GB 50689-2011 GB50689-2011通信局（站）防雷與接地工程設(shè)計(jì)規(guī)范:英文

專用

人人文庫

NATIONALSTANDARD

OFTHEPEOPLESREPUBLICOFCHINA

CodeforDesignofLightningProtectionandEarthing

EngineeringforTelecommunicationBureaus（Stations）

GB50689-2011

ChiefDevelopmentDepartment：MinistryofIndustryandInformationTechnology

ofthePeoplesRepublicofChina

ApprovalDepartment:MinistryofHousingandUrbanRuralDevelopment

-

ofthePeoplesRepublicofChina

ImplementationDate：May1，2012專用

人人文庫

ChinaPlanningPress

Beijing2019

ChineseeditionfirstpublishedinthePeoplesRepublicofChinain2011

EnglisheditionfirstpublishedinthePeoplesRepublicofChinain2019

byChinaPlanningPress

rd

，，專用

3FloorCTowerGuohongBuilding

No.A11，Muxidi-Beili，XichengDistrict

Beijing，100038

PrintedinChinabyFactoryattachedtoBeijingInstituteofGraphicCommunication

?2011byMinistryofHousingandUrban-RuralDevelopmentof

thePeoplesRepublicofChina

Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformor

byanymeans人人文庫，graphic，electronic，ormechanical，includingphotocopying，recording，

oranyinformationstorageandretrievalsystems，withoutwrittenpermissionofthepublisher.

Thisbookissoldsubjecttotheconditionthatitshallnot，bywayoftradeorotherwise，belent，

resold，hiredoutorotherwisecirculatedwithoutthepublisherspriorconsentinanyformof

blindingorcoverotherthanthatinwhichthisispublishedandwithoutasimilarcondition

includingthisconditionbeingimposedonthesubsequentpurchaser.

ISBN978-7-5182-1097-8

AnnouncementoftheMinistryofHousingandUrban-Rural

DevelopmentofthePeoplesRepublicofChina

No.981

AnnouncementonPublishingtheNationalStandardof

CodeforDesignofLightningProtectionandEarthing

EngineeringforTelecommunicationBureaus（Stations）

CodeforDesignofLightningProtectionandEarthingEngineeringforTelecommunication

Bureaus（Stations）hasbeenapprovedasanationalstandardwithaserialnumberofGB50689-2011

andshallbeimplementedfromMay1，2012.Articles1.0.6、3.1.1、3.1.2、3.6.8、3.9.1、3.10.3、3.11.2、

3.13.6、3.14.1、4.8.1、5.3.1、5.3.4、6.4.3、6.6.4、7.4.6、9.2.9aremandatoryandmustbeenforcedstrictly.

AuthorizedbytheStandardRatingResearchInstituteoftheMinistryofHousingandUrbanRural

專用-

DevelopmentofthePeoplesRepublicofChina，thisstandardispublishedbyChinaPlanningPress.

MinistryofHousingandUrbanRuralDevelopmentofthePeoplesRepublicofChina

-

April2，2011

人人文庫

Foreword

ThiscodeisformulatedbyChinaInformationTechnologyDesigningandConsultingInstitute

Co.，Ltd.accordingtotherequirementsofDocumentJianBiao〔2008〕No.105issuedbyMinistryof

HousingandUrbanRuralDevelopment"NoticeofPrintingandDistributingtheDevelopmentand

--

RevisionPlan（Secondpitch）ofNationalEngineeringConstructionStandardsin2008".

Duringtheformationofthiscode，theformationteamhasstudiedlotsofthecurrentnationallaws，

regulationsandstandards，maderelevantinvestigations，summarizedyearsofexperienceonthedesign

oflightningprotectionandearthingengineeringforTelecommunicationBureaus（Stations），repeatedly

discussedandmodifiedprovisionsofthiscodeandfinalizedthecodeafterexaminationbasedonsolicit

opinionsfromallsides.

Thiscodecomprises9chaptersand7appendixeswiththemaincontentsasfollows：general

provisions，terms，basicrequirements，thelightningprotectionandearthingofcomprehensive

telecommunicationbuilding，thelightningprotectionandearthingofcabletelecommunicationbureaus

（stations），thelightningprotectionandearthingofmobiletelecommunicationbasestation，the

lightningprotectionandearthingofsmalltelecommunicationstation，thelightningprotectionand

earthingofmicrowaveandsatelliteearstationsandthedesignoflightning專用overvoltageprotectionfor

-

telecommunicationbureaus（stations）andsoon.

