadeMallorcaonSeptember2003WG10meton:•14/15October2003inStockholm,Sweden•21/22April2004inFrankfurt,GermanyRegardingthemembershipofWG10itcanbenoticedthatthereisnowsomeexpertsfromPowerCompaniesbutnobodyforPipelines.Furthermeetingisscheduledfor:18/19October2004inSeoul(Korea)3.StatusofworkThelastmeetingsofWG10weremainlydevotedtofinalizethepartsofIEC62305-5dealingwiththeprotectionoftelecommunicationslinesandpowerlinesonthebasisoftheconsiderationofthecommentsrelatedtotheIEC62305-5circulatedas81/220/NP.Bylackofexpertsandcontributionsthepartrelatedtopipelinesisalwaysunderstudy.RegardingtheriskassessmentforservicesinIEC62305-2,WG10hasproducedcontributionstoWG9throughtheConvenorandtheSecretary.3.1RemarksonIEC62305-2CommentsandamendmentsofIEC62305-2weresubmittedtotheconvenorofWG9tohaveIEC6235-5inlinewiththepreviousIEC61663-2andtheRecommendationK46ofITU-T.Themajorspointsconcerns:•AdditionofnotestatingthatInformationonsectiontobeconsideredandthenotionoftransitionpointwereintroducedinIEC6230565•AmendmentofTableB.7relatedtoshieldingfactorandadditionofanotestatingthatmorepreciseevaluationofPLIcanbefoundinIEC62305-5andITURecommendationK46.•AdditionoftheconceptthattheriskcomponentR’zshouldbeevaluatedforeachtransitionpointbetweentwosections.3.2WorkonIEC62305-5:Lightningprotection-ProtectionofservicesThelastdraftofIEC62305-5waspreparedbyaddingtheinformationneededonportioningofaserviceandtheprotectivemeasuresofpowerlinesbasedonthecollectionofpracticesindifferentcountries.Thefollowingpointswereconsidered:•Additionofsectiondealingwiththeneedofprotectionatthetransitionpoints.TheriskcomponentR’zd...
