Exicircuitsbi德和盛油氣站防雷講座

KonferenzJurata2009Surgeprotectionforintrinsicallysafecircuits本質(zhì)安全電路電涌保護(hù)www.dehn.de編輯pptKonferenzJurata2009Acircuitisintrinsicallysafeifnosparkandthermaleffect,whichoccurunderdefinedexperimentalconditions(includingnormaloperationandcertainfaultconditions),canigniteacertainexplosiveatmosphere.如果一個電路在某實驗條件下(包括正常工作和故障情形),不會產(chǎn)生能導(dǎo)致爆炸氣體點火的閃絡(luò)和溫度變化,這樣的電路是本質(zhì)安全的.Measuringandcontroltechnology,communicationtechnology測控技術(shù),通信技術(shù)Basicprinciple:/基本原則Application:/應(yīng)用Intrinsicsafety

ExiinaccordancewithEN60079-11,2007-01

本質(zhì)安全電路EXi,根據(jù)EN60079-11,2007-01編輯pptKonferenzJurata2009

“Lightningisnotintrinsically

safe!!!“

雷擊不是本質(zhì)安全

編輯pptKonferenzJurata20091.Lightningasanignitionsource

/雷擊為點火源一種

2.Lightningprotectionsystemsinaccordancewith

EN62305inhazardousareas

根據(jù)62305危險區(qū)域防雷系統(tǒng)3.Designofintrinsicallysafecircuits

本質(zhì)安全電路設(shè)計4.Selectionofsurgeprotectivedevices

電涌保護(hù)器選型a)withgalvanicisolation

/電隔離b)withoutgalvanicisolation/非電隔離編輯pptKonferenzJurata20091.Lightningasanignitionsource

/雷擊為點火源一種

2.Lightningprotectionsystemsinaccordancewith

EN62305inhazardousareas

根據(jù)62305危險區(qū)域防雷系統(tǒng)3.Designofintrinsicallysafecircuits

本質(zhì)安全電路設(shè)計4.Selectionofsurgeprotectivedevices

電涌保護(hù)器選型a)withgalvanicisolation

/電隔離b)withoutgalvanicisolation/非電隔離編輯pptKonferenzJurata2009EN1127-1:2007“Explosiveatmospheres-Explosionprevention

andprotection-Part1:Basicconceptsandmethodology“EN1127-1:2007“爆炸環(huán)境-防爆及保護(hù)-第1部分:基本概念及方法Thefollowingpossibleignitionsourcesarespecifiedinthestandard:標(biāo)準(zhǔn)中列舉了以下可能的點火源:

-Flamesandhotgases/明火及高溫氣體 -Hotsurfaces

/高溫表面 -Mechanicallygeneratedsparks/機械引起的火星 -Elecricalapparatus

/電器設(shè)備 -Strayelectriccurrents

/雜散電流 -Staticelectricity/靜電

-Lightning/雷擊 -Electromagneticwaves/電磁波

-Ionisingradiation

/離子輻射 -Ultrasonics/超音波編輯pptKonferenzJurata2009Controlroom

/控制室LookingforSourcesofIgnitions

確定點火源Non-hazardousareaHazardousarea/危險區(qū)域1IN2I.S.Barrier/安全柵explosion

protection

zone0防爆分區(qū)0explosion

protection

zone1,2防爆分區(qū)1,2S1編輯pptKonferenzJurata2009Controlroom/控制室LookingforSourcesofIgnitions

確定點火源Non-hazardousareaHazardousarea

/危險區(qū)域1IN2I.S.Barrier/安全柵explosion

protection

zone0防爆分區(qū)0explosion

protection

zone1,2防爆分區(qū)1,2S1編輯pptKonferenzJurata2009Controlroom

/控制室LookingforSourcesofIgnitions

確定點火源Non-hazardousareaHazardousarea/危險區(qū)域1IN2I.S.Barrier/安全柵explosion

protection

zone0防爆分區(qū)0explosion

protection

zone1,2防爆分區(qū)1,2S1編輯pptKonferenzJurata2009Controlroom/控制室LookingforSourcesofIgnitions

