Foreword

ThiscodeisformulatedaccordingtotherequirementsofNoticeonArrangingthePlanofDevelopingStandardsforTelecommunicationEngineeringConstructionin2008(G.X.B.G.H.〔2008〕No.132)issuedbyformerministryofinformationindustry.

Requirementsonenergysavingofbuildings,telecommunicationequipmentandcorollaryequipmentforvarioustelecommunicationbureaus(stations)havebeenputforwardinthiscode.

Theprovision(s)inboldis(are)compulsoryone(ones)andmustbeenforcedstrictly.

ThetelecommunicationDevelopmentDivisionofMinistryofIndustryandInformationTechnologyisinchargeofinterpretingandimplementationsuperyisingofthiscode.PleasecontactTelecommunicationDevelopmentDivisionifyouwanttosupplementoramendthecontentsofthiscodeduringtheprocessofusage.PleaseposttherelevantopinionsforsupplementoramendmentTelecommunicationDevelopmentDivision(Address:No.13,WestChang'anStreet,Beijing,Postcode:100804).

ChiefEditorialOrganization:

ChinaInformationTechnologyDesigningandConsultingInstituteCo.,Ltd.

ChiefDraftingStaff:

LvWeiWangDiankuiLiHongxiaCuiHongyingZhaoKaiLiuWei

ZhangDekeGuLeiQiaoYueqiang

ParticipatingEditorialOrganization:

HuaxinConsultingCo.,Ltd.

ChinaMobileGroupDesignInstituteCo.,Ltd.

JiangsuPostsandTelecommunicationsPlanningandDesigningInstituteCo.,Ltd.

ChiefParticipatingStaff:

YeXiangyangSongFufengLuZhijun

Contents

1GeneralProvisions (1)

2RequirementsonEnergySavingofBuildings (2)

2.1GeneralLayoutofTelecommunicationCentres(Stations) (2)

2.2GeneralProvisionsonDesignforEnergySavingofTelecommunicationCentres(Stations) (2)

2.3RequirementsonDesignforEnergySavingofBuildingEnvelopesandMaterials (3)

2.4RequirementsonDesignforAirConditioningEnergySavingofTelecommunicationCentres(Stations) (4)

2.5RequirementsonDesignofElectricalEnergySavingforTelecommunicationCenires(Stations) (5)

3RequirementsonEnergySavingofTelecommunicationEquipment

andInstallationDesign (6)

3.1RequirementsonEnergySavingofTelecommunicationEquipment (6)

3.2RequirementsonEnergySavingforInstallationDesignofTelecommunicationEquipment (6)

4RequirementsonEnergySavingofPowerSupplyandDistributionSystems (8)

4.1GeneralRequiremens (8)

4.2RequirementsonSelectionandConfigurafionofEquipment (8)

4.3SelectionandLayingofConductors (9)

4.4AplicationofRenewableEnergySources (9)

AppendixAExplanationsonWordingofThisCode (11)

ExplanationofProvisions (13)

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1GeneralProvisions

1.0.1Thiscodeisapplicabletothedesignforenergysavingofnewlybuilttelecommunicationcentres(stations),andmaybereferredandexecutedfortherenovationandextensionoftelecommunicationcentres(stations).

1.0.2Threemainaspectsonthedesignforenergysavingoftelecommunicationcentres(stations),i.e.,energysavingforbuildings,telecommunicationequipmentandcorollaryequipment,shallbetakenintoconsideration.

1.0.3Measuresandsolutionsforenergysavingadoptedinthedesignforenergysavingshallnotreducethesafetyonoperationoftelecommunicationsystems.

1.0.4Theenergysavingdesignshalladjustmeasurestolocalconditions,attaintheadvancedtechnology,reasonableeconomic,safetyandserviceability.Therenovationandextensionengineeringshallfullyconsiderthefeaturesofexistingtelecommunicationcentres(stations),userationallytheexistingbuildings,equipment,takeactivelythereformationmeasuresandstrivetoreachthegoalofadvancement,serviceabilityandeconomy.

1.0.5Incasewherethiscodeconflictswithrelevantnationalstandardsandcodes,nationalstandardsandcodesshallprevail.Ifitisdifficulttoimplementindividualprovisionsofthiscode,sufficientreasonsshallbegiveninthedesign,whichshallbeapprovedbycompetentauthorities.Incasewhererelevanttechnicalrequirementsofotherstandardsandcodesfortelecommunicationindustryconflictwiththiscode,thiscodeshallprevail.

