工业企业电气设备抗震鉴定标准（英文版）

Foreword

ThisstandardisdevelopedbySinopecEngineeringIncorporationincooperationwithotherinvolvedorganizationsaccordingtotherequirementsofDocumentJIANBIAO[2012]No.5issuedbytheMinistryofHousingandUrban-RuralDevelopment(MOHURD)—"NoticeonPrintingandDistributing 'theDevelopmentandRevisionPlanofNationalEngineeringConstructionStandardsin2012'".

Inpreparingthisstandard,thedevelopmentteamcarriedoutextensiveinvestigations,summarizedtheengineeringpractices,madereferencetotheadvancedcodesandstandardsinChinaandabroad,requestedandconsolidatedcommentsfrominvolvedorganizations,reviewedandfinalizedthisstandard.

Thisstandardconsistsof5chaptersand3appendixes,covering:generalprovisions,termsandsymbols,basicrequirements,aseismaticmeasuresappraisalandaseismaticcalculationsetc.

Theprovisionsprintedinboldtypearemandatoryonesandmustbeimplementedstrictly.

Thisstandardisunderthejurisdictionof,anditsmandatoryprovisionsareinterpretedbytheMinistryofHousingandUrban-RuralDevelopmentofthePeople'sRepublicofChina.ChinaPetroChemicalCorporationisresponsibleforitsroutinemanagement,andSinopecEngineeringIncorporationisinchargeoftheexplanationoftechnicalspecifications.Duringimplementationofthisstandard,anycommentsandadvicescanbepostedorpassedontoSinopecEngineeringIncorporation(Address:Bldg.21Anyuan,AnhuiBeiLi,ChaoyangDistrict,Beijing;Postcode:100101).

ChiefDevelopmentOrganization,Co-DevelopmentOrganizations,ParticipatingDevelopmentOrganizations,ChiefDraftersandChiefReviewersofthisstandard:

ChiefDevelopmentOrganization:

SinopecEngineeringIncorporation

Co-DevelopmentOrganizations:

ChinaEarthquakeDisasterPreventionCenter

GuiyangAluminumMagnesiumDesign&.ResearchInstituteCo.,Ltd

AnshanSteelEngineeringTechnologyCorporationLtd.

SinopecPetroleumEngineeringCorporation

ParticipatingDevelopmentOrganizations:

JiangxiTransformerScience&.TechnologyCo.,Ltd.

TianshuiGreatwallSwitchgearCo.,Ltd.

ShengliOilFieldOffshoreElectricalEquipmentCo.,Ltd

ChiefDrafters:

LUBingshiNIZhengliZHAOFengxinDENGShaoqiangSONGGangSUNGuangmingSUNHengzhiYUANXuequnHUXiangquan

ChiefReviewers:

HOUZhongliangGEXueliYAODekangQIUZhenghuaZHANGXiaopengZHAOYongYAXianzhongQIQingZHANGYushanLIXiaobo

JIANGTaoWEITiantaoZHANGWenchengFANJingchangZHUXiaoliWANGQingruCHENShuangzhu

Contents

1Generalprovisions (1)

2Termsandsymbols (2)

2.1Terms (2)

2.2Symbols (2)

3Basicrequirements (4)

4Aseismaticmeasuresappraisal (6)

4.1Powertransformers (6)

4.2Vericalistaledthre-phasereactors (7)

4.3Circuitbreakersandarresters (7)

4.4Capacitorgroups(cabinets) (8)

4.5Electricporcelainequipment (9)

4.6Battery (9)

4.7Panels,cabinets,distributionboxesandGIS (10)

5Aseismaticcalculations (12)

5.1Calculationofearthquakeaction (12)

5.2Floordynamicmagnificationfactor (15)

5.3Powertransormers (15)

5.4Verticallyinstalledthree-phasereactors (19)

5.5Circuibreakesandaresters (21)

AppendixAShock-absorbingmeasuresforelectricalequipment (24)

AppendixB_Aseismaticmeasuresforverticallyinstalledthree-phasereactors (26)

