Yog tias koj tab tom qhia txog lub teeb ntes hluav taws xob rau qhov nruab nrab -voltage network, thawj lo lus nug uas feem ntau tshwm sim yog yooj yim txaus: Kuv puas xav tau 11kV chav tsev lossis 33kV ib qho? Cov lus teb zoo li pom tseeb, tab sis cov txheej txheem xaiv yog qhov yooj yim dua li qhov sib piv cov ntawv ntes rau koj qhov system voltage. Tau txais nws tsis ncaj ncees lawm thiab koj tab tom saib cov cuab yeej uas tsis tuaj yeem tiv thaiv lossis, phem dua, ua thaum nws tsis tsim nyog.
Cov lus qhia no taug kev los ntawm qhov sib txawv tiag tiag ntawm 11kV thiab 33kV cov neeg ntes, suav nrog kev ntsuas hluav taws xob, kev xav tau hauv av, chav ntes neeg, thiab cov lus qhia tshwj xeeb uas tseem ceeb thaum koj txiav txim siab yuav khoom.
Xob Laim Arrester
Quick Reference Table
| Parameter | 11 kV System | 33kV System |
|---|---|---|
| Tej yam hauv av | Lub hnub qub (solidly earthed) | Tsis yog - zoo earthed (delta) |
| Pom zoo Rated Voltage (Ur) | 9kv ua | 36kV rau 42kV |
| MCOV | ~ 7.65 kV | ~ 29kV rau 34kV |
| Tshem tawm qhov ntsuas tam sim no | 10 kA | 10 kA |
| Arrester Class | Distribution Class | Chaw nres tsheb Class |
| BIL | 75kv ua | 1 70kv |
| Txuj | IEC 60099-4: Tus Qauv Zauv | IEC 60099-4: Tus Qauv Zauv |
Qhov feem ntau cov neeg tau yuam kev: Nws yog hais txog av, tsis yog Voltage xwb
Nov yog qee yam uas ua rau muaj ntau tus kws tshaj lij: qhov ntsuas hluav taws xob ntawm cov hluav taws xob ntes tsis zoo ib yam li qhov system voltage. Tus naj npawb koj xaiv nyob ntawm qhov hnyav npaum li cas koj lub network yog earthed, thiab qhov ntawd yog qhov twg 11kV thiab 33kV systems nyiam coj txawv txawv.
Feem ntau 11kV tes hauj lwm yog cov av sib koom ua ke. Lub transformer lub hnub qub taw tes yog txuas ncaj qha mus rau hauv av, uas txhais tau hais tias thaum lub sij hawm ib zaug -phase txhaum, qhov voltage ntawm ob theem nyob twj ywm ruaj khov, nce mus rau tsis pub ntau tshaj li 80% ntawm cov kab - mus rau - kab voltage. Vim li ntawd, engineers feem ntau loj tus neeg ntes ntawm 0.8 npaug ntawm qhov system voltage. Rau 11kV network, uas ua haujlwm tawm mus rau qhov ntsuas hluav taws xob ntawm ib ncig ntawm 9kV. Nws yog ib qho kev xam ncaj nraim, thiab cov cuab yeej ua tau yog compact, tus nqi - zoo, thiab zoo - haum rau kev faib tawm - qib tiv thaiv.11KV xob laim Arresterlos ntawm Victory Electric, piv txwv li, yog tsim kom meej nyob ib ncig ntawm qhov kev faib tawm no -chav kawm specification, nrog ib tug polymer vaj tse thiab zinc oxide varistor pawg optimized rau qhov chaw ua hauj lwm.
33kV tshuab yog qhov sib txawv kiag li. Ib feem loj ntawm 33kV tes hauj lwm, tshwj xeeb tshaj yog nyob rau hauv Asia, Africa, thiab cov teb chaws Europe, siv delta - txuas transformer windings. Delta windings tsis muaj qhov nruab nrab, yog li tsis muaj txoj hauv kev ncaj nraim rau lub ntiaj teb. Thaum muaj kev txhaum tshwm sim ntawm ib theem, qhov voltage ntawm cov theem noj qab haus huv tuaj yeem nce mus rau tag nrho cov kab hluav taws xob, qee zaum siab dua me ntsis. Qhov ntawd txhais tau hais tias tus neeg ntes yuav tsum tau ntsuas los ua qhov ntawd tsis tu ncua, thiab 0.8 tus lej sib npaug tsis siv ntxiv lawm. Hloov chaw, qhov ntsuas hluav taws xob tau teeb tsa ntawm 100% ntawm qhov system voltage lossis siab dua, uas yog vim li cas 33kV cov neeg ntes feem ntau nqa qhov ntsuas ntawm 36kV txog 42kV nyob ntawm qhov chaw siv hluav taws xob nyiam kev nyab xeeb.