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2RequirementsonEnergySavingofBuildings

2.1GeneralLayoutofTelecommunicationCentres(Stations)

2.1.1Siteselectionoftelecommunicationcentres(stations)shallmeettherequirementsofCodeforDesignofTelecommunicationPrivatePremiseYD/T5003-2005.

2.1.2Generallayoutanddesignoftelecommunicationcentres(stations)shouldtakefulluseofsunlightinwinterandnaturalventilationinsummerandavoidprevailingwinddirectioninwinter.Theoptimalorientationortheapproximatebestorientationatthisareashouldbeselectedasthemainorientation,soastoavoidthemaximumsunlightorientationinsummer.

2.2GeneralProvisionsonDesignforEnergySavingofTelecommunicationCentres(Stations)

2.2.1Thethermalperformanceforbuildingenvelopesoftelecommunicationcentres(stations)shallmeetrelevantrequirementsasstipulatedinArticle4.2.2ofDesignStandardforEnergyEfficiencyofPublicBuildingsGB50189-2005.

2.2.2Thedesignoftelecommunicationcentres(stations)shallcontroltheshapecoefficient.Theshapecoefficientshouldnotbetoobig.Theshapecoefficientoftelecommunicationcentres(stations)inseverecoldorcoldregionsshallbelessorequalto0.40.

2.2.3Thearearatioofwindowtowallfortelecommunicationcentres(stations)atdifferentorientationshallmeettherequirementsofDesignStandardforEnergyEfficiencyofPublicBuildingsGB50189-2005.

2.2.4Telecommunicationcentres(stations)shallnotbeequippedwithlargeareaofcurtainwallsmadeofglass(orothertransparentmaterials).

2.2.5Wholeyearunattendedequipmentroomsshallnotbeequippedwithexternalwindows.

2.2.6Fortelecommunicationcentres(stations)builtinareasofhotsummerandwarmwinterorhotsummerandcoldwinterandthosebuiltincoldregionswithhighcoolingload,externalwindowsshouldhavesunshadesoutside.TheshadingcoefficientshallmeettherequirementsofDesignStandardforEnergyEfficiencyofPublicBuildingsGB50189-2005.

2.2.7Telecommunicationcentres(stations)inseverecoldorcoldregionsshallnothaveopentypestaircasesandopentypeoutercorridor.

2.2.8Outerdoorsoftelecommunicationcentres(stations)shalladoptthemeasuresofheatinsulationandenergysaving.Theouterdooroftelecommunicationcentres(stations)inseverecoldregionsshallbeequippedwithfoyers;andthoseoftelecommunicationcentres(stations)incoldregionsshallbeequippedwithfoyers,andifthefoyersarenotequippedwith,themeasurestoreducecoldairinfiltrationshallbetaken.

2.2.9Theopeningsandholesthatcablesandpipelinesoftelecommunicationcentres(stations)passthroughbuildingenvelopeshallbesealedtightlybyfirestoppingmaterialsofequivalentfireenduranceaccordingtorequirementsofTechnicalSpecificationforApplicationofFireStoppinginBuildingsCECS154:2003.

2.2.10Theinternalsurfacetemperatureofouterwallsandthermalbridgepartsatroofsof

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telecommunicationcentres(stations)shallnotbelowerthanthedewpointtemperatureofindoorairs.Whenthetemperaturedifferencebetweentheupperlayerair-conditionedroomsandlowerlayerair-conditionedroomoftelecommunicationcentres(stations)ishigh,itshallbeensuredthattheinternalsurfacetemperatureofupperandlowerroomsshallnotbelowerthanthedewpointtemperatureofindoorairs.

2.2.11Theplatformsforairconditioningoutdoorunitsoftelecommunicationcentres(stations)shouldbenearbytheairconditioningindoorunits.Theplatformsforairconditioningoutdoorunitsshouldbeopenwide,notfacingtothewest.Andproperareaofplatformforoutdoorunitsshallbereservedinaccordancewiththequantityandarrangementmodeofairconditioningoutdoorunits.