確定點火源Non-hazardousareaHazardousarea/危險區(qū)域1IN2I.S.Barrier/安全柵explosion

protection

zone0防爆分區(qū)0explosion

protection

zone1,2防爆分區(qū)1,2

S1編輯pptKonferenzJurata2009Explosionpreventionandprotection,BasicconceptsandmethodologyDINEN1127-1,2007

EN1127-1:2007“爆炸環(huán)境-防爆及保護(hù)-第1部分:基本概念及方法5Elementsofriskassessment風(fēng)險評估要素5.3.8Lightning雷擊Iflightning

strikesinanexplosiveatmosphere,ignitionwillalwaysoccur.Moreover,thereisalsoapossibilityofignitionduetothehightemperaturereachedbylightningconductors.

如果雷電擊中爆燃性氣體,點火總是不可避免會發(fā)生.而且,雷擊導(dǎo)體上產(chǎn)生的高溫，其導(dǎo)致點火的可能性始終存在.Largecurrentsflowfromwherethelightningstrikesandthesecurrentscanproducesparksinthevicinityofthepointofimpact.

當(dāng)大電流流過時,同樣會在相鄰接點之間產(chǎn)生跳火.編輯pptKonferenzJurata2009Explosionpreventionandprotection,BasicconceptsandmethodologyDINEN1127-1,2007

EN1127-1:2007“爆炸環(huán)境-防爆及保護(hù)-第1部分:基本概念及方法5Elementsofriskassessment風(fēng)險評估要素5.3.8Lightning雷擊Evenintheabsenceoflightningstrikes,thunderstormscancausehighinducedvoltagesinequipment,protectivesystemsandcomponents.

即使沒有雷擊,

雷暴也會在設(shè)備,保護(hù)系統(tǒng)和器件上產(chǎn)生很高的感應(yīng)電壓Forprotectivemeasuresagainstignitionhazardsduetolightning,

see6.4.8.

雷擊點火危害的防護(hù)措施詳見6.4.8編輯pptKonferenzJurata2009Lightningasanignitionsourceinaccordancewith

EN1127-1(6.4.8)

根據(jù)EN1127-1(6.4.8)雷擊作為點火源Ifhazardsduetolightninghavebeenidentified,thefollowingspecificrequirementsforequipment,protectivesystemsandcomponentsshallbecompliedwith:Allcategories:Installationsshall

beprotectedbytheappropriatelightningprotectionmeasures.如果雷擊導(dǎo)致的危害能確定,緊隨的對設(shè)備,保護(hù)系統(tǒng)和器件的詳細(xì)需求要符合:所有類別:裝置需受適當(dāng)?shù)姆览状胧┍Ｗo(hù).Theeffectsoflightningoccurringoutsidezones0and20fromdamagingzones0and20shallbeprevented,e.g.overvoltageprotectionsystemscouldbeinstalledatappropriateplaces.雷擊發(fā)生在0區(qū)和20區(qū)且?guī)淼膿p害必須被避免,如過電壓保護(hù)系統(tǒng)可安裝在適當(dāng)?shù)奈恢?編輯pptKonferenzJurata2009Lightningasanignitionsourceinaccordancewith

EN1127-1(6.4.8)

根據(jù)EN1127-1(6.4.8)雷擊作為點火源Theserequirementsshallbeincludedintheinformationforuse

(seesection7).Protectivemeasuresagainstlightningshallnotimpaircathodiccorrosionprotection/Eximeasures.這些需求應(yīng)被包括在應(yīng)用信息中(見第7節(jié))防雷措施不應(yīng)該削弱陰極防腐保護(hù)措施.編輯pptKonferenzJurata20091.Lightningasanignitionsource

