±660kV直流架空输电线路带电作业技术导则-英文版

F24

RecordNo.44815-2014

DL

ElectricPowerIndustryStandardofthePeople'sRepubKcofChina

DL/T1341—2014

TechnicalGuideforLiveWorkingon

±660kVDCTransmissionLine

IssueDate:March18,2014

ImplementationDate:August1,2014

IssuedbyNationalEnergyAdministrationofthePeople'sRepublicofChina

setofelectrostaticprotectiveclothingorconductiveclothing.Ifitisnecessarytodisconnectthedirectlygroundedoverheadgroundwiresfromtheground,theoverheadgroundwiresshallbehungwithearthingcablesbeforemaintenance.

Beforeoverhaulinginthemiddleoftheoverheadgroundwirespan,inordertoensurehis/hersafety,theworkershallcheckwhethertheverticaldistancebetweenhim/herandtheliveconductorsbelowmeetstheminimumworkingdistancerequirementsaftertheoverheadgroundwireintheworklocationisloadedbyhim/her,andwhetherthemechanicalstrengthoftheoverheadgroundwiremeetsrelevantrequirements.

Whenworkingontheuni-polarpower-offside(theotherpoleisrunning),theworkershallwearafullsetofelectrostaticprotectiveclothingorconductiveclothing.

Whenusinginsulatingropestotransferlargemetalobjects,theworkeratgroundpotentialoronthetowershallgroundthemetalobjectsbeforetouchingthem.

Withregardtolargemetalobjects(e.g.automobiles,etc.)insulatedfromthegroundandplacednearstrongelectricfields,attentionshallbepaidtoprotectingpeoplefrominducedelectricalinjury.Themetalobjectsmustbegroundedbeforetheycanbetouched.

5.4Potentialtransfer

Theequipotentialworkershallobtainpermissionfromthepersoninchargeoftheworkbeforepotentialtransferandshallnotlosetheprotectionofthesafetybelt.

ForpotentialtransferofDCtransmissionlines,thepotentialrodshouldbeused,whichshallbeinreliablecontactwithliveconductors.Beforeenteringequipotential,theworkershallcontactthepotentialrodquicklywiththeliveconductorsatadistanceofabout0.4mfromthem.Whenleavingequipotential,theworkershallcontactthepotentialrodwiththeliveconductorsfirst,andthenwithdrawthepotentialrodquicklyafterleavingtheliveconductors0.4maway.

Duringpotentialtransfer,theactionshallbesmooth,accurateandfast.

6Enterorleaveequipotential

Enterorleaveequipotentialonasuspensiontower

Whenenteringorleavingequipotentialonasuspensiontower,theworkershallnotenterorleaveequipotentialverticallyfromthecrossarmsoralongtheinsulatorstrings.Thehangingbasket(hangingchairandhangingladder)method,theinsulatingflexibleladdermethodandothermethodsmaybeusedtoenterandleaveequipotential.

Whentheworkerentersorleavesequipotential,alltheelectricalgapdistances(includingtheworkingdistancesandthecombinedgaps)betweentheworkerandtheearthingconductorsandtheliveconductorsshallmeettherequirementsofTables3andTable4.

Thehangingbaskets(hangingchairsandhangingladders)shallbestablysuspendedbyinsulatingslings,andthemovingspeedshallbestrictlycontrolledbyinsulatingpulleysetstoachieveauniformandslowspeed.Thelengthoftheinsulatingslingsforfixingshallbeaccuratelycalculatedoractuallymeasuredtoensurethatthehighestpartofthehumanbodyshallnotexceedtheupperedgeofthegradingringontheconductorsidewhentheworkerentersorleavesequipotential.

Enterorleaveequipotentialonatensiontower

Whenenteringorleavingequipotentialonatensiontower,theworkermayenterorleaveequipotentialalonghorizontaltensioninsulatorstringsorviaothermethods.