2.3RequirementsonDesignforEnergySavingofBuildingEnvelopesandMaterials

2.3.1Wallsoftelecommunicationcentres(stations)shallmeetthefoHowingrequirementsforthepurposeofenergysaving:

1Materialsforwallswithenergysavingfunctionshallbeadopted;

2Highefficientthermalinsulationmaterialsforbuildingsshallbeadopted;

3Buildingsatcold,hotsummerandcoldwinterandhotsummerandwarmwinterzones,whenlightstructuresareusedforwalls,shallbetakenwithcheckcalculationonthermalinsulationaccordingtorequirementsofThermalDesignCodeofCivilBuildingsGB50176;

4Forouterwallsoftelecommunicationcentres(stations)atseverecoldandcoldregions,whicharetobeinsulated,externalthermalinsulationstructuresshallbechosenfirstly.ThetechnologiesrecommendedbyTechnicalSpecificationforExternalThermalInsulationonWallsJGJ144-2004anddesignstandardsforenergysavingoflocalbuildingsshallbeadoptedinthedesign.

2.3.2Doorsandwindowsfortelecommunicationcentres(stations)shallmeetthefollowingrequirementsforthepurposeofenergysaving:

1Highenergyefficientglassshallbeadopted;

2Highenergyefficientmaterialsformakingframesofdoorsandwindowsshallbeadopted;

3Highenergyefficientdoorsandwindowsshallbeadopted;

4Thegastightnessofexternalwindowsoftelecommunicationcentres(stations)shallnotbelowerthánLevel4asstipulatedintheGraduationsandTestMethodsofAirPermeabilityforBuildingExternalWindowsGB/T7107-2002,withgoodperformanceindustproof,waterproof,fireprotection,windresistanceandheatinsulatingproperty,andsatisfyingtherequirementsoncleanlinessoftelecommunicationequipmentroomsdesignedaccordingtotelecommunicationtechnology;

5Fireproofdoors,withthermalinsulationpropertiesandinstalledwithdoorcloser,shouldbeselectedforequipmentroomsoftelecommunicationcentres(stations).

2.3.3Telecommunicationcentres(stations)roofsshallmeetthefollowingrequirementsforthepurposeofenergysaving:

1Accordingtodifferentregionsandconditionsforthermalinsulationofroofs,severalmeasuresshallbetaken,suchaslayinginsulatinglayersandinversiontyperoofs,settingupemptyspaceorairspaceandroofgreeningandsoon;

2Insulatinglayersofroofsshouldbemadeofmaterialswithlowwaterabsorption,lowdensityandheatconductivitycoefficient,certainstrengthandcorrosiveresistantforalongtermofimmersion.

2.3.4Floorsoftelecommunicationcentres(stations)shallmeetthefollowingrequirementsforthepurposeofenergysaving:

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1Theheattransfercoefficientandthethermalresistanceofraisedoroutsidecarryfloors,floorsbetweenheatingroomsandnon-heatingrooms,surroundinggroundsornon-surroundinggroundsandouterwallsofheatingbasements(wallscontactingsoil),whichareattheundersurfacesoftelecommunicationcentres(stations)andcontactoutsideair,shallmeetrelevantrequirementsasstipulatedinArticle4.2.2ofDesignStandardforEnergyEfficiencyofPublicBuildingsGB50189-2005;

2Forinsulatinglayerslaidatgroundsandfloors,materialswiththestrengthcomplyingwithgroundrequirementsincludinghardextrudedpolystyreneboards,foamglassinsulationboardsandthelike,shallbeadopted,andthecombustionperformanceshallmeettherequirementsofexistingnationalstandardsandcodes.

2.4RequirementsonDesignforAirConditioningEnergySavingofTelecommunicationCentres(Stations)

2.4.1Airconditioningsystemsinnewlybuilttelecommunicationequipmentroomsshallmeetrelevantrequirementsofnationalenergysavingandenvironmentalprotection,andrelevantdesigningschemesshallbedeterminedaccordingtothescaleofbuildings,thefeatureonheatingdissipatingcapacityoftelecommunicationequipmentinstalled,localmeteorologicalconditionsandenergystateandviathetechno-economiccomparison.

2.4.2Forairconditioningsystemsofrenovationand/extensionprojects,thedesigningschemeshallbedeterminedaftercomprehensiveconsiderations,accordingtotheairconditioningmodeatoriginalbuildingsandrequirementsonusageofairconditioningsystemsofrenovationandextensionprojects.

2.4.3Duringthedesignofairconditioningsystems,theindoordesigntemperatureshallnotbelessthan26℃inthecasewherenormalworkingconditionsoftelecommunicationequipmentaresatisfied.

2.4.4Whenrelevantrequirementsaresatisfied,freshairvolumeshallbeloweredasmuchaspossibleinsummer,soastoreducetheairconditioningload.

2.4.5Duringthedesignoflcentralairconditioningsystems,outdoorairshallbeusedasnaturalcoldsourceintransitionseasonandwinteraccordingtolocalclimaticfeaturesofconstructionprojects,soastoreducetheoperationtimeofcoldwaterhost.