AppendixCCalculationofearthquakeactionofelectricalequipmentonfloor (29)

Explanationofwordinginthisstandard (31)

Listofquotedstandards (32)

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1Generalprovisions

1.0.1Thisstandardisdevelopedforthepurposeofreducingtheearthquakedamagetotheexistingelectricalequipmentintheindustrialplants(hereaftershortenedaselectricalequipment),avoidingpersonnelinjuryanddeath,andloweringeconomiclossaftertheelectricalequipmentisseismicallyqualifiedandaseismaticmeasuresaretakenforattainmentoftheaseismaticprecautionarycriterion.

1.0.2Thisstandardisapplicabletotheaseismaticappraisalandaseismaticmeasurestakenfortheexistingpowertransformers,reactors,circuitbreakers,arresters,currenttransformersandpotentialtransformers,electricporcelainequipment,capacitorgroups(cabinets),batterybanks(cabinets),switchgearcabinets,convertercabinets,controlpanelsandrelaypanels,DCpanels,emergencypowersupplyunits,gasinsulatedswitchgearsandotherelectricalequipmentwithratingvoltageof220kVandbelowintheareaswherethedesignbasicaccelerationofearthquakegroundmotionisnotlargerthan0.40g(i.e.,theaseismaticprecautionaryintensityis9degreeandbelow).

Thisstandardisnotapplicabletotheareaswherethedesignbasicaccelerationofearthquakegroundmotionislargethan0.40gortheexistingelectricalequipmentinindustrialplantsforwhichspecialseismicrequirementsarespecified.

1.0.3Fortheelectricalequipmentthathasbeenseismicallyqualifiedandcorrespondingaseismaticmeasureshavebeentakeninaccordancewiththisstandard,theyshallnotbeseverelydamagedincaseoftheearthquakeintensityequaltoandbelowtheaseismaticprecautionaryintensity,andtheymaycontinuetosupplypowerafterminorrepair.

1.0.4Fortheelectricalequipmentwithoutaseismaticprecautiontakenintheareaswherethedesignbasicaccelerationofearthquakegroundmotionis0.05g(i.e.,theaseismaticprecautionaryintensityis6degree)andabove,theymustbeseismicallyqualifiedandnecessaryaseismaticmeasuresmustbetaken.

1.0.5ThedesignbasicaccelerationofearthquakegroundmotionandaseismaticprecautionaryintensityshallbedeterminedinaccordancewiththecurrentnationalstandardGB18306SeismicGroundMotionParametersZonationMapofChina.Fortheareaswheretheaseismaticprecautionzoningmapshavebeendevelopedortheprojectsitesforwhichseismicsafetyassessmentshavebeen

made,theymaybeseismicallyqualifiedpertheapproveddesignseismicgroundmotionparametersortheaseismaticprecautionaryintensity.

1.0.6Inadditiontotherequirementsstipulatedinthisstandard,thosestipulatedinthecurrentrelevantstandardsofthenationshallbecompliedwith.

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2Termsandsymbols

2.1Terms

2.1.1Aseismaticmeasures

Theprovisionsspecifiedinseismicdesignexceptforcalculationofearthquakeactionandcalculationofresistance,includingtheconstructionalmeasureforearthquakeresistance.

2.1.2Aseismaticprecaution

Theengineeringandnon-engineeringprecautionarymeasurestakenforvariousstructuresagainstthepossibleearthquakehazardbasedonthespecifiedreliabilityrequirements.

2.1.3Aseismaticprecautionarycriterion

Arulethatisusedtomeasuretheaseismaticprecautionaryrequirementsanddeterminedbasedontheaseismaticprecautionaryintensityordesigngroundmotionparametersandaseismaticprecautionarycategoriesofthestructures.

2.1.4Aseismaticprecautionaryintensity

Aseismicintensitythatisapprovedbytherelatednationaladministrationauthoritiesandusedasabasistodeterminetheaseismaticpreeautionaryratingforanarea.Normally,theseismicintensitywitha10%probabilityofexceedancein50yearsistaken.

