81/224/INFForIECuseonly2003-07-25INTERNATIONALELECTROTECHNICALCOMMISSIONTECHNICALCOMMITTEENo.81:LIGHTNINGPROTECTIONTC81/WG3–Convenor’sreport(tobediscussedunderdraftagendaitem6attheforthcomingTC81meetingtobeheldinPalmadeMallorca29thand30thSeptember2003)Developmentofthenewdraftfor62305-4distributedas81/212/CDGeneralremarksWG3stated,thatthe“LightningProtectionZoneConcept”protectingagainstLEMPisthebasisforsystemsprotectingstructurescontainingelectricalandelectronicsystems.ThethreatduetoLEMPdoesinclude:Flashesdirectornearbytostructuresaswellastoincominglinesresultingin(partial)lightningcurrents,inducedorconductedsurgesand(electro-)magneticfields.ThereforetheprotectionmeasurestobeconsideredinIEC62305-4are:•Earthingandbonding(includingexternalLPSorexternalspatialshieldLPZ1,earthterminationsystemandameshedbondingnetwork)•magneticshieldingandlinerouting(including:spatialshielding,shieldingofinternallines,routingofinternallines,shieldingofexternallines)•surgeprotectivedevicesystems.WG3discussedandpointedout,thatforallpartsofIEC62305itisnecessarytocoordinatetheircontent.Especiallythe“Riskstandard”(IEC62305-2)mustbeextendedtohandleandvalidateeveryprotectionmeasure,definedinthe“protectionstandards”(IEC62305-3,-4,-5),especiallythoseinIEC62305-4.Timetable2002-10-23IntheWG3meetinginBeijing,thetheactualWG3draftwasdiscussedconsideringalsotwootherdraftsofsecretary.FurtherthecommentsofNCsto81/191/NPaslistedin81/201/RVNwerediscussed.WG3askedtheconvenortoprepareanewdraftofIEC62305-4includingallthedecisionsmadeintheWG3meeting.2002-11-01Thesecretarysentaproposalfornextdrafttoconvenor2002-12-19TheconvenorelaboratedanewWG3draftbasedonthedecisionsofWG3andsentittothesecretaryforagreement.2003-01-02Thesecretaryelaboratedacompletelyredraftedversionandsentittotheconvenor.2003-02-09WG3decidedinagreementwiththesecretary,toasktheconvenortopreparenextdraftbasedontheWG3versionfrom2002-12-19,butintegratingallcommentsofWG3membersandasfaraspossiblethesuggestionsofthesecretary.–2–81/224/INF2003-02-28TheconvenorsentthenewWG3drafttobepublishedasCDtogetherwithallcollectedcomments(showingabroadcommonagreementinWG3)tothesecretaryandtoallWG3members.2003-03-10ThesecretaryrevisedtheWG3versioneditoriallyandtechnicallyandsentittoCOforpublication.2003-03-14TheCOpublished81/212/CD(IEC62305-4)2003-06-20Closingdateforcommentson81/212/CDMeetingsofWG3sincelastconvenorsreport2002-10-23MeetingofWG3heldinBeijingtoprepare81/122/CD.Nextmeetingis:2003-07-14MeetingofWG3scheduledinRometodiscusstheNCcommentson81/212/CDtobeintegratedinthefutureCDVofIEC62305-4.______________________