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

MinistryofHousingandUrbanRuralDevelopmentisinchargeoftheadministrationofthiscode

-

andtheexplanationofthecompulsoryprovisions.ChinaInformationTechnologyDesigningand

ConsultingInstituteCo.，Ltd.isresponsiblefortheexplanationofspecifictechnicalcontents.All

relevantorganizationsarekindlyrequestedtosumupandaccumulateyourexperiencesinactual

practicesduringtheprocessofimplementingthiscode.RelevantopinionscanbepostedtoChina

InformationTechnologyDesigningandConsultingInstituteCo.，Ltd.（Address：ZhuYuCommercial

Center，No.5ShouTiNanRD，HaiDianDistrict，Beijing，Postcode：100048）forreferenceofrevision

infuture.

:

ChiefDevelopmentOrganization

ChinaInformationTechnologyDesigningandConsultingInstituteCo.，Ltd

:

ChiefDraftingStaff

人人文庫LiuJikeZhuQingfengChenQiangShiYuhaiWangZhigangQiZheng

NiuNianzeng

:

ChiefExaminationStaff

YangShizhongLinYongshuangGaoJianXuWeijieLiZhi

ZhangDongliangGuoYapingDaiChuanyouGuoWuSunYanling

QiuChuanruiLouJieliangXiaoBoLuZhiJun

Contents

1GeneralProvisions……………（1）

2Terms…………………………（2）

3BasicRequirements……………（6）

3.1GeneralRequirements…………（6）

3.2CompositionofEarthingSystem…………………（6）

3.3EarthElectrode…………………（7）

3.4EarthingConnection……………（8）

3.5MainEarthingConductor………………………（8）

3.6EarthingConductor……………（8）

3.7TheTypesofEquipotentialBonding………………（9）

3.8TheAccessingWaysofVariousCables……………（10）

3.9TheLayoutRequirementsofEarthingConductor……………………（10）

3.10TheProtectionoftheComputerNetworkInterfaceandControlTerminalInterface……（10）

3.11TheEarthingofCentralizedMonitoringSystemandtheInterfaceProtection專用…………（11）

3.12TheLayoutofCablesintheBureau………………（11）

3.13PowerDistributionSystem………………………（11）

3.14TheEarthingofAuxiliaryEquipmentintheEquipmentRoom………（12）

3.15TheLightningProtectionandEarthingofOpticalFiberCable………（12）

4TheLightningProtectionandEarthingofComprehensiveTelecommunicationBuilding……（15）

4.1GeneralRequirements…………（15）

4.2TheTypesofEarthingandBonding………………（16）

4.3TheTypesofInternalEquipotentialBonding………（19）

4.4EarthGrid……………………（19）

4.5TheEarthingoftheCablesEnteringintoBureau……………………（20）

4.6TheEarthingofTelecommunicationEquipment……………………（20）

4.7TheEarthingofPowerSupplySystem……………（23）

4.8TheEarthingofOtherFacilities…………………（23）

4.9TheLightning人人文庫ProtectionDesignofBuilding………（24）

5TheLightningProtectionandEarthingofCableTelecommunicationBureaus（Stations）…（25）

5.1ExchangeBureauandDataBureau………………（25）

5.2AccessNetworkStationandModuleBureau………（26）

5.3BroadbandAccessSites…………（27）

5.4FiberCableRepeaterStation……………………（28）

5.5TheEarthingofDCPowerDistributionSystemforTelecommunicationEquipment……（28）

6TheLightningProtectionandEarthingofMobileTelecommunicationBaseStation…………（29）

6.1GeneralRequirements…………（29）

6.2EarthGrid……………………（29）

·1·

6.3DirectStrokeProtection…………（31）

6.4TheEarthingofAntennaandFeedingCable………（31）

6.5TheLightningProtectionandEarthingofDCRemoteFeedingSystem…………………（32）

6.6TheLightningProtectionofEarthingofGPSAntennasandFeedingCables……………（33）

6.7InternalEquipotentialBonding……………………（33）

6.8TheHandlingofEarthingConnectionandIndoorEarthing……………（34）

6.9TheEarthingofOtherAccessingCables……………（35）

6.10TheEarthingofDCPowerDistributionSystemforTelecommunicationEquipment……（35）

7TheLightningProtectionandEarthingofSmallTelecommunicationStation………………（36）

7.1GeneralRequirements…………（36）

7.2EarthGrid……………………（36）

7.3DirectLightningProtection………………………（37）

7.4Others…………………………（38）

8TheLightningProtectionandEarthingofMicrowaveandSatelliteStations…（39）

8.1TheLightningProtectionandEarthingofMicrowaveStations………（39）

8.2TheLightningProtectionandEarthingofSatelliteStations…………（41）

9TheDesignofLightningOverVoltageProtectionforTelecommunication

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Bureaus（Stations）……………（42）

9.1GeneralRequirements…………專用（42）

9.2TheApplicationRequirementsofSPD……………（42）

9.3ThePrinciplesofLightningOverVoltageProtectionforthePowerSystemin

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TelecommunicationBureaus（Stations）……………（43）