2.1.5Aseismaticappraisal

Thesafetyassessmentthatismadefortheexistingfacilitiesunderearthquakeactionbyexaminingthedesign,constructionqualityandcurrentstateoftheexistingfacilitiesinaccordancewiththeaseismaticprecautionaryrequirements.

2.1.6Aseismicstrengthening

Theaseismaticdesignandconstructionmadetoenabletheexistingstructurestoattaintheaseismaticqualificationrequirements.

2.1.7Earthquakeaction

Thedynamicactionofthestructureduetoearthquakegroundmotion,includinghorizontalearthquakeactionandverticalearthquakeaction.

2.1.8Earthquakeactioneffect

Theinternalstress(shearstress,bendingmoment,axialstressandtorsionalmoment,etc.)ordeformation(lineardisplacementandangulardisplacement,etc.)ofthestructuregeneratedbytheseismicaction.

2.1.9Designbasicaccelerationofearthquakegroundmotion

Thedesignaccelerationofgroundmotionwitha10%probabilityofexceedancein50years.

2.2Symbols

2.2.1Earthquakeactionandactioneffect:

F—Earthquakeactionoftheelectricalequipment(structure);

m—Massoftheelectricalequipment;

m;—Massconcentratedatmasspointiunderoperatingconditions;

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M—Bendingmoment;

T—Naturalvibrationperiodofthestructure;

Tg—Characteristicperiodofgroundmotion;

σ—Tensile(compression)stress;

t—Shearstress;

g—Accelerationofgravity.

2.2.2Materialperformance

E—Modulusofelasticityofthematerial;

K—Lateralrigidityofthesystem;

σ—Tensile(compression)stress;

t—Shearstress;

[o]—Designallowablestress;

[τ]—Designallowableshearstress.

2.2.3Geometricparameters:

A—Areaofcrosssection;

d—IDofcircumferentialcrosssection;

D—ODofcircumferentialcrosssection;

H—Heightofthestructure;

H—Calculatedheightofmasspointi;

I—Secondaxialmomentofarea;

W—Modulusofsection;

Z—Areamomentofinertia.

2.2.4Thefactorsandcoefficientsusedincalculations:

k—Unbalancefactor;

a—Seismicinfluencefactor;

αm-Maximumseismicinfluencefactor;β—Floordynamicmagnificationfactor;

λ—Rigidityreductioncoefficient;

r—Modalparticipationcoefficient.

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3Basicrequirements

3.0.1Theelectricalequipmentshallbeclassifiedintocriticalelectricalequipmentandgeneralelectricalequipmentbasedonthefollowingrequirements:

1Criticalelectricalequipment:includingtheelectricalequipmentthatisratedinvoltagelevelsof110kVand220kVorusedtosupplypowertothefirstgradeloadsinenterprisesandtheelectricalequipmentthatisrequiredtosecurepowersupplyincaseofearthquake.

2Generalelectricalequipment:includingtheequipmentotherthanthosespecifiedinItem1.

3.0.2Visualexaminationshallbeperformedforaseismaticappraisalofelectricalequipment,andthefollowingrequirementsshallbecompliedwith:

1Theequipmentitselfshallbefreeofanydamage,andtheporcelaininsulatorsshallbefreeofanycrack.

2Theelectricalconnectionsshallbereliable,theboltingshallbeingoodconditions,andthenutsshallnotbeloose.

3Theconnectionsbetweentheequipmentandfoundation/thesupportstructureshallbefirm.

4Theweldsshallbefreeofanycrack,andthemetalpartsshallbefreeofanyseverecorrosion.

5Theequipmentsupportingstructuresandattachmentsshallbefreeofanydeformationordamage.

3.0.3Theseismiceffectmaybecharacterizedbythefollowinggroundmotionparametersforareawheretheelectricalequipmentisinstalled:

1Thedesignbasicaccelerationofearthquakegroundmotionoraseismaticprecautionaryintensity.

