Nyob rau hauv lub ntiaj teb transformer, cov ntsiab lus "loop feed" thiab "radial feed" yog feem ntau txuam nrog HV bushing layout rau compartmentalized padmount transformers. Cov ntsiab lus no, txawm li cas los xij, tsis yog los ntawm cov transformers. Lawv tuaj ntawm lub tswv yim dav dav ntawm kev faib hluav taws xob hauv cov tshuab hluav taws xob (lossis circuits). Lub transformer yog hu ua lub voj feed transformer vim hais tias nws bushing configuration yog tailored rau lub voj tis system. Tib yam siv rau cov transformers peb cais raws li radial pub-lawv cov txheej txheem bushing feem ntau haum rau cov tshuab radial.
Ntawm ob hom transformers, lub voj pub version yog qhov hloov tau tshaj plaws. Lub voj voog pub khoom tuaj yeem ua kom haum rau ob qho tib si radial thiab lub voj kaw lus teeb tsa, thaum radial feed transformers yuav luag ib txwm tshwm sim hauv cov tshuab radial.
Radial thiab Loop Feed Distribution Systems
Ob lub tshuab radial thiab lub voj voog tsom kom ua tiav ib yam: xa cov hluav taws xob nruab nrab hluav taws xob los ntawm ib qho chaw (feem ntau yog lub chaw nres tsheb) mus rau ib lossis ntau lub kauj ruam-down transformers ua haujlwm.
Radial pub yog qhov yooj yim ntawm ob. Xav txog ib lub voj voog uas muaj ob peb kab (lossis radians) pib los ntawm ib qho chaw nruab nrab, raws li qhia hauv daim duab 1. Qhov chaw nruab nrab no sawv cev rau lub hauv paus ntawm lub zog, thiab cov squares ntawm txhua kab sawv cev rau cov kauj ruam-down transformers. Hauv qhov kev teeb tsa no, txhua lub tshuab hloov pauv tau pub los ntawm tib lub ntsiab lus hauv lub cev, thiab yog tias lub zog hluav taws xob cuam tshuam rau kev saib xyuas, lossis yog tias muaj teeb meem tshwm sim, tag nrho lub cev poob mus txog thaum qhov teeb meem raug daws.
Daim duab 1: Daim duab saum toj no qhia tau hais tias cov transformers txuas nrog hauv ib qho kev faib hluav taws xob radial. Qhov chaw nruab nrab sawv cev rau qhov chaw ntawm lub zog hluav taws xob. Txhua square sawv cev rau ib tug neeg transformer noj los ntawm tib lub zog mov.
Daim duab 2: Nyob rau hauv ib lub voj feed distribution system, transformers tuaj yeem pub los ntawm ntau qhov chaw. Yog hais tias qhov tsis ua hauj lwm ntawm lub feeder cable upwind ntawm qhov chaw A tshwm sim, lub kaw lus yuav siv tau los ntawm cov feeder cables txuas nrog qhov chaw B uas tsis muaj qhov tseem ceeb ntawm kev pabcuam.
Hauv ib lub voj voog, lub zog tuaj yeem muab los ntawm ob lossis ntau qhov chaw. Hloov chaw pub mov transformers los ntawm ib lub hauv paus ntsiab lus raws li nyob rau hauv daim duab 1, lub voj kaw lus qhia nyob rau hauv daim duab 2 muaj ob qhov chaw sib cais los ntawm lub hwj chim yuav muab tau. Yog tias ib qho hluav taws xob tawm mus offline, lwm qhov tuaj yeem muab hluav taws xob txuas ntxiv mus rau qhov system. Qhov kev rov ua dua tshiab no muab kev pabcuam txuas ntxiv thiab ua rau lub voj voog txoj kev xaiv rau ntau tus neeg siv kawg, xws li tsev kho mob, tsev kawm qib siab, tshav dav hlau, thiab cov chaw lag luam loj. Daim duab 3 muab kev pom ze ntawm ob lub tshuab hloov pauv uas tau piav qhia hauv lub voj voog kaw los ntawm daim duab 2.
Daim duab 3: Daim duab saum toj no qhia tau hais tias ob lub voj voog pub hloov pauv hloov ua ke ua ke hauv lub voj voog uas muaj kev xaiv pub los ntawm ib qho ntawm ob lub zog siv.
Qhov sib txawv ntawm radial thiab voj tshuab tuaj yeem ua tiav raws li hauv qab no:
Yog hais tias lub transformer tau txais lub zog los ntawm ib qho taw tes hauv ib lub voj voog, ces qhov system yog radial.