9.4TheInstallationRequirementsofPowerSPD………（49）

9.5ThePrinciplesofLightningOverVoltageProtectionDesignforComputerNetworksandSignalCables……（50）

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AppendixATheStatisticsTablesoftheAverageNumberofThunderstormDaysin

OneYearonMajorCities…………（52）

AppendixBTheNationwideZonedMapoftheAverageNumberofThunderstormDays

inOneYear…………（54）

AppendixCTheRequirementsofSPDProtectionMode………（55）

AppendixDMesh，StarandStarMeshMixedEarthingSystem………………（56）

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AppendixETheTestofEarthingResistance……………………（57）

AppendixFTheMeasurementofEarthResistivity……………（59）

AppendixGLightning人人文庫ProtectionZones…………（61）

ExplanationofWordinginThisCode……………（63）

ListofQuotedStandards…………（64）

Addition：ExplanationofProvisions………………（65）

·2·

1GeneralProvisions

Thiscodeisformulatedwithaviewtopreventingorreducingthedangeroflightningstrokeat

1.0.1

telecommunicationbureaus（stations），ensuringthesafetyofthepersonnelandalsoensuringthe

telecommunicationequipmentundersafetyandnormalworkconditions.

Thiscodeisapplicabletothedesignoflightningprotectionandearthingengineeringfor

1.0.2

construction，reconstructionandextensionoftelecommunicationbureaus（stations）.

Thelightningprotectionandearthingengineeringoftelecommunicationbureaus（stations）shall

1.0.3

beconstructedbasedoncommonearthing，voltagesharingequipotentialandpartitionedprotection，

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andtheinstallationpositionofSPD（SurgeProtectiveDevice）shallbeplannedreasonablyaccordingto

thetheoryofelectromagneticcompatibilityandtheprincipleoflightningprotectionzones.

Theriskassessmentonlightningstrokeforthedesignoflightningprotectionandearthing

1.0.4

engineeringfortelecommunicationbureaus（stations）shallbebasedonfieldinvestigationdata，

geographicalenvironment，annualthunderstormdaysandtypesofthetelecommunicationbureaus

（stations）.

SPDsselectedforlightningovervoltageprotectionprojects專用shallcomplywithtechnical

1.0.5-

requirementsontelecommunicationlightningprotectionproductsoftheMinistryofIndustryand

InformationTechnology.

1.0.6OnlythosequalifiedSPDstestedbyathirdpartytestingdepartmentaccreditedbythestate

mustbeselectedforlightningover-voltageprotectionprojectsoftelecommunicationbureaus

（）

stations.

Theannualthunderstormdaysshallbedeterminedaccordingtodataprovidedbythelocal

1.0.7

meteorologicaldepartmentsoftelecommunicationbureaus（stations）ortheprovisionsofAnnexAand

Binthiscode.

Forthedesignoflightningprotectionandearthingengineeringoftelecommunicationbureaus

1.0.8

（stations），notonlytherequirementsstipulatedinthiscodebutalsothoseinthecurrentrelevant

standardsofthenationshallbecompliedwith.

人人文庫

·1·

2Terms

Lightningprotectionzones（LPZ）

2.0.1

Azoneeasilytobeaffectedbylightningstrokeisclassifiedtobetheprotectedzonesinaccordance

withthedifferencesoftheinsideandtheoutsideofbuildings，environmentsoftelecommunication

roomsandprotectedequipmentoftelecommunicationbureaus（stations）.Suchprotectedzonesare

calledthelightningprotectionzones.

Thunderstormday

2.0.2

Athunderstormdaymeansonedaywhenmorethanonethundermaybeheard.

Lowkerauniczones

2.0.3

Lowkerauniczonesarethoseareaswheretheaveragenumberofthunderstormdaysinoneyearis

nomorethan25.

Middlekerauniczones

2.0.4

Middlekerauniczonesarethoseareaswheretheaveragenumberofthunderstormdaysinoneyear

iswithinarangeof26-40.

Highkerauniczones專用

2.0.5

Highkerauniczonesarethoseareaswheretheaveragenumberofthunderstormdaysinoneyearis

withinarangeof41-90.

Strongkerauniczones

2.0.6

Strongkerauniczonesarethoseareaswheretheaveragenumberofthunderstormdaysinoneyear

ismorethan90.