Whentheworkermovesalongthehorizontaltensioninsulatorstrings,thepositionsofhis/herhandsandfeetmustbekeptconsistent,andthenumberofgoodinsulatorsshort-circuitedbythehumanbodyandtoolsshallmeettherequirementsofTable5.

Theworker'ssafetyprotectionropeshallbetiedtotheinsulatorstringheldbyhis/herhandsandshallmovesynchronouslywithhim/her.

Whenenteringorleavingequipotential,theworkershalltransferpotentialwhenmovingtoadistanceofabout0.4m(2~3insulators)fromtheliveconductorsbeforecarryingoutsubsequentoperations.

Alltheelectricalgapdistances(includingtheworkingdistancesandthecombinedgaps)betweentheworkerandtheearthingconductorsandtheliveconductors,andthenumberofgoodinsulatorsshort-circuitedbythehumanbodyortoolsshallmeettherequirementsofTable5.

Mattersneedingattentionatwork

Theworkersshallavoidexcessivebodymovementsduringliveworking.

Insulatingtoolsshallbeusedtotransferarticlesbetweentheequipotentialworkerandthegroundpotentialworker.TheeffectivelengthoftheinsulatingtoolsshallmeettherequirementsofTable2.

Theconductiveclothingshallbefreefromdamageandholes,andallpartsofitshallbeconnectedwellandreliably.Whendamageandburrsarefound,itshallberepairedintime,anditcanbeusedonlyafterpassingthetest.

Beforetheinsulatingtoolsareused,aninsulationresistancetestershallbeusedtoconductsegmentedinsulationtests.Thewidthofthemeasuringelectrodesis2cm,anditisrequiredthattheinsulationresistancebetweenevery2cmofmeasuringelectrodesshallnotbelessthan700MQ.

Theinsulatingtoolsshallbeprotectedfrommoistureandsurfacedamageanddirtwhenused.Theinsulatingtoolstobeusedshallbeplacedonclean,dryandmoisture-proofpads.Whenfounddampenedorsurface-damagedorsurface-dirty,theyshallbehandledintimeandcanbeusedonlyafterpassingthetest.

Duringthework,bearingtoolsshallbefixedandreliableandhavebackupprotection.

Ifdeterioratedorlowresistanceinsulatorsarefoundduringlivetestingofinsulators,theyshallberetested2-3timestoavoidmisjudgment.

Whenthefirstinsulatornearthecrossarmisdismantledorinstalled,itmustbeshort-circuitedbeforeoperation.

Testoftools,devicesandequipment

Thedesignofliveworkingtools,devicesandequipmentshallconformtotherequirementsofGB/T18037.

Conductiveclothing,insulatingropes,insulatingrods,insulatorholders,etc.,shallpasstypetestsandleavingfactorytestsinaccordancewiththerequirementsofGB/T6568,GB/T13035,GB13398,DL/T463,DL/T878.

Thetools,devicesandequipmentshallbesubjectedtoelectricaltestsandmechanicaltestsonaregularbasisaccordingtothetestmethodsofDL/T976.Thetestcyclesareasfollows:

electricaltests.Preventivetestsshallbeconductedonceayear,andinspectiontestsshallbeconductedonceayear,andtheintervalbetweentwotestsshallbehalfayear.

mechanicaltests.Preventivetestsshallbeconductedonceeverytwoyearsforinsulatingtoolsandonceeveryyearformetaltools.

Preventivetests

DCwithstandvoltagetest:theinsulationlengthofthetestsamplebetweenthetestelectrodesshallbe4.8m;thewithstandvoltageshallbe755kV;thetimeshallbe3min.Itisqualifiedifnobreakdown,flashoveroroverheatingoccur.

Switchingimpulsewithstandvoltagetest:theinsulationlengthofthetestsamplebetweenthetestelectrodesshallbe4.8m;thestandardswitchingimpulsewave(+250|is/2500|is)shallbeapplied;thevoltageamplitudeshallbe1325kV;thetestsampleshallwithstand15times.Itisqualifiedifnobreakdownorflashoveroccur.