Siv 11kV xaiv logic rau a33KV xob laim Arresteryog ib qho ntawm feem ntau thiab kim yuam kev ua thaum lub sij hawm specification. Tus neeg raug ntes nyob rau hauv - ntsuas ntsuas yuav pib ua thaum lub ntiaj teb ua txhaum cai, ua kom sov nws tsis tuaj yeem ploj mus, thiab thaum kawg ua tsis tiav.
VAJTSWV 33KV Xob Laim Arrester
MCOV: Qhov Specification uas tau hla dhau ntau dhau
MCOV stands rau Maximum Continuous Operating Voltage. Hauv IEC cov qauv koj tseem yuav pom nws sau ua Uc. Nws yog qhov hluav taws xob siab tshaj plaws uas tus neeg ntes tuaj yeem zaum ntawm tsis tu ncua, nyob rau hauv kev ua haujlwm ib txwm muaj, tsis muaj kev puas tsuaj rau lub sijhawm.
Qhov no tseem ceeb vim hais tias tus ntes yog ib txwm txuas ntawm theem thiab lub ntiaj teb. Txawm tias tsis muaj qhov tshwm sim tshwm sim, theem ib txwm muaj - mus rau - lub ntiaj teb hluav taws xob tau zaum hla nws tas li. Thaum lub sij hawm ua txhaum ntawm lwm theem, qhov voltage nce ib ntus. Tus neeg ntes yuav tsum tuav tawm yam tsis muaj kev coj ua, thiab tsis ua noj nws tus kheej hauv cov txheej txheem.
Cov lej tawg roughly zoo li no:
- 9kV ntsuas tus ntes rau 11kV qhov system yuav muaj MCOV ntawm ib ncig ntawm 7.65kV
- 36kV ntsuas tus ntes rau 33kV qhov system feem ntau zaum ntawm ib ncig ntawm 29kV
- Ib tug 42kV rated ntes, uas muab me ntsis ntxiv, ncav ib ncig ntawm 34kV
Thaum koj tab tom tshuaj xyuas cov ntaub ntawv, tsis txhob saib qhov ntsuas hluav taws xob xwb. Txheeb xyuas MCOV tiv thaiv kab siab tshaj plaws - rau - hauv av voltage ntawm koj lub cev, suav nrog kev ua haujlwm siab ntev, uas feem ntau yog ntxiv lossis rho tawm 10% ntawm nominal. Qhov ntawd yog tus lej uas qhia koj tiag tiag seb tus neeg ntes puas nyob hauv koj lub network.
Distribution Class vs Station Class
11kV ntes tau yuav luag ib txwm faib Chav. Lawv tau tsim los rau cov kab nyiaj siv ua haujlwm, ncej-mounted transformers, lub nplhaib tseem ceeb, thiab cov ntawv siv zoo sib xws. Lawv sib zog, me dua, thiab tus nqi rau kev xa tawm loj thoob plaws hauv kev faib khoom.
33kV ntes ntawm kab sib chaws substations yog ib qib sib txawv kiag li. Lawv feem ntau yog Chaw Nres Tsheb, uas txhais tau hais tias muaj peev xwm nqus tau ntau dua, luv dua - Circuit Court tiv thaiv kev ntsuas (qee cov qauv ntsuas cov no mus txog 63,000A), ntev creepage nrug rau ntug hiav txwv lossis thaj chaw muaj kev lag luam, thiab muaj kev tiv thaiv kev tiv thaiv sab hauv. Cov no tsis tuaj yeem hloov pauv nrog cov chav kawm faib khoom, thiab tus nqi sib txawv qhia txog qhov sib txawv ntawm engineering, tsis yog qhov voltage uprating.
Ntawm qhov raug 33/11kV tis substation, 33kV tuaj sab xav tau kev tiv thaiv chaw nres tsheb, thaum 11kV cov khoom siv tawm tuaj yeem siv cov khoom siv faib khoom faib khoom. Yog tias koj tab tom nrhiav rau ob sab ntawm lub chaw nres tsheb, Victory Electric's 33kV cov khoom lag luam muaj xws li chaw nres tsheb -cov tub ceev xwm ntes thiab cov nruab nrab cuam tshuam -voltage tiv thaiv accessories uas npog qhov siab dua -voltage sab ntawm qhov kev teeb tsa.