2.4.6Whendistributedairconditioningsystemsareused,theenergyeficiencyratio(EER)fordedicatedairconditionersatequipmentroomsshallbehigherthan2.8,andthesensibleheatratiohigherthan0.9.

2.4.7Themodeofdownsideairsupplyandtheupperairreturnshallbeadoptedforthetelecommunicationequipmentroomswithhighheatvalue.Theheightofraisedfloors,beingusedforairsupply,shallbedeterminedaccordingtothecalculationofsupplyairvolume,butthenetheightshallnotbelowerthan350mm.Thecablesoftelecommunicationequipmentshallnotbelaidundertheraisedfloors.

2.4.8Duringupperairsupplyofequipmentrooms,iftheairsupplydistanceforequipmentroomsiswithin10m,theairsupplymodewithdirectairinletfrommainblastlineofplenumchamberandthatwithairsupplycapshallbeadopted;iftheairsupplydistanceforequipmentroomsiswithin15m,theairsupplymodewithblastpipeshallbeadopted,andthedimensionsofairpipesandairdistributorsshallbedeterminedaccordingtocalculationofheatdissipatingcapacityoftelecommunicationequipment;iftheairsupplydistanceforequipmentroomsishigherthan15m,theairsupplymodewitharrangementofairconditioningindoorunitsattwosidesshallbeadopted.

2.4.9Horizontaldistanceandverticaldistanceofairconditioningindoorunitsandoutdoorunitsfortelecommunicationequipmentroomsshallbeasshortaspossible.

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2.4.10Duringthedesignofairconditioningoutdoorunits,thespacingshallbedeterminedaccordingtotheairvolumedemandedforheatdissipationofoutdoorunits.

2.4.11Forequipmentroomoflargeareawithmanyairconditioners,wheretheheatdissipatingcapacityoftelecommunicationequipmentisuneven,whethertheself-adaptivecontrolsystemofairconditionerisadoptedshallbedeterminedbytechno-economiccomparison.

2.4.12Theenergysavingdesignforairconditionersatbasestationsshallmeetthefollowingrequirements:

1Fornewlybuiltbasestations,theenergysavingdesignshallbeconsidered;forbuiltuporexistingbasestations,properenergysavingmeasuresshallbetakenaccordingtositeconditionsforthepurposeofenergysavingreconstruction;

2Theenergysavingschemesforairconditionersatnewlybuiltandexistingbasestationsshallconsiderfactorssuchaslocalmeteorologicalandenvironmentalfactorsofbasestations,thestructureofequipmentroombuildings,equipmentlayout,equipmentpowerconsumptionandairfloworganizationofairconditionersandthelike.Theoptimalandcomprehensiveenergysavingschemewillbeselectedviatechno-economiccomparison.

2.5RequirementsonDesignofElectricalEnergySavingforTelecommunicationCentres(Stations)

2.5.1Lampsoftelecommunicationcentres(stations)shallmeetthefollowingrequirements:

1Thehighenergyefficientlightsourcesuchasfluorescentlamps,energysavinglamps,halogenlampsorLEDlampsshallbeselected,andforfluorescentlamps,T8orT5seriesthree-bandfluorescentlampsshallbeselected;fluorescentlampslareequippedwithelectronicballastandhalogenlampsareequippedwithhighefficientmagneticballast;

2Forhalogenlampsand/fluorescentlampsandthelikeproductsadoptingcapacitancecompensation,theirpowerfactorshallbehigherthan0.9;

3Lampsshallbeproductsofhighefficiency;theefficiencyofopentypelampswithreflexhousingshallnotbelessthan75%;theefficiencyofgrillelampsshallnotbelessthan60%.

2.5.2Theilluminancestandardoftelecommunicationcentres(stations)shallbeobtainedavaluestrictlyaccordingtorecommendationofnationalandprofessionalstandards.Forsomepartsofhighdemand,locallightingmaybeused.

2.5.3Controloflampsshallmeetthefollowingrequirements:

1Switchesofilluminationlampsshallbesetproperlyinequipmentrooms.Lampsneartowindowsshallbecontrolledindividually.Illuminationinequipmentroomsshallbecontrolledinseparatezones.Andlampsateachcontrolzoneshallhaveafullopenstateandahalfopencontrolstate;

2Switchesoflampsatstaircasesshallbeenergysavingself-extinguishingswitches;

3Illuminationforauxiliaryundergroundgaragesandwalkwaysshallbecontrolledbyzonesandintervals.

