ITU-T K.34 (07 2003) (英) Classification of electro

INTERNATIONALTELECOMMUNICATIONUNIONITU-TK.34TELECOMMUNICATIONSTANDARDIZATIONSECTOROFITU(07/2003)SERIESK:PROTECTIONAGAINSTINTERFERENCEClassificationofelectromagneticenvironmentalconditionsfortelecommunicationequipment–BasicEMCRecommendationITU-TRecommendationK.34ITU-TRec.K.34(07/2003)iITU-TRecommendationK.34Classificationofelectromagneticenvironmentalconditionsfortelecommunicationequipment–BasicEMCRecommendationSummaryThisRecommendationdefineselectromagneticenvironmentalclassesfortelecommunicationequipmentcoveringallrelevantelectromagneticenvironmentalparameters.ThisRecommendationappliestotelecommunicationequipmentinstalledintelecommunicationcentres,outdoorlocationsandcustomerpremises.ThisisabasicEMCRecommendationfortelecommunications.SourceITU-TRecommendationK.34wasapprovedbyITU-TStudyGroup5(2001-2004)undertheITU-TRecommendationA.8procedureon29July2003.iiITU-TRec.K.34(07/2003)FOREWORDTheInternationalTelecommunicationUnion(ITU)istheUnitedNationsspecializedagencyinthefieldoftelecommunications.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,implementorsarecautionedthatthismaynotrepresentthelatestinformationandarethereforestronglyurgedtoconsulttheTSBpatentdatabase.ITU2003Allrightsreserved.Nopartofthispublicationmaybereproduced,byanymeanswhatsoever,withoutthepriorwrittenpermissionofITU.ITU-TRec.K.34(07/2003)iiiCONTENTSPage1Scope............................................................................................................................12References.....................................................................................................................13Definitions....................................................................................................................14Abbreviations................................................................................................................25Electromagneticenvironmentalparameters.................................................................35.1Electrostaticvoltage.......................................................................................35.2ElectricalFastTransient/Burst(EFT/B).........................................................45.3Conductedradio-frequencyvoltages..............................................................45.4Radio-frequencyfields...................................................................................45.5d.c.voltages....................................................................................................45.6162/3Hzvoltages..........................................................................................55.750Hz/60Hzvoltages.....................................................................................55.8Audiofrequencyvoltages...............................................................................55.9Surges.............................................................................................................55.10Voltagevariation............................................................................................55.11Voltagefluctuation.........................................................................................55.12Voltageinterruption........................................................................................55.13Audiofrequencymagneticfields................................................