2Thecharacteristicperiodofgroundmotion.

3.0.4ThecorrelationbetweendesignbasicaccelerationofearthquakegroundmotionandaseismaticprecautionaryintensityisshowninTable3.0.4.

Table3.0.4Correlationbetweendesignbasicaccelerationofearthquake

groundmotionandaseismaticprecautionaryintensity

Designbasicaccelerationofearthquakegroundmotion

0.05g

0.10g

0.15g

0.20g

0.30g

0.40g

Aseismaticprecautionaryintensity

6

7

8

9

Note:gistheaccelerationofgravity,anditistakenas9.8m/s².

3.0.5Aseismaticcalculationshallbeprovidedforthepowertransformers,verticallyinstalledthree-phasereactorsandarrestors,circuitbreakersandporcelainbushingsforoneofthefollowingcases:

1Theareawherethedesignbasicaccelerationofearthquakegroundmotionis0.20gandabove.

2Theareaswherethedesignbasicaccelerationofearthquakegroundmotionis0.10gand0.15gandthevoltagelevelis110kVand220kV.

3Theareawherethedesignbasicaccelerationofearthquakegroundmotionis0.15gandtheheightoffloororsupportonwhichtheelectricalequipmentisinstalledishigherthan2.0m.

3.0.6Aseismaticcalculationmaynotbeprovidedforthefollowingelectricalequipment;however,

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aseismaticappraisalshallbeprovidedforthefixingmethodsandtheconstructionoftheelectricalequipment,andcorrespondingaseismaticmeasuresshallbetaken.

1Thecapacitorgroups(cabinets),batterybanks(cabinets),switchgearcabinets,convertercabinets,control(relay)panels,DCpanels,emergencypowersupplyunits,gasinsulatedswitchgearsandotherelectricalequipment.

2Theracksusedtoinstalltheelectricalequipment.

3TheelectricalequipmentotherthanthosespecifiedinArticle3.0.5ofthisstandard.

3.0.7Theearthquakeactionofthecriticalelectricalequipmentshallbecalculatedbyonelevelhigherthanthedesignbasicaccelerationofearthquakegroundmotionfortheareawheretheequipmentisinstalled,andtheseismicmeasureshallbeprovidedonelevelhigherthantheaseismaticprecautionaryintensityspecifiedforthisarea.Iftheaseismaticprecautionaryintensityis9degree,thedesignbasicaccelerationofearthquakegroundmotionusedtocalculatetheearthquakeactionmaynotbefurtherincreased,theaseismaticmeasuresmaybeproperlystrengthened.

3.0.8Iftheelectricalequipmentfailstomeettheaseismaticappraisalrequirements,aseismaticmeasuresshallbetakenorshock-absorbingmeasuresshallbetakeninaccordancewithAppendixAofthisstandard.

3.0.9Unlessotherwisespecifiedinthisstandard,thedesignallowablestressusedinaseismaticcalculationforelectricalequipmentshallbeselectedinaccordancewiththefollowingrequirements:

1Thedesignallowablestressforelasticmaterialsmaybe1.4timestheallowablestressofthematerialsatdesigntemperature,butitshallnotbelargerthan0.9timetheyieldstrengthofthematerialsatdesigntemperature.

2Thedesignallowable'stressforbrittlematerialsmaybe1.2timesthedesigntensilestrengthofthematerialsor0.6timethebreakingstressofthematerialsatdesigntemperature.

3.0.10Variouselectricalequipmentshallbereliablyfixedontothefoundation,basesorracks,andtheequipmentanchorboltsorweldingstrengthshallmeettheaseismaticprecautionrequirements.

3.0.11Intheareaswherethedesignbasicaccelerationofearthquakegroundmotionis0.20gandabove,thepowerdistributionequipmentinstalledathighpositionsoronmulti-layersshouldberelocatedonlowerpositionsoraseismaticmeasuresshouldbetaken,andthetubularbusshouldbesuspensioninstalled.