Residual Voltage thiab Kev Tiv Thaiv Margin
Thaum koj tab tom sib piv ob tus neeg ntes mus rau lub taub hau, tus lej tseem ceeb tshaj plaws yog qhov seem hluav taws xob, qee zaum hu ua qhov hluav taws xob tawm lossis hluav taws xob tiv thaiv qib. Nws tau ntsuas ntawm 10kA nrog 8/20μs waveform thiab qhia koj tias qhov hluav taws xob ntau npaum li cas tus neeg ntes cia los ntawm lub sijhawm nce siab.
Qhov qis dua qhov seem voltage, qhov kev tiv thaiv zoo dua. Tab sis nws kuj yuav tsum nyob twj ywm zoo hauv qab koj cov cuab yeej cuab tam Basic Impulse Insulation Level (BIL). Ib qho kev tiv thaiv zoo yog feem ntau nyob ib ncig ntawm 20 mus rau 30%.
Rau ib qho 11kV system nrog BIL ntawm 75kV, tus neeg ntes cov hluav taws xob seem yuav tsum nyob hauv qab ntawm 53kV. Rau 33kV qhov system uas BIL feem ntau yog 170kV, qhov hluav taws xob seem yuav tsum nyob qis dua 120kV. Yog tias koj tab tom sib piv cov chav nyob los ntawm cov chaw muag khoom sib txawv, siv 10kA kem ntawm cov ntaub ntawv raws li koj qhov kev sib piv thiab xaiv tus lej qis dua.
Ob peb yuam kev tsim nyog zam
Piv txwv tias koj lub 33kV network yog cov av ruaj khov yam tsis tau kuaj xyuas. Ntau qhov qub txeeg qub teg 33kV infrastructure khiav ntawm delta lossis impedance -kev teeb tsa hauv ntiaj teb. Nco ntsoov paub meej nrog tus neeg teb xov tooj network ua ntej koj sau cov lus qhia tshwj xeeb.
Overlooking creepage deb ntawm qhov chaw qias neeg. Ntug hiav txwv substations thiab qhov chaw nyob ze ntawm kev lag luam emissions yuav tsum tau txuas ntxiv creepage, feem ntau 25mm / kV los yog ntau tshaj. Ntawm 33kV cov cuab yeej, uas ntxiv rau qhov sib txawv ntawm lub cev tseem ceeb hauv qhov ntev ntawm cov rwb thaiv tsev.
Sib piv cov ntsuas hluav taws xob yam tsis tau kuaj xyuas MCOV. Ob tug neeg ntes nrog tib Ur tuaj yeem muaj cov MCOV sib txawv. Ib qho nrog MCOV qis dua yuav zoo rau ntawm daim ntawv tab sis tawm tsam hauv koj lub network tiag tiag.
Muab faib cov khoom siv hauv chav kawm ntawm 33kV busbar. Cov theem ntawm lub zog thiab qhov ua txhaum raug cuam tshuam ntawm substation busbars yog sab nraum qhov chaw faib cov tub ceev xwm ntes tau tsim los rau. Chav kawm chaw nres tsheb tsis yog xaiv tau hauv cov ntsiab lus ntawd.
Luv Version
Qhov sib txawv tseem ceeb ntawm 11kV thiab 33kV tus ntes tsis yog qhov hluav taws xob ntawm daim ntawv lo. Nws los txog yuav ua li cas lub network yog earthed, uas tsav lub ntsuas hluav taws xob ntsuas, MCOV qhov yuav tsum tau muaj, thiab chav ntes neeg ntes. Ib qho 11kV tus ntes ntawm lub ntiaj teb sib koom ua ke tuaj yeem ua qhov loj me thiab khaws cia yooj yim. Lub 33KV Lightning Arrester, ua haujlwm nyob rau hauv ib txwm unearthed los yog delta network, yuav tsum tau ntaus nqi siab tshaj qhov koj xav tau, teev nyob rau hauv chaw nres tsheb chav kawm ntawv, thiab xyuas kom zoo zoo tiv thaiv tej yam kev txhaum tiag.
Thaum muaj kev ua xyem xyav, ua haujlwm los ntawm IEC 60099-4, lees paub koj qhov kev teeb tsa hauv av, thiab tsis txhob kho tus neeg raug ntes raws li kev tawm dag zog lub thawv.