Yog hais tias ib tug transformer muaj peev xwm txais lub hwj chim los ntawm ob los yog ntau tshaj cov ntsiab lus nyob rau hauv ib tug Circuit Court, lub system yog voj.
Kev soj ntsuam ze ntawm transformers nyob rau hauv ib lub voj voog yuav tsis qhia meej seb lub kaw lus puas yog radial lossis voj; Raws li peb tau taw qhia thaum pib, ob lub voj voog pub thiab radial feed transformers tuaj yeem teeb tsa los ua haujlwm nyob rau hauv ob qho kev teeb tsa (tab sis dua, nws tsis tshua pom muaj radial feed transformer hauv lub voj voog). Ib daim phiaj siv hluav taws xob thiab ib kab yog txoj hauv kev zoo tshaj plaws los txiav txim siab qhov kev teeb tsa thiab kev teeb tsa. Uas tau hais tias, nrog saib ze dua ntawm thawj bushing configuration ntawm radial thiab voj feed transformers, nws yog feem ntau muaj peev xwm kos ib tug paub zoo lus xaus txog lub system.
Radial thiab Loop Feed Bushing Configurations
Nyob rau hauv padmount transformers, lub ntsiab sib txawv ntawm radial thiab voj pub nyob rau hauv thawj / HV bushing configuration (sab laug sab ntawm lub transformer txee). Nyob rau hauv ib tug radial pub thawj, muaj ib tug bushing rau txhua ntawm peb lub sij hawm nkag mus conductors, raws li qhia nyob rau hauv daim duab 4. Qhov layout no feem ntau pom qhov twg tsuas yog ib tug transformer yuav tsum tau mus zog rau tag nrho cov chaw los yog chaw. Raws li peb yuav pom tom qab, radial feed transformers feem ntau yog siv rau lub xeem chav tsev nyob rau hauv ib tug series ntawm transformers txuas ua ke nrog voj feed primaries (saib daim duab 6).
Daim duab 4:Radial feed configurations yog tsim los rau ib qho khoom noj thawj zaug.
Loop feed primaries muaj rau bushings es tsis txhob peb. Qhov kev npaj ntau tshaj plaws yog hu ua V Loop nrog ob pawg ntawm peb staggered bushings (saib daim duab 5) - peb bushings ntawm sab laug (H1A, H2A, H3A) thiab peb sab xis (H1B, H2B, H3B), raws li tau hais tseg. hauv IEEE Std C57.12.34.
Daim duab 5: Ib lub voj feed configuration muaj qhov muaj peev xwm muaj ob lub ntsiab pub.
Feem ntau daim ntawv thov rau ib tug rau-bushing thawj yog mus txuas ob peb lub voj feed transformers ua ke. Hauv qhov teeb tsa no, cov khoom siv hluav taws xob nkag tau raug coj mus rau hauv thawj qhov hloov pauv hauv kab. Ib txheej thib ob ntawm cables khiav los ntawm B-sab bushings ntawm thawj chav tsev mus rau A-sab bushings ntawm transformer tom ntej hauv koob. Txoj kev no ntawm daisy-chaining ob lossis ntau dua transformers nyob rau hauv kab kuj tseem hu ua "voj" ntawm transformers (los yog "looping transformers ua ke"). Nws yog ib qho tseem ceeb kom paub qhov txawv ntawm "voj" (los yog daisy saw) ntawm transformers thiab voj pub raws li nws muaj feem xyuam rau transformer bushings thiab hluav taws xob faib tshuab. Daim duab 6 qhia txog ib qho piv txwv zoo meej ntawm lub voj voog ntawm kev hloov pauv tau nruab rau hauv lub tshuab radial. Yog tias lub zog poob ntawm qhov chaw, tag nrho peb lub tshuab hloov pauv yuav offline kom txog thaum lub zog rov qab los. Nco ntsoov, kev soj ntsuam ze ntawm lub radial feed unit nyob rau sab xis sab xis yuav qhia txog lub tshuab radial, tab sis qhov no yuav tsis meej yog tias peb tsuas yog saib ntawm ob chav.
Daim duab 6: Cov pab pawg no ntawm transformers yog pub los ntawm ib qho chaw pib ntawm thawj transformer hauv koob. Thawj pub yog kis los ntawm txhua lub transformer nyob rau hauv lineup mus rau qhov kawg chav tsev uas nws yog txiav.