3.0.12Flexibleconductorsshouldbeusedtoconnecttheelectricalequipmentleadwiresandequipment,andproperlengthmarginshallbeprovidedfortheflexibleconductors.Ifrigidbusisusedforconnection,flexiblefittingshallbeprovidedfortransition.

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4Aseismaticmeasuresappraisal

4.1Powertransformers

IGeneralrequirements

4.1.1Thepowertransformersshallincludethetransformersandarcsuppressioncoils.

4.1.2Aseismaticappraisalforpowertransformersshallfocusonexaminationoftheinstallationmethods,theconnectionsbetweentheleadwiresandexternalwires,andthestrengthoftheconservatorracksandtheradiatorcantilevers.

4.1.3Intheareaswheretheaseismaticprecautionaryintensityis7degreeandabove,aseismaticcalculationshallbemadeinaccordancewithChapter5ofthisstandard.

ⅡAseismaticappraisal

4.1.4Aseismaticappraisalfortransformersandarc,suppressioncoilsshallmeetthefollowingrequirements:

1Thetransformerandarcsuppressioncoilshallbesecurelyfixedtothefoundation.

2Flexibleconductoringshallbeprovidedbetweenthetransformerandtheexternalbus.

3Thetransformerconservatorrackshallbefreeofanyvisibledeformation,andshallbesecurelyfixedwiththemainbodyofthetransformerandtheconservator.

4Thecantileverradiatorofthetransformerandtheconnectionsshallbeingoodconditions.

4.1.5Theconnectionpipebetweentheindependentoilcoolerandthemainbodyofthetransformershallbeprovidedwithshut-offvalveandflexiblefittingneartothetransformer.

4.1.6Thepowertransformersinstalledontheelectricpolesshallbeprovidedwithfixingdevices.

ⅢAseismaticmeasures

4.1.7《Ifthetransformersandarcsuppressioncoilsfailtomeettheaseismaticappraisalrequirementsinthissection,aseismaticmeasuresshallbetakeninaccordancewiththefollowingprovisions:

1Inadditiontodisplacementlimitmeasures,thetransformersandarcsuppressioncoilshallbedirectlyboltedorweldedtothefoundation.

2Ifflexibleconductorsareusedforthetransformerbushings,properslackshallbeprovided.Iftheinsulationclearancefailstomeetthespecifiedrequirements,springclampfittingsmaybeused.Ifrigidbusisusedandthesizeofbussectionislargerthan50mm×5mm,flexiblefittingsshallbeprovided.Iftheaseismaticprecautionaryintensityis6degreeor7degree,flexiblefittingsshouldbeprovidedforthepowertransformersof10kVandbelow.Andiftheaseismaticprecautionaryintensityis

8degreeor9degree,flexibleconductorshallbeprovided.

3Thecantileverradiatorofthetransformermaybesupportedbytheanglesteelrackinstalledonthemainbodyofthetransformerorfixedcircularlyaroundtheradiatorbyusingflatsteelstrips.

4.1.8Theconnectionpipebetweentheindependentoilcoolerandthemainbodyofthetransformershallbeprovidedwithshutoffvalveandflexiblefittingneartothetransformer,andthedistancefromtheradiator,oil-submergedpumpandconnectionpipetothefoundationshallnotbelessthan200mm.

4.1.9Thebottomoftransformersinstalledonelectricpoleshallbeboltedtothelowerbeam.Intheareawheretheaseismaticprecautionaryintensityis8degreeandabove,fixingdevicesshouldbealso

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providedbetweentheupperportionofthetransformerandtheelectricpole.

4.2Verticallyinstalledthree-phasereactors

IGeneralrequirements

4.2.1Verticallyinstalledthree-phasereactorsshallincludeverticallyinstalledthree-phasecementreactorsandverticallyinstalledthree-phasedryhollowcorereactors.

4.2.2Aseismaticappraisalforverticallyinstalledthree-phasereactorsshallfocusontheexaminationofthereactormodelsandinstallationmethods.

