ITU-T-K.45-200804

InternationalTelecommunicationUnionITU-TK.45TELECOMMUNICATIONSTANDARDIZATIONSECTOROFITU(04/2008)SERIESK:PROTECTIONAGAINSTINTERFERENCEResistibilityoftelecommunicationequipmentinstalledintheaccessandtrunknetworkstoovervoltagesandovercurrentsRecommendationITU-TK.45Rec.ITU-TK.45(04/2008)iRecommendationITU-TK.45ResistibilityoftelecommunicationequipmentinstalledintheaccessandtrunknetworkstoovervoltagesandovercurrentsSummaryRecommendationITU-TK.45specifiesresistibilityrequirementsandtestproceduresfortelecommunicationequipmentinstalledbetweentelecommunicationcentresandbetweenatelecommunicationcentreandcustomer'spremisesbuilding.OvervoltagesorovercurrentscoveredbythisRecommendationincludesurgesduetolightningonornearthelineplant,short-terminductionfromadjacenta.c.powerlinesorrailwaysystems,earthpotentialriseduetopowerfaults,directcontactbetweentelecommunicationlinesandpowerlinesandelectrostaticdischarges.Majorchangescomparedwiththe2003versionofthisRecommendationinclude:•removingthepowerinductiontestrequirementforantennaportswheretheinstallationiswithinthescopeofRecommendationITU-TK.71.SourceRecommendationITU-TK.45wasapprovedon13April2008byITU-TStudyGroup5(2005-2008)underRecommendationITU-TA.8procedure.iiRec.ITU-TK.45(04/2008)FOREWORDTheInternationalTelecommunicationUnion(ITU)istheUnitedNationsspecializedagencyinthefieldoftelecommunications,informationandcommunicationtechnologies(ICTs).TheITUTelecommunicationStandardizationSector(ITU-T)isapermanentorganofITU.ITU-Tisresponsibleforstudyingtechnical,operatingandtariffquestionsandissuingRecommendationsonthemwithaviewtostandardizingtelecommunicationsonaworldwidebasis.TheWorldTelecommunicationStandardizationAssembly(WTSA),whichmeetseveryfouryears,establishesthetopicsforstudybytheITU-Tstudygroupswhich,inturn,produceRecommendationsonthesetopics.TheapprovalofITU-TRecommendationsiscoveredbytheprocedurelaiddowninWTSAResolution1.InsomeareasofinformationtechnologywhichfallwithinITU-T'spurview,thenecessarystandardsarepreparedonacollaborativebasiswithISOandIEC.NOTEInthisRecommendation,theexpressionAdministrationisusedforconcisenesstoindicatebothatelecommunicationadministrationandarecognizedoperatingagency.CompliancewiththisRecommendationisvoluntary.However,theRecommendationmaycontaincertainmandatoryprovisions(toensuree.g.interoperabilityorapplicability)andcompliancewiththeRecommendationisachievedwhenallofthesemandatoryprovisionsaremet.Thewordsshallorsomeotherobligatorylanguagesuchasmustandthenegativeequivalentsareusedtoexpressrequirements.TheuseofsuchwordsdoesnotsuggestthatcompliancewiththeRecommendationisrequiredofanyparty.INTELLECTUALPROPERTYRIGHTSITUdrawsattentiontothepossibilitythatthepracticeorimplementationofthisRecommendationmayinvolvetheuseofaclaimedIntellectualPropertyRight.ITUtakesnopositionconcerningtheevidence,validityorapplicabilityofclaimedIntellectualPropertyRights,whetherassertedbyITUmembersorothersoutsideoftheRecommendationdevelopmentprocess.AsofthedateofapprovalofthisRecommendation,ITUhadnotreceivednoticeofintellectualproperty,protectedbypatents,whichmayberequiredtoimplementthisRecommendation.However,implementersarecautionedthatthismaynotrepresentthelatestinformationandarethereforestronglyurgedtoconsulttheTSBpatentdatabaseat©ITU2009Allrightsreserved.Nopartofthispublicationmaybereproduced,byanymeanswhatsoever,withoutthepriorwrittenpermissionofITU.Rec.ITU-TK.45(04/2008)iiiCONTENTSPage1Scope............................................................................................................................12References.....................................................................................................................13Definitionsandabbreviations.......................................................................................14Tests..............................................................................................................................1Bibliography.............................................................................................................................14Rec.ITU-TK.45(04/2008)1RecommendationITU-TK.45Resistibilityoftelecommunicationequipmentinstalledintheaccessandtrunknetworkstoovervoltagesandovercurrents1ScopeThisRecommendationspecifiesresistibilityrequirementsandtestproceduresfortelecommunicationequipmentinstalledbetweentelecommunicationcentresandbetweenatelecommunicationcentreandcustomer'spremisesbuilding.Equipmentwhichisattachedtoorinstalledwithinthecustomer'spremisesbuildingisoutsidethescopeofthisRecommendation.Basic[ITU-TK.44](testmethodsandtestcircuits)isanintegralpartofthisRecommendation.Itshouldbereadinconjunctionwith[ITU-TK.11]and[ITU-TK.39](technicalandgeneraleconomicaspectsofprotection).2ReferencesThefollowingITU-TRecommendationsandotherreferencescontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthisRecommendation.Atthetimeofpublication,theeditionsindicatedwerevalid.AllRecommendationsandotherreferencesaresubjecttorevision;usersofthisRecomme