Sab hauv thawj sab bayonet fuses tuaj yeem muab ntxiv rau txhua qhov hloov pauv, raws li qhia hauv daim duab 7. Lub hauv paus fusing ntxiv ib txheej ntxiv ntawm kev tiv thaiv hluav taws xob-tshwj xeeb tshaj yog thaum ob peb lub tshuab hluav taws xob sib txuas ua ke yog tus kheej fused.
Daim duab 7:Txhua transformer yog outfitted nrog nws tus kheej internal overcurrent tiv thaiv.
Yog hais tias qhov kev ua txhaum thib ob tshwm sim ntawm ib chav tsev (Daim duab 8), qhov kev sib txuas tseem ceeb yuav cuam tshuam qhov ntws ntawm overcurrent ntawm lub faulted transformer ua ntej nws muaj peev xwm ncav cuag cov seem ntawm cov units, thiab ib txwm tam sim no yuav txuas ntxiv mus dhau lub faulted unit. qhov seem transformers hauv Circuit Court. Qhov no txo qis lub sijhawm poob qis thiab ua rau qhov tsis ua haujlwm rau ib chav tsev thaum ob peb chav nyob sib txuas ua ke hauv ib ceg hluav taws xob. Qhov kev teeb tsa no nrog kev tiv thaiv sab hauv overcurrent tuaj yeem siv rau hauv radial lossis lub voj voog - nyob rau hauv ob qho tib si, lub fuse fuse yuav cais lub faulted unit thiab lub load nws ua hauj lwm.
Daim duab 8: Nyob rau hauv cov kev tshwm sim ntawm ib tug load sab txhaum ntawm ib chav tsev nyob rau hauv ib tug series ntawm transformers, thawj sab fusing yuav cais lub faulted unit los ntawm lwm yam transformers nyob rau hauv lub voj-tiv thaiv ntxiv kev puas tsuaj thiab tso cai rau unbroken ua hauj lwm rau tus so ntawm lub system.
Lwm daim ntawv thov ntawm lub voj feed bushing configuration yog txuas ob qhov chaw pub (Pib A thiab Pub B) rau ib chav tsev. Qhov no zoo ib yam li cov xwm txheej ua ntej hauv daim duab 2 thiab daim duab 3, tab sis nrog ib chav tsev. Rau daim ntawv thov no, ib los yog ntau dua roj-immersed rotary-type selector keyboards yog ntsia rau hauv lub transformer, tso cai rau lub tsev los hloov ntawm ob tug pub raws li xav tau. Qee qhov kev teeb tsa yuav tso cai hloov pauv ntawm txhua qhov chaw pub khoom noj uas tsis muaj lub zog poob rau lub sijhawm thauj khoom - qhov txiaj ntsig tseem ceeb rau cov neeg siv kawg uas muaj txiaj ntsig kev pabcuam hluav taws xob txuas ntxiv.
Daim duab 9: Daim duab saum toj no qhia tau hais tias ib lub voj voog pub hloov pauv hauv lub voj voog nrog kev xaiv pub los ntawm ib qho ntawm ob lub zog siv.
Ntawm no yog lwm qhov piv txwv ntawm lub voj feed transformer ntsia nyob rau hauv lub radial system. Hauv qhov xwm txheej no, thawj lub txee muaj tsuas yog ib txheej ntawm cov neeg xyuas pib tsaws ntawm A-sab bushings, thiab thib ob ntawm B-sab bushings raug txiav nrog ob lub kaus mom insulated lossis lub luj tshib. Qhov kev npaj no zoo tagnrho rau txhua daim ntawv thov pub radial uas tsuas yog ib qho kev hloov pauv yuav tsum tau ua hauv kev teeb tsa. Txhim kho surge tiv thaiv cov cuab yeej ntawm B-sab bushings kuj yog tus qauv kev teeb tsa rau lub tshuab hluav taws xob kawg hauv cov saw lossis cov voj voog pub khoom noj (raws li kev tiv thaiv surge yog ntsia ntawm chav tsev kawg).
Daim duab 10: Ntawm no yog ib qho piv txwv ntawm lub voj pub thawj nrog rau 6 bushings qhov thib ob peb B-sab bushings raug txiav nrog cov neeg tuag pem hauv ntej lub luj tshib. Qhov kev teeb tsa no ua haujlwm rau ib qho kev hloov pauv ntawm nws tus kheej, thiab nws kuj yog siv rau qhov kawg transformer nyob rau hauv ib tug series ntawm kev cob cog rua units.