Kerauniczones

2.0.7

Thekerauniczonesareclassifiedintolowkerauniczones，middlekerauniczones，highkeraunic

zonesandstrongkerauniczonesaccordingtoaveragenumbersofannualthunderstormdays.

Evaluationoflightningstrikerisk

2.0.8

Itisamethodtohavecomprehensiveevaluationonextentofdamageofthebureaus（stations）due

tolightningstroketotheearthandthendeterminelevelsandclassesofprotection，inaccordancewith

variousfactorsoflightningstroke.

Directlightningflash

2.0.9

Itisaflashdirectly人人文庫attackingbuildingsorlightningprotectionsystems.

Directstrokeprotection

2.0.10

Itisameasuretoprotectbuildings，structures，electricnetworksorelectricalinstallationsfrom

beingattackedbydirectlightningflash.

Airterminalsystem

2.0.11-

Itincludeslightningrods，lightningstrips（conductors）andlightningprotectionnetsthatreceive

lightningstrokedirectly.

Rollingspheremethod

2.0.12

Itisasimplifiedanalysismethodbyapplyingtheelectricgeometrictheorytolightningprotection

analysisofbuildings.

·2·

Downconductorsystem

2.0.13-

Itisametalconductorconnectedtotheairterminalsystemandtheearthterminationsystem.

--

Lightningelectromagneticpulse（LEMP）

2.0.14

Itisanelectromagneticradiationhavingrelationshipwithlightningdischarge.Theelectricfieldand

themagneticfieldgeneratedtherebywillbecoupledtotheelectricorelectronicsystem，thus

destructivesurgecurrentorsurgevoltagewillbeproduced.

Externallightningprotectionsystem

2.0.15

Comprisedofanairterminalsystem，adownconductorsystemandanearthterminationsystem，

---

itismainlyusedasaprotectiondevicetopreventdirectlightningflash.

Soilresistivity

2.0.16

Itisaparameterrepresentingtheconductivityofsoilofwhichthevalueisequaltotheresistance

measuredattwooppositefacesofunitcubeofsoil.TheunitthereofisΩ·m.

Powerfrequencygroundresistance

2.0.17

Itistheresistancebetweentheearthelectrodeandtheremoteearth，whenthepowerfrequency

currentpassesanearthterminationsystem.Itsvalueisequaltothespecificvaluebetweenthevoltageof

-

theearthterminationsystemtotheremoteearthandthecurrentflowingtotheearthviatheearth

-

electrode.

Commonearthing

2.0.18

Itisanearthingmethodwheredifferentearthingmethods專用forvarioustelecommunication

equipmentsattelecommunicationbureaus（stations），includingworkingearthingoftelecommunication

equipment，protectiveearthing，shieldearthing，staticelectricityprotectionearthing，logicgroundof

informationequipment，andetc.arecombinedwiththeprotectiveearthingofmetalcomponentsof

buildingsandlightningprotectionsystemsandSPD，whichshares，togetherwiththelightning

protectionandearthingsystemofthebuildings，thebasicearthelectrodesandexternalearthingsystems.

Earthelectrode

2.0.19

Itisapieceoragroupofconductor（s）closelycontactingwiththesoil（theearth）toprovidethe

electricalconnectionwiththesoil（theearth），forthepurposeofconnectingtotheearth.

Earthingconnection

2.0.20

Earthingconnectionmeanstheconnectinglinebetweentheearthelectrodeandthemainearthing

bar.

Earthingsystem

2.0.21

Itisacomplexsystemcoveringallelectricconnectionsanddevicesforearthingofsystems，

appliancesandequipment人人文庫，whichincludeearthelectrodesintheearth，earthingconductors，andcable

shieldinglayersconnectedtoearthelectrodes，andequipmentshellsconnectedtoearthelectrodesor

exposedmetalcomponents，rebarsorframesofbuildingsandsoon.

Earthgrid

2.0.22

Itisagroupofearthelectrodescomprisedofbareconductorswhichareinterconnectedintheearth，

forthepurposeofprovidingcommonearthforelectricalequipmentsormetalstructures.

Earthterminationsystem

2.0.23-

Itisanaggregationofearthingconductorsandearthelectrodes.

Equipotentialbonding

2.0.24

Connecttheseparateddevicesandvariousconductiveobjectsusingequipotentialbonding

·3·

conductorsorSPDs，soastoreducethepotentialdifferenceamongthemcausedbylightningcurrent.

Equipotentialbondingnetwork

2.0.25

Itisanetworkcomprisedofequipotentialbondingconductorsbywhichvariousexposed

conductivepartsofonesystemareconnected.