2.5.4Otherelectricequipmentshallmeetthefollowingrequirements:

1Fansandwaterpumpsshallbehighefficientandenergysavingproducts;

2Lifewaterpumpsandcommonlyusedfansthatarestartedfrequentlyshalladoptfrequencyconvertingcontrol;

3Centres(stations)withcentralairconditioningorlargeareashalladoptbuildingautomationcontrolsystems.

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3RequirementsonEnergySavingofTelecommunication

EquipmentandInstallationDesign

3.1RequirementsonEnergySavingofTelecommunicationEquipment

3.1.1ThetemperatureandtherelativehumidityoftelecommunicationequipmentroomsshallbeinaccordancewithrequirementsofTable3.1.1.

Table3.1.1Thetemperatureandtherelativehumidityoftelecommunicationequipmentrooms

Telecommunicationequipment

Scopeoftemperature/℃

Scopeofrelativehumidity/%

ClassItelecommunicationequipmentrooms

+10-+26℃

40%-70%

ClassIⅡtelecommunicationequipmentrooms

+10-+28℃

20%-85%

ClassⅢtelecommunicationequipmentrooms

+10-+30℃

20%-90%

Notes:1Temperatureandrelativehumidityofquipmentroomsrefertotheraluemeasuredaaplace2mabovethegroundsurfaceand0.4minfrontofequipment.

2Thechangerateoftemperatueinelecommunicauonequpmentromshalbelessthan5C/h.

3Nocondensationisformedintelecommunicationequipmentrooms.

4ClassItelecommunicationequipmentroomsand/equipmentincludeDC1andDC2longdistanceexchangers,backbone/provincialtransitionpoints,backbone/provincialintlligentnetworkSCP,transmissioncentresatLevelIandⅡtrunklines,backbone/provincialbackbonedataequipment,internationalnetworkequipment,inter-provincialnetworkequipment,provincialnetworkequipment,naionalbackbonenetworksfordataserviceofChinaMobileNet(CMNET),thebusinesssystemconstructediniensivelynationwideandundertakethewholenetworkoregionausnes,LevelItrunklineequipmentforopticaltransportnetworkandpowerequipmentrooms.

5ClassⅡtelecommunicationequipmentroomsandequipmentincludetandemoffices,gateways,localintelligentnetworkSCP,backbonenodesatlocaltransmissionnetwork,localdatabackbonenodes,DCequipmentrooms,VIPbasestations,switchingequipmentforimportantusers(keydepartments),transmissionequipment,telecommunicationequipmentroomsfordatatelecommunicationequipmentandpowerequipmentrooms.

6ClasITelecommunicationequipmentroomsincludetelecommunicationquipmentroomsforcitycalledofices,data

equipmentroomsfordistributionlayersofmetropolitanareanetworksandaflatedpowerequipmentrooms,long-distancetransferrelaystations,commonbasestations,basestationsformarginalnetworksandnetworkoptimizationbasestations.

3.1.2Equipment(newlybuiltracks)ofcorenetworkincapacityexpansionmustadoptverticallyinsertedplatestructures.

3.1.3Anti-backflowmeasuresshallbetakeninracksoftelecommunicationequipmentrooms.

3.1.4Thetelecommunicationequipmentmayadoptlowerairintakemode,frontairdraftmodeorsideairintakemode.Ifairaresuppliedfromtheblowing-insideofairconditioner,theapertureratioofplatesfortelecommunicationequipmentshallnotbelowerthan50%.

3.1.5Telecommunicationequipmentshalloptimizeitspowermanagementbyintelligentsoftware,toreduceconsumptionofequipmentbyintelligentpowermanagement.

3.2RequirementsonEnergySavingforInstallationDesignofTelecommunicationEquipment

3.2.1Typeselectionoftelecommunicationequipmentshallmeetthefollowingrequirements:

1Onpreconditionthattechnicalandserviceindexesaresatisfied,equipmentofhighintegration,lowpowerconsumptionandenergysavingtechnologyshallbeselectedpreferentially.

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2Onpreconditionthatnormaloperationandmaintenanceofequipmentaresatisfied,productswithnaturalheatdissipationfunctionshallbeselectedpreferentially,soastoreducetheusageoffans;

3Equipment,inwhichcarriersandthelikecomponentsofbasestationscanbeturnedon/offaccordingtothebusinessvolumeload,shouldbeselected.Whenthenetworkloadislower,partsofcarriersmaybeturnedoff.