4.2.3Aseismaticcalculationsshallbemadefortheverticallyinstalledthree-phasecementreactorsusedintheareaswheretheaseismaticprecautionaryintensityis7degreeandaboveandtheverticallyinstalledthree-phasedryhollowcorereactorsusedintheareaswheretheaseismaticprecautionaryintensityis8degreeandaboveinaccordancewithChapter5ofthisstandard.

ⅡAseismatieappraisal

4.2.4Theaseismaticappraisalforverticallyinstalledthree-phasereactorsshallmeetthefollowingrequirements:

1Verticallyinstalledthree-phasereactorsshouldbedryhollowcorereactors.

2Three-phasereactorsshouldbehorizontallyinstalled.

ⅢAseismaticmeasures

4.2.5Iftheverticallyinstalledthree-phasereactorsfailtomeettheaseismaticappraisalrequirementsinthissection,aseismaticmeasuresshallbetakeninaccordancewiththefollowingprovisions:

1Intheareaswheretheaseismaticprecautionaryintensityis6degreeor7degree,theverticallyinstalledthree-phasecementreactorsshouldbechangedfodryhollowcorereactors,andintheareaswheretheaseismaticprecautionaryintensityisin8degreeor9degree,theverticallyinstalledthree-phasecementreactorsshallbechangedtodryhollowcorereactors.

2Verticallyinstalledthree-phasereactorsshouldbechangedtohorizontallyinstalledreactorswheresiteconditionspermit.

4.2.6Fortheverticallyinstalledthree-phasedryair-corereactorsusedintheareaswheretheaseismaticprecautionaryintensityis8degreeandaboveandtheverticallyinstalledthree-phasecementreactors,iftheiraseismaticcalculationfailtomeettheaseismaticappraisalrequirements,seismicstrengtheningmaybemadeinaccordancewithAppendixBofthisstandard.

4.2.7Forthesupportingporcelaininsulatorsoftheverticallyinstalledthree-phasedryair-corereactorsintheareaswheretheaseismaticprecautionaryintensityis7degreeandbeloworforthesupportingporcelaininsulatorsofthehorizontallyinstalledthree-phasecementreactors,iftheiraseismaticcalculationfailtomeettheaseismaticappraisalrequirements,suchsupportingporcelaininsulatorsshallbereplacedwiththeinsulatorsinhigherstrength.

4.3Circuitbreakersandarresters

IGeneralrequirements

4.3.1Thecircuitbreakersandthearrestersincludeindependentcircuitbreakers,freestandingarrestersandtie-rodarresters.

4.3.2Aseismaticappraisalforthecircuitbreakersandthearrestersshallfocusontheexaminationoftheporcelaininsulators,theconnectionsbetweenporcelaininsulatorsandflanges,andthestrengthoftie-

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rodandexternalconductorsateachdirection.

4.3.3Intheareaswheretheaseismaticprecautionaryintensityis7degreeandabove,thecircuitbreakersandthearrestersshallbeseismicallycalculatedinaccordancewithChapter5ofthisstandard.

ⅡAseismaticappraisal

4.3.4Aseismaticappraisalforthecircuitbreakersandthearrestersshallmeetthefollowingrequirements:

1Theporcelaininsulatorsofthecircuitbreakersandthearrestersshallbeingoodconditions.

2Theporcelaininsulatorsandtheflangesshallbefirmlyattached.

3Thebasesandintermediateflangesofthecircuitbreakersandthearrestersshallbeingoodconditions,andthenutsshallnotbeloose.

4Theexternalconductorsofthecircuitbreakersandthearrestersshallbeflexibleconductororprovidedwithflexiblefittings.

4.3.5Forthearrestersprovidedwithinsulatedtie-rods,thestrengthofthetie-rodsateachdirectionshallbeuniform.

ⅢAseismaticmeasures

4.3.6Ifthecircuitbreakersandthearrestersfailtomeettheaseismaticappraisalrequirementsspecifiedinthissection,aseismaticprecautionmeasuresshallbetakeninaccordancewiththefollowingrequirementsorshock-absorbingmeasuresshallbetakeninaccordancewithAppendixAofthisstandard.