Staticloadtest:aloadof1.2timestheweightoftheratedworkingloadshallbeappliedforImin.Itisqualifiedifnodeformationordamageoccur.

Dynamicloadtest:3timesofactualoperationsshallbedonewithaloadof1.0timestheweightoftheratedworkingloadapplied.Itisqualifiedifthetoolsareflexible,portableandfreefromjamming.

Inspectiontests

Theinsulatingtoolshallbedividedintoseveralsectionsforpowerfrequencywithstandvoltagetests.Avoltageof75kVshallbeappliedacrossper300mmoftheinsulatingtoolforImin.Itisqualifiedifnobreakdown,flashoverorheatingoccur.

Thewholesetofconductiveclothingshallbefreeofdamage,holesandburrsintheappearanceinspection,andtheconnectingdevicesofallpartsshallbereliableandintact,withgoodconductionafterconnection.

Transportationandstorageoftools,devicesandequipment

Duringtransportation,theinsulatingtools,devicesandequipmentshallbeputintodedicatedtoolbags,toolboxesortoolvehiclestopreventmoistureanddamage.

Holdersandclampswithlowsurfacehardnessandmetaltools(suchasscrewrods)thatshouldnotbebumpedshallbetransportedwithdedicatedwoodenorleathertoolboxes.Thecapacityofeachboxshallbelimitedtoonesetoftools.Scatteredpartsshallbefixedinthebox.

Theinsulatingtools,devicesandequipmentshallbeprotectedfrommoisture,rainandblazingsunduringtransportationandmaintenance.Plasticbagsmaybeusedasinnerpackagingtransportationbags,andcanvasbagsordedicatedleather(canvas)boxesmaybeusedasouterpackagingtransportationbags.

Theliveworkingtools,devicesandequipmentshallbestoredinadedicateddepot,andthedepotforliveworkingtoolsshallmeettherequirementsofDL/T974.

TableofContents

TOC\o"1-5"\h\z

\o"CurrentDocument"

Foreword II

\o"CurrentDocument"

Scope 1

\o"CurrentDocument"

Normativereferences 1

\o"CurrentDocument"

Termsanddefinitions 2

\o"CurrentDocument"

Generalrequirements 2

\o"CurrentDocument"

Technicalrequirements 4

\o"CurrentDocument"

Enterorleaveequipotential 8

\o"CurrentDocument"

Mattersneedingattentionatwork 9

\o"CurrentDocument"

Testoftools,devicesandequipment 9

\o"CurrentDocument"

Transportationandstorageoftools,devicesandequipment 11

TableofContents

Foreword II

Scope 1

Normativereferences 1

Termsanddefinitions 2

\o"CurrentDocument"

Generalrequirements 2

Technicalrequirements 4

Enterorleaveequipotential 8

Mattersneedingattentionatwork 9

Testoftools,devicesandequipment 9

Transportationandstorageoftools,devicesandequipment 11

TableofContents

TOC\o"1-5"\h\z

Foreword II

Scope 1

Normativereferences 1

Termsanddefinitions 2

Generalrequirements 2

Technicalrequirements 4

Enterorleaveequipotential 8

Mattersneedingattentionatwork 9

Testoftools,devicesandequipment 9

Transportationandstorageoftools,devicesandequipment 11

Foreword

ThisstandardwascompiledinaccordancewiththetaskarrangedbyNoticeoftheNationalEnergyAdministrationonIssuingtheFirstBatchofIndustryStandardFormulati()n(Revisi(m)PlansintheEnergySectorin2010(No.320oftheDepartmentofScienceandTechnologyoftheNationalEnergyAdministration).

ThisstandardwasproposedbytheChinaElectricityCouncil.

ThisstandardwaspreparedbytheNationalTechnicalCommitteeofStandardizationforLiveWorking.

Maindraftingorganizationsofthisstandard:ChinaElectricPowerResearchInstitute,StateGridShandongElectricPowerCompany,andStateGridShanxiElectricPowerCompany.