Nws tseem muaj peev xwm rov ua dua qhov kev teeb tsa no nrog peb-bushing radial pub thawj siv rotatable pub-los ntawm (lossis feedthru) inserts. Txhua qhov pub-dhau tso rau hauv muab rau koj xaiv rau nruab ib lub cable txiav thiab ib tug tuag pem hauv ntej luj tshib ntes ib theem. Qhov kev teeb tsa no nrog kev pub-dhau los ntawm cov khoom siv kuj tseem ua rau tsaws lwm cov kab hluav taws xob rau kev siv lub voj voog, lossis peb qhov kev sib txuas ntxiv tuaj yeem siv los pub lub zog rau lwm lub tshuab hluav taws xob hauv ib lub voj voog (lossis voj) ntawm chav nyob. Kev pub-los ntawm kev teeb tsa nrog radial transformers tsis tso cai rau kev xaiv ntawm kev sib cais ntawm A-sab thiab B-sab bushings nrog cov keyboards sab hauv ntawm lub transformer, uas ua rau nws tsis xav tau kev xaiv rau lub voj voog. Ib chav tsev zoo li no tuaj yeem siv rau ib ntus (lossis xauj tsev) kev daws teeb meem thaum lub voj voog pub hloov pauv tsis tau yooj yim, tab sis nws tsis yog qhov kev daws teeb meem zoo tshaj plaws.
Daim duab 11: Rotatable feed-through inserts may be used to add arresters or other set of outgoing cables to a radial feed bushing setup.
Raws li tau hais thaum pib, lub voj voog pub hloov pauv tau siv dav hauv cov tshuab radial txij li lawv tuaj yeem yooj yim muab tso rau kev ua haujlwm nyob ib leeg raws li qhia saum toj no hauv daim duab 10, tab sis lawv yuav luag txhua qhov kev xaiv tshwj xeeb rau lub voj voog vim lawv rau-bushing. layout. Nrog rau kev teeb tsa ntawm cov roj-immersed selector hloov, ntau qhov chaw pub tuaj yeem tswj tau los ntawm thawj lub txee ntawm chav tsev.
Lub hauv paus ntsiab lus nrog selector keyboards cuam tshuam qhov ntws ntawm tam sim no ntawm transformer lub coils ib yam li ib qho yooj yim rau / tawm mus nrog lub peev xwm ntxiv ntawm redirecting tam sim no ntws ntawm A-sab thiab B-sab bushings. Qhov yooj yim selector hloov configuration kom nkag siab yog peb ob txoj haujlwm hloov kev xaiv. Raws li daim duab 12 qhia, ib qho kev hloov pauv hloov pauv hloov pauv nws tus kheej, thiab ob lub hloov pauv ntxiv tswj hwm A-sab thiab B-sab pub rau tus kheej. Qhov kev teeb tsa no zoo meej rau kev teeb tsa lub voj voog (raws li hauv daim duab 9 saum toj no) uas yuav tsum tau xaiv ntawm ob qhov chaw sib txawv ntawm txhua lub sijhawm. Nws kuj ua haujlwm zoo rau cov tshuab radial nrog ntau chav daisy-chained ua ke.
Daim duab 12:Ib qho piv txwv ntawm transformer nrog peb tus kheej ob-txoj hauj lwm hloov ntawm thawj sab. Hom kev hloov pauv no kuj tseem tuaj yeem ua haujlwm nrog ib qho kev hloov plaub-txoj haujlwm, txawm li cas los xij, qhov kev xaiv plaub-txoj haujlwm tsis yog ntau yam, vim nws tsis tso cai rau kev hloov pauv ntawm lub transformer nws tus kheej tsis hais txog ntawm A-sab thiab B-sab pub.
Daim duab 13 qhia peb lub tshuab hloov pauv, txhua qhov muaj peb qhov hloov pauv ob txoj haujlwm. Thawj chav nyob ntawm sab laug muaj tag nrho peb lub keyboards nyob rau hauv qhov chaw kaw (on) . Lub transformer nyob rau hauv nruab nrab muaj ob qho tib si A-sab thiab B-sab keyboards nyob rau hauv lub kaw txoj hauj lwm, thaum lub switching tswj lub transformer kauj nyob rau hauv lub qhib (tawm) txoj hauj lwm. Hauv qhov xwm txheej no, lub zog yog muab rau cov khoom thauj los ntawm thawj transformer thiab