3.2.2Inthedesign,varioustelecommunicationequipmentshallbeusedcomprehensively,soastoreducethequantityofequipmentandsupportingfacilities,andthefollowingrequirementsshallbecompliedwith:

1Takefulluseofauxiliaryresourcesatexistingsites,andshareequipmentrooms,powersupplyandairconditionersandthelikefacilities;

2Whenindoorcoversystemsarebuilt,differentservicepatternsoftelecommunicationsystemsshouldsharethedistributionsystem,soastoreducethequantityofrelevantdevicesandfeedersandusageofactivedevices.

3.2.3Onpreconditionthatensuresafetyandconvenienceformaintenance,telecommunicationequipmentshallbearrangedproperly,andfollowingrequirementsshallbecompliedwith:

1Inthetelecommunicationequipmentroomstheequipmentframecolumnspacingshallbedeterminedaccordingtoheatdissipatingcapacityoftelecommunicationequipmentandexpectedairvolumeofairconditioners;

2Whenequipmentoftelecommunicationequipmentroomsarearranged,relativelyindependentcoldandhotpassagesshallbemarkedoff,topreventcoldairmixingwithhotairbeforeenteringtheracks.

3.2.4Duringthedesignnetworksshallbeorganizedandoptimizedproperly.Variousnewenergysavingtechnologiesshallbetakenactively,andfollowingrequirementsshallbecompliedwith:

1Complywiththedevelopingtrendoftelecommunicationtechnology,anduseIPtechnologyArchitectureNetwork;

2Optimizethedesignofnetwork,simplifythenetworkstructure,enhancethenetworkutilizationandavoidequipmentbeingleftunused;

3Whenawirelessnetworkschemeisformulated,theoverlappingregioncoveredbybasestationsshallbereducedtothegreatestextent,onpreconditionthatthecoverageindexandqualityrequirementsaresatisfied,and,besides,varioustechniquesforenhancingcoverageshallbeutilizedreasonablysoastosaveresourcesofsitesandequipmentofbasestations;

4Whenatransmissionnetworkisbuilt,advancedtransmissiontechniquesshallbeselectedpreferentiallyfornetworkorganization,soastoreducethequantityofnetworkequipment,andSDHequipmentshalladopthigh-capacitynodeequipment,substitutingmultiterminalequipment;

5WhenalongdistanceWDMsystemisbuilt,thesuperlongdistancetransmissiontechniqueshallbeselectedpreferentially,soastoreducethesettingoflightregenerationsitesandlightamplifyingsite(OA);

6Promotethemulti-servicetransportplatform(MSTP)technologyactively,anduseanunifiedplatformforcarryingtraditionalanddataservices,soastoavoidadditionaltransmissionequipmentduetoincreasingofdataservices.

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4RequirementsonEnergySavingofPowerSupplyandDistributionSystems

4.1GeneralRequirements

4.1.1Followingenergysavingmeasuresshallbetakenduringthedesignofpower/supplyanddistributionsystems.

4.1.2Inthedesign,energysavingequipmentshallbeselected,toreducetheenergyconsumptionofequipmentandenhancetheoverallenergysavingeffectofthesystem,

4.1.3Inthedesign,thepowerfactorofpowersupplysystemshallbeashighaspossible,andtheharmonicsuppressionshallbeperformedactively.

4.1.4Accordingtoloadingcapacity,powersupplydistanceanddistributionandfeaturesofelectricequipmentandthelikefactors,thecentralizedpowersupplymodeordistributedpowersupplymodeforpowerdistributionsystemsshallbeselectedproperlyandthequantityofconductorsshallbereduced,andpropercross-sectionofconductorsandlinelayingschemesshallbeselected,soastoreducethelossofdistributionlines.

4.2RequirementsonSelectionandConfigurationofEquipment

4.2.1Typeselectionofpowerequipmentshallmeetthefollowingrequirements:

1Selecttheenergysavingtypeofequipmentcertifiedbynationalcertificationbodies;

2Selectthedistributionequipmentincompliancewithrequirementsofnationalenergysavingstandards;

3Basestationswithhigh-frequencyswitchrectifiershouldadoptequipmentofthesmartsleepmode;

4Theefficiencyofswitchingpowersupplyanduninterruptiblepowersupply(UPS)shallmeettherequirementsofrelevantnationalandprofessionalstandards.

4.2.2Selectionandconfigurationofpowertransformerequipmentshallmeetthefollowingrequirements:

1Transformersshallbe