Earthingreferencepoint（ERP）

2.0.26

Itistheonlyoneconnectionpointbetweenthecommonearthingsystemandtheequipotential

bondingnetworkofsystem.

Mainearthingconductor

2.0.27

Itmeansthestripcopperbarorthesteelflatusedastheearthingconductor，whichisusuallyused

asthetrunklineoftheearthingsysteminsidethetelecommunicationbureaus（stations），andby

methodsoflaying，itcanbeclassifiedintothehorizontalmainearthingconductor，theverticalmain

earthingconductor，theringmainearthingconductororthebartypemainearthingconductor.

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Earthingterminal

2.0.28

Itistheconnectionterminalofearthingconductorortheearthingbar.

Earthingbar

2.0.29

Itisconnectedwiththeearthingbus，andusedastherectangularcopperbarforconnection

terminalofvariousearthingconductors.

MainEarthingTerminal（MET）

2.0.30

Itistheearthingbartoconnectvariousearthingconductorswiththe專用earthterminationsystem，and

-

itisalsothefirststageearthingbarofthesystem.

Floorearthingbar（FEB）

2.0.31

Earthingbarsmountedateachfloorinbuildingsareusedforthepurposeofequipotentialbonding

bylocalearthingbars.

Localearthingbar（LEB）

2.0.32

Itistheearthingbarbeingusedinsidetheequipmentroomoftelecommunicationsystemforthe

purposeoflocalequipotentialbonding.

Cableentranceearthingbar（CEEB）

2.0.33

Itisanearthingbartoconnectoutdoorcablesofcableentrancefacilitywithmainearthing

terminalsorringearthelectrodes.

Cableentrancefacility（CEF）

2.0.34

Itisafacilitytoconnectthebuiltinearthingofcablewiththemetalskinforthepurposeof

-

earthing，anditshallbeasclosetotheentranceofoutdoorcableaspossibleaccordingtothepractical

situation.人人文庫

CommonDCreturn（DCC）

2.0.35-

ItisaDCpowersystemwhichallowstheDCreturnconductortohavemultipointconnectionwith

surroundingbondingnetworks.

IsolatedDCreturn（DCI）

2.0.36-

ItisaDCpowersystemwhichallowstheDCreturnconductortohavesinglepointconnectionto

-

BN.

Commonbondingnetwork（CBN）

2.0.37

Itisthemainmethodforconnectionandearthingattelecommunicationbureaus（stations），a

groupofmetalpartswhichareinterconnectedwithspecialintentionorbyaccidentandusedformain

·4·

bondingnetworkofbuildings.

Verticalriser（VR）

2.0.38

Itisagroupofverticalconductorsprovidingalowresistanceengineeringpathbetweenthe

-

telecommunicationequipmentandmainearthingterminals，whichrunthroughverticallytheearthing

trunklinesateachflooroftelecommunicationbureaus（stations）.

Lightningovervoltage

2.0.39-

Itisthetransientovervoltageoccurringatsystemports，whichiscausedbylightningdischarge.

Surgeprotectivedevices（SPD）

2.0.40

SPDsaredevicesusedtoprotectvarioustelecommunicationsystemsattelecommunication

bureaus（stations）incaseoflightningovervoltageoroperationovervoltage.

--

VoltagelimitingtypeSPD

2.0.41

Ingeneral，thevoltagelimitingtypeSPDiscomprisedofmetaloxidevaristorsorsemiconductor

protectiondevices，whichmustbeusedintelecommunicationbureaus（stations）.

Maximumcontinuousoperatingvoltage

2.0.42

Itistheallowablemaximumalternatingvoltage（rms）ordirectvoltagepermanentlyappliedto

SPD.Thevaluethereofisequaltotheratedvoltage.

Residualvoltage

2.0.43

ItisthevoltagepeakbetweenterminalswhenthedischargecurrentflowsthroughSPD.

ResidualvoltageofSPD專用

2.0.44

ItisthemaximumvoltagepeakmeasuredbetweenSPDterminals，whenthesurgevoltagewith

specificwaveformandamplitudeisapplied.

Nominalstartupvoltage

2.0.45-

Itisthestartingvoltageofmetaloxidevaristor，whenaconstant1mAdirectcurrentisapplied.

Nominaldischargecurrent（In）

2.0.46

ItindicatestheindexofSPDdischargecapability，correspondingtothesurgecurrentof8/20μs

simulatedlightningwave.

Maximumdischargecurrent（Imax）

2.0.47

SPDwillnotbesubstantiallydamaged，andeachline（singlemodule）canpassthroughthe

maximumcurrentpeakwithspe