1Thedamagedorcrackedporcelaininsulatorsofthecircuitbreakersandthearrestersshallbereplacedwithgoodporcelaininsulators.

2Theboltsusedtofixtheporcelaininsulatorandtheflangeshallbetightened.

3Ifthebasesandintermediateflangesofthecircuifbreakersandthearrestersarecorroded,rustshallberemovedandnutsshallbetightened.

4Ifrigidbusortubularbusisusedastheexternalconductorsforthecircuitbreakersandthearresters,flexibleconductororflexiblefittingsshallbeprovided.

4.3.7Forthearresterswithinsulatedtie-rods,thestrengthofthetie-rodsateachdirectionshallbeuniform.Iftheinsulatedtie-rodsaredamagedorfailtomeetthestrengthrequirements,theyshallbereplaced.

4.4Capacitorgroups(cabinets)

IGeneralrequirements

4.4.1Thecapacitorgroups(cabinets)shallincludethecapacitorsinstalledontheracks,ontheground,inside/outsidethecabinets,individuallyinstalledorgroupinstalled.

4.4.2Aseismaticappraisalforcapacitorgroups(cabinets)shallfocusonexaminationoftheinstallationmethodsandtheconnectionwithexternalconductors.

4.4.3Aseismaticcalculationmaynotbeprovidedforthecapacitorgroups(cabinets).

ⅡAseismaticappraisal

4.4.4Theaseismaticappraisalforcapacitorgroups(cabinets)shallmeetthefollowingrequirements:

1Thecapacitorgroups(cabinets)shallbesecurelyfixedtothefoundation.

2Theleadwiresofcapacitorsshouldbeflexibleconductors.

ⅢAseismaticmeasures

4.4.5Ifthecapacitorgroups(cabinets)failtomeettheaseismaticappraisalrequirementsspecifiedin

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thissection,aseismaticmeasuresshallbetakeninaccordancewiththefollowingprovisions:

1Thebasesofthecapacitorgroups(cabinets)shallbesecurelyfixedtothesupportingstructuresbyusinganchorbolts.

2Hardconductorsshouldnotbeusedastheleadwiresofthecapacitors,andhardconductorsshallbeprovidedwithflexiblefittingsorreplacedwithflexibleconductorsinthecasethattheaseismaticprecautionaryintensityis7degreeto9degree.

4.5Electricporcelainequipment

IGeneralrequirements

4.5.1Theelectricporcelainequipmentincludetheelectricalequipmentforwhichporcelaininsulatorsaretheirmainparts,butexcludethecircuitbreakersandthearresters.

4.5.2Theaseismaticappraisalforelectricporcelainequipmentshallfocusonexaminationoftheinstallationmethods,theconnectionsofporcelaininsulatorsandthetypesofporcelaininsulators.

4.5.3Aseismaticcalculationmaynotbeprovidedfortheelectricporcelainequipment.

ⅡAseismaticappraisal

4.5.4Theaseismaticappraisalforelectricporcelainequipmentshallmeetthefollowingrequirements:

1Intheareaswheretheaseismaticprecautionaryintensityis7degreeandabove,theporcelaininsulatorsshouldbehighstrengthtype.

2TheleadwiresofHVelectricporcelainequipmentshouldbeflexibleconductors.

3Intheareaswhereaseismaticlprecautionaryintensityis8degreeor9degree,HVelectricporcelainequipmentwithvoltageratingof110kVandaboveshallbearrangedatlowpositionsorinmono-layer.

4Thebasesofcurrent(potential)transformersshallbesecurelyfixedtothefoundations.

ⅢAseismaticmeasures

4.5.5Iftheelectricporcelainequipmentfailstomeettheaseismaticappraisalrequirementsspecifiedinthissection,aseismaticmeasuresshallbetakeninaccordancewiththefollowingprovisions:

1Int