/雷擊為點火源一種

2.Lightningprotectionsystemsinaccordancewith

EN62305inhazardousareas

根據(jù)62305危險區(qū)域防雷系統(tǒng)3.Designofintrinsicallysafecircuits

本質(zhì)安全電路設(shè)計4.Selectionofsurgeprotectivedevices

電涌保護(hù)器選型a)withgalvanicisolation

/電隔離b)withoutgalvanicisolation/非電隔離編輯pptKonferenzJurata2009control

room控制室Lightningandsurgeprotectioninaccordancewith

EN62305

雷擊及電涌保護(hù),根據(jù)EN62305Non-hazardousareaHazardousareameasuringand

controlcircuitEx(i)危險區(qū)域測控電路3OUT41IN2BLITZDUCTORCTexplosion

protection

zone0防爆分區(qū)0explosion

protection

zone1,2防爆分區(qū)1,2min.4mm2BLITZDUCTOR?BXTBASEX,BXTML4...EXLPZ2LPZ1LPZ1LPZ0ADEHNpipe

DPIMDEX24M2RExLPZ0B編輯pptKonferenzJurata2009control

room控制室Lightningandsurgeprotectioninaccordancewith

EN62305

雷擊及電涌保護(hù),根據(jù)EN62305Non-hazardousarea3OUT41IN2BLITZDUCTORCTexplosion

protection

zone0防爆分區(qū)0explosion

protection

zone1,2防爆分區(qū)1,2min.4mm2BLITZDUCTOR?BXTBASEX,BXTML4...EXLPZ2LPZ1LPZ1LPZ0ADEHNpipe

DPIMDEX24M2RExLPZ0BS1Hazardousareameasuringand

controlcircuitEx(i)危險區(qū)域測控電路編輯pptKonferenzJurata20091.Lightningasanignitionsource

/雷擊為點火源一種

2.Lightningprotectionsystemsinaccordancewith

EN62305inhazardousareas

根據(jù)62305危險區(qū)域防雷系統(tǒng)3.Designofintrinsicallysafecircuits

本質(zhì)安全電路設(shè)計4.Selectionofsurgeprotectivedevices

電涌保護(hù)器選型a)withgalvanicisolation

/電隔離b)withoutgalvanicisolation/非電隔離編輯pptKonferenzJurata2009Intrinsicsafety

ExiinaccordancewithEN60079-11,2007-01

根據(jù)EN60079-11,2007-01本質(zhì)安全EXiSafetybarriersarepassivenetworkswhichisolateintrinsicallysafecircuitsfromnon-intrinsicallysafecircuitswithoutgalvanicisolation.Theinstallationofsafetybarriersallowstousestandardinstrumentationandinstallationinthenon-intrinsicallysafecircuit.However,voltagesmustnotexceed250V.Amajordrawbackofthissafetybarrierisitsrelativelyhighohmicresistancewhichhastobeconsideredforlinecompensation.Safetybarriersarealwaysinstalledoutsidehazardousareas.安全柵為無源網(wǎng)絡(luò),用來隔離本質(zhì)安全電路和非本質(zhì)安全電路,通過非電氣隔離的方式.允許使用標(biāo)準(zhǔn)儀表并安裝在非本質(zhì)安全電路中.但是,其電壓不能超過250V,且本身的高阻性的弱點在線路補償中必須被考慮.通常安全柵都安裝在危險區(qū)域外圍.Blockdiagramofasafetybarrier/安全柵電路圖編輯pptKonferenzJurata2009Onlysafetybarrierswithgalvanicisolationcanbeusedforhazardouszone0.

Earthconnectionofintrinsicallyequipmentundernormaloperatingconditionsispermitted.

Differentearthpotentialswillnotcausemeasurementerrors.Theintrinsicallycircuitandthemeasuringinstrumentcanhavedifferentpotentials.

