ITU-T K.66 (12 2004) (英) Protection of customer premises from overvoltages

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1、INTERNATIONALTELECOMMUNICATIONUNIONITU-TK.66TELECOMMUNICATION(12/2004)STANDARDIZATIONSECTOROFITUSERIESK:PROTECTIONAGAINSTINTERFERENCEProtectionofcustomerpremisesfromovervoltagesITU-TRecommendationK.66ITU-TRecommendationK.66ProtectionofcustomerpremisesfromovervoltagesSummaryThisRecommend

2、ation:•providesrecommendationsforbondingandearthingoftelecommunicationequipmentinresidentialandcommercialcustomerpremises;•referstoITU-TRec.K.21forequipmentresistibilityrequirements;•recommendsearthingandbondingrequirementstocoordinatewiththeresistibilityrequirementsofITU-TRec.K.21andth

3、esafetyrequirementsofIEC60950-1;•recommendstheinstallationpracticesforbondingofallservicesandtheinstallationofSPDs;•illustratesproblemsassociatedwithearthingandbondingandprovidessolutionsfortheseearthingandbondingproblems.Theseinclude:1)methodstoimprovetheearthingandbonding;2)methodsofp

4、rovidingadditionalprotectionexternaltotheequipment;3)specialresistibilityandsafetyrequirements;•recommendsresponsibilitiesforprotectionatcustomerpremises;•referstodraftIEC62305-3forprotectionagainstdirectlightning.SourceITU-TRecommendationK.66wasapprovedon14December2004byITU-TStudyGroup

5、5(2005-2008)undertheITU-TRecommendationA.8procedure.ITU-TRec.K.66(12/2004)iFOREWORDTheInternationalTelecommunicationUnion(ITU)istheUnitedNationsspecializedagencyinthefieldoftelecommunications.TheITUTelecommunicationStandardizationSector(ITU-T)isapermanentorganofITU.ITU-Tisresponsiblefor

6、studyingtechnical,operatingandtariffquestionsandissuingRecommendationsonthemwithaviewtostandardizingtelecommunicationsonaworldwidebasis.TheWorldTelecommunicationStandardizationAssembly(WTSA),whichmeetseveryfouryears,establishesthetopicsforstudybytheITU-Tstudygroupswhich,inturn,produceRe

7、commendationsonthesetopics.TheapprovalofITU-TRecommendationsiscoveredbytheprocedurelaiddowninWTSAResolution1.InsomeareasofinformationtechnologywhichfallwithinITU-T'spurview,thenecessarystandardsarepreparedonacollaborativebasiswithISOandIEC.NOTEInthisRecommendation,theexpression