Maindraftersofthisstandard:LIUKai,HUYi,XIAOBin,LIUHongzheng,LIUTing,MENGHailei,YONGJun,NIUBiao,DONGYanwu,LIUYan,PENGYong,andSUZiming.

Duringtheprocessofimplementingthisstandard,relevantopinionsoradvicecanbefedbacktotheStandardizationManagementCenteroftheChinaElectricityCouncil(No.l,Lane2,BaiguangRoad,Beijing,100761).

TechnicalGuideforLiveWorkingon±660kVDCTransmissionLine

Scope

Thisstandardspecifiesthetechnicalrequirementsandmattersneedingattentionforliveworkingon±660kVDCtransmissionlines,aswellasthetest,transportationandstorageoftheworkingtools.

Thisstandardisapplicabletoliveworkingon±660kVDCtransmissionlinesinareaswithanaltitudeof2000mandbelow.

Normativereferences

Thefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.

GB/T2900.55ElectrotechnicalTerminology一LiveWorking(eqvIEC60050—651)

GB/T6568ScreenClothesforLiveWorking(GB/T6568—2008,IEC60895:2002,MOD)

GB/T13035LiveWorking一InsulatingRopes

GB13398InsulatingHollowTubesandFoam-FilledTubesandSolidRodsforLiveWorking

GB/T14286LiveWorking—TerminologyforTools,EquipmentandDevices(GB/T14286—2008,IEC60743:2001,MOD)

GB/T18037TechnicalRequirementsandDesignGuideforLiveWorkingTools

GB26859SafetyCodeofElectricPowerIndustry-PartofElectricLines

DL/T463InsulatorHolderforLiveWorking

DL/T876GuideofInsulationCoordinationforLiveWorking

DL/T878TestGuideoftheInsulatingToolforLiveWorking

DL/T966TechnicalGuideforLiveWorkinginTransmissionLine

DL/T974DepotofToolsforLive-Working

DL/T976PreventiveTestCodeofTools,DevicesandEquipmentforLiveWorking

Termsanddefinitions

Forthepurposesofthisstandard,thetermsanddefinitionsgiveninGB/T2900.55andGB/T14286aswellasthefollowingapply.

liveworkingonDCtransmissionline

live-linerepair,maintenance,andreplacementofpartscarriedoutonDCtransmissionlines

potentialrod

metaltoolusedbyanequipotentialworkerwhenenteringorleavingequipotential,inordertoreducetheimpactofdischargearconthehumanbodyandavoidpossibledamagetoconductiveclothingcausedbypulsedcurrent

electricfieldshieldmask

maskmadeofconductivematerials,usedforelectricfieldprotectionoftheworker'sface,andconnectedwithotherscreentoolsforintegraluse

Generalrequirements

Personnelrequirements

Liveworkingworkersshallbeingoodhealthandfreefromphysicalandpsychologicalobstaclesthathinderwork.Theyshallhaveabasicknowledgeofelectricalprinciplesandpowerlines,masterthebasicprinciplesandoperatingmethodsofliveworking,andbefamiliarwiththescopeofapplicationandusingmethodsoftheworkingtools.TheyshallbefamiliarwithGB26859,DL/T966andthisstandard.Theyshallmasteremergencyrescuemethods,especiallytheelectricshockrescue.Theyshallreceivetheoreticalandoperationaltrainingfromspecializedtraininginstitutions,passrelevantexaminationsandholdrelevantcertificates.

Thepersoninchargeofthework(orthesafetyguardian)shallhaveatleast3yearsofactualworkingexperienceinliveworkingonpowertransmissionlines,befamiliarwithequipmentconditions,havecertainorganizationalcapabilityandaccidenthandlingability,andpasstheexaminationafterspecialtraining.

Institutionalrequirements

AccordingtoGB26859andthisstandard.

Meteorologicalrequirements

Liveworkingshallbecarriedoutingoodweather.Incaseofthunder,rain,snowandfog,liveworkingshallnotbecarriedout.Whenthewindforceisgreaterthanlevel5(lOm/s),liveworkingshouldnotbecarriedout.

Ifliveworkingisrequiredinweatherwithrelativehumiditygreaterthan80%,insulatingtoolswithmoisture-proofperformanceshallbeadopted,andthepossibilityofinsulationdegradationoftheinsulatingtoolsunderhighhumidityshallbeconsidered.

Underspecialoremergentconditions,whenemergentlive-linerepairmustbecarriedoutinharshclimate,relevantengineeringandtechnicalpersonnelandallworkingpersonnelshallbeorganizedtofullydiscussandformulatereliablesafetymeasuresaccordingtothesiteclimateandworkingconditions,andtheemergentlive-linerepaircanbecarriedoutonlyaftertheapprovalofthechiefengineeroftheunitortheleaderinchargeofproductionoftheunit.Sufficientlightingfacilitiesshallbeprovidedfornightwork.

Incaseofasuddenchangeofweatherduringliveworking,whichcanendangerpersonalorequipmentsafety,theworkshallbestoppedimmediately.Undertheconditionofensuringpersonalsafety,thenormalworkingconditionsoftheequipmentshallberestoredassoonaspossibleorotherprotectivemeasuresshallbetaken.

Otherrequirements

Fornewliveworkingprojectsthataremorecomplicatedandmoredifficultandnewdevelopedtools,scientifictestsshallbeconductedtoconfirmsafetyandreliability,andsafetymeasuresandoperationprocessplansshallbeestablished,andthetoolscanbeoperatedonequipmentonlyaftertheapprovalofthechiefengineeroftheunitortheleaderinchargeofproductionoftheunit.

Thepersoninchargeofliveworkingshallcontactthedispatcherbeforetheworkstarts,andtheworkcanbestartedonlyaftercontacting.WhenitisnecessarytodisableDCrestartprotectiondevices,thelicenseformalitiesshallbeperformed.Aftertheworkisfinished,reportingtothedispatchershallbedoneintime.Itisstrictlyprohibitedtostoporresumetherestartprotectiondevicesatanappointedtime.

Technicalrequirements

Groundpotentialworking

Whentheworkerworksatgroundpotential,theminimumworkingdistancebetweentheworkeratgroundpotentialonthetowerandtheliveconductorsshallmeettheprovisionsofTable1.

Table1Minimumworkingdistanceofgroundpotentialworking

Altitude/m

Minimumworkingdistance/m

<500

4.2

500~1000

4.5

1000~1500

4.7

1500~2000

5.0

Note:Thevaluesinthetabledonotincludethespaceoccupiedbythehumanbody,whichshallnotbelessthan0.5mandshallbeconsideredatwork.

Theminimumeffectiveinsulationlengthofinsulatingtools,devicesandequipmentshallmeettheprovisionsofTable2.

Table2Minimumeffectiveinsulationlengthofinsulatingtools,devicesandequipment

Altitude/m

Minimumworkingdistance/m

<500

5.0

500—1000

5.3

1000~1500

5.6

1500~2000

5.9

Barehandworking

Duringbarehandworking,theminimumworkingdistancebetweentheequipotentialworkerandtheearthingconductorsshallmeettheprovisionsofTable3.

Table3Minimumworkingdistanceofbarehandworking

Altitude/m

Minimumworkingdistance/m

Distancebetweentheequipotentialworkerandthesidetowerframe

Distancebetweentheequipotentialworkerandthetopcrossarmorthetopframe

<500

4.2

4.8

500~1000

4.5

5.1

1000~1500

4.7

5.3

1500~2000

5.0

5.6

Note:Thevaluesinthetabledonotincludethespaceoccupiedbythehumanbody,whichshallnotbeless

than0.5mandshallbeconsideredatwork.

Whentheworkerentersorleavesequipotentialviainsulatingtoolsoralonginsulatorstrings,theminimumcombinedgapshallmeettheprovisionsofTable4.

Table4Minimumcombinedgap

Altitude/m

Minimumcombinedgap/m