Installationtimeisreducedsinceequipotentialbondingisnotrequired.只有帶電隔離的安全柵才能被應(yīng)用在危險分區(qū)0.允許正常工作條件下本質(zhì)設(shè)備的接地連接.不同的地電勢不會導(dǎo)致測量誤差.本質(zhì)電路和測量設(shè)備可具有不同的電勢.由于不再需要等電位連接,安裝時間大大減少.Blockdiagramofasafetybarrierwithgalvanicisolation/帶電隔離的安全柵電路圖Intrinsicsafety

ExiinaccordancewithEN60079-11,2007-01

根據(jù)EN60079-11,2007-01本質(zhì)安全EXi編輯pptKonferenzJurata2009Intrinsicsafety

ExiinaccordancewithEN60079-11,2007-01

根據(jù)EN60079-11,2007-01本質(zhì)安全EXiIsolationfromintrinsicallysafeelectricequipment

/本質(zhì)安全電氣設(shè)備的隔離Isolationhastobeensured:/隔離必須被確保:betweentheintrinsicallysafecircuitandthechassis;本質(zhì)安全電路與底座之間

a.c.testvoltageofatleast500Vrms,1min.

交流測試電壓至少為500V,持續(xù)1分鐘betweentheintrinsicallysafeandnon-intrinsicallysafecircuit;本質(zhì)安全和非本質(zhì)安全電路之間

a.c.testvoltageofatleast1500Vrms,1min.交流測試電壓至少為1500V,持續(xù)1分鐘Hazardousarea/危險區(qū)域 Non-hazardousarea

/非危險區(qū)域Resistancethermometer(enlarged)阻性溫度計Transducer(associatedequipment)變送器(關(guān)聯(lián)設(shè)備)編輯pptKonferenzJurata20091.Lightningasanignitionsource

/雷擊為點火源一種

2.Lightningprotectionsystemsinaccordancewith

EN62305inhazardousareas

根據(jù)62305危險區(qū)域防雷系統(tǒng)3.Designofintrinsicallysafecircuits

本質(zhì)安全電路設(shè)計4.Selectionofsurgeprotectivedevices

電涌保護(hù)器選型a)withgalvanicisolation

/電隔離b)withoutgalvanicisolation/非電隔離編輯pptKonferenzJurata2009Minimumdischargecapacityof10impulseswith10kA(8/20μs)eachwithoutreducingornegativelyaffectingtheprotectivefunction.

最少10個沖擊,每次放電電流10kA(8/20μs),沖擊后保護(hù)功能不會降低或者劣化.InstallationoftheSPDintoametalhousingandearthingofmin.4mm2CuSPD應(yīng)安裝在金屬箱體內(nèi)且接地線至少為4mm2銅線.Selectionofsurgeprotectivedevices

RequirementsinaccordancewithEN60079-14

根據(jù)EN60079-14電涌保護(hù)器需求及選型

InstallationoftheconductorbetweenSPDandequipmentinthemetalpipewhichisearthedatbothendsoruseofshieldedconductorswithalengthofmax.1mSPD和金屬管道內(nèi)的設(shè)備導(dǎo)線兩端應(yīng)接地或采用最長不超過1米的屏蔽線.編輯pptKonferenzJurata2009Isolationfromearthoftheintrinsicallysafeequipment?

本質(zhì)安全設(shè)備是否對地隔離?Typeofprotection-Categoryiaorib?

防護(hù)類別-ia或ib?CompliancewiththemaximumpermissiblevaluesforLoandCo

是否滿足最大允許的電感電容值?CompliancewiththemaximumvaluesforU0andI0

是否滿足電壓和電流的最大值?Energycoordinationofsurgeprotectivedeviceandterminalequipment

電涌保護(hù)器與終端設(shè)備是否能量協(xié)調(diào)?Selectionofsurgeprotectivedevices

RequirementsinaccordancewithEN60079-14

根據(jù)EN60079-14電涌保護(hù)器需求及選型

編輯pptKonferenzJurata2009automationdevice自動化設(shè)備safetybarrier/安全柵Non-hazardousarea/非危險區(qū)域Transducer變送器Safetybarrierwithgalvanicisolation

Isolationfromearth

與地電隔離的安全柵Hazardousarea/危險區(qū)域編輯pptKonferenzJurata2009BLITZDUCTOR?XTBXTML4BDEX30

Isolationfromearthensured!

BXTML4BDEX30,確保對地隔離Power-frequencyvoltagestrength>=500V工頻電壓強度>=500V(1)(2)(1‘)(2‘)(PA)編輯pptKonferenzJurata2009(1)(2)(PA)SafetybarrierwithgalvanicisolationProtectionwithBlitzductorXTBXTML4BDEX30電隔離保護(hù)的安全柵1‘2‘12BLITZDUCTORXTPA(1‘)(2‘)isolatorSignal信號編輯pptKonferenzJurata2009Non-hazardousareaHazardousareameasuringand

controlcircuitEx(i)BDEXTrSe1‘2‘12BDEX121‘2‘signalline/信號線BLITZDUCTOR?XTBLITZDUCTOR?XTsensor1)傳感器intermeshedearth-terminationsystem/網(wǎng)格接地系統(tǒng)

1) Insulationstrength>500Va.c. Ensureconsistentequipotenitalbondingandintermeshing

絕緣強度>500V,在保證良好的等電位連接和網(wǎng)格接地情況下.Summary:

InstallationofsurgeprotectivedevicesEx(i)

總結(jié):本安型電涌保護(hù)器安裝safety

barrier1)安全柵編輯pptKonferenzJurata2009Exampleofuse:BXTML4BDEX30,installationintoaswitchgearcabinet

應(yīng)用舉例:BXTML4BD3X30,安裝在開關(guān)柜內(nèi)Source:TALPipelineFISCOcertificationCertificateofconformityKEMA06ATEX0274XII2(1)GEExiaIICT4/T5/T6編輯pptKonferenzJurata2009Exampleofuse:

BXTML4BDEX30,Installationintoametalhousing

應(yīng)用舉例:BXTML4BDEX30,安裝在金屬箱體內(nèi)FISCOcertificationCertificateofconformityKEMA06ATEX0274XII2(1)GEExiaIICT4/T5/T6編輯pptKonferenzJurata2009FISCOcertificationforintrinsicallysafecircuits本質(zhì)安全電路應(yīng)用CertificateofconformityPTB03ATEX2088II2(1)GEExiaIICT4/T5/T6Exampleofuse:

DPIMDEX24M2,Installationintoametalpipe

應(yīng)用舉例:DPIMDEX24M2,安裝在金屬管道內(nèi)編輯pptKonferenzJurata20091.Lightningasanignitionsource

/雷擊為點火源一種

2.Lightningprotectionsystemsinaccordancewith

EN62305inhazardousareas

根據(jù)62305危險區(qū)域防雷系統(tǒng)3.Designofintrinsicallysafecircuits

本質(zhì)安全電路設(shè)計4.Selectionofsurgeprotectivedevices

電涌保護(hù)器選型a)withgalvanicisolation

/電隔離b)withoutgalvanicisolation/非電隔離編輯pptKonferenzJurata2009Hazardousarea

Non-hazardousareaTransducer

/變送器casting

compoundUZRSIOUOUNautomationdevice自動化設(shè)備PASafetybarrierwithoutgalvanicisolationEarth-bound

非電隔離并接地的安全柵safetybarrier/安全柵危險區(qū)域

非危險區(qū)域編輯pptKonferenzJurata2009Isolationfromearthoftheintrinsicallysafeequipment?

本質(zhì)安全設(shè)備是否對地隔離?Typeofprotection-Categoryiaorib?

防護(hù)類別–ia或ib?CompliancewiththemaximumpermissiblevaluesforLoandCo

是否滿足最大允許的電感電容值?CompliancewiththemaximumvaluesforU0andI0

是否滿足電壓和電流的最大值?Energycoordinationofsurgeprotectivedeviceandterminalequipment

電涌保護(hù)器和終端設(shè)備是否能量協(xié)調(diào)?Selectionofsurgeprotectivedevices

RequirementsinaccordancewithEN60079-14

根據(jù)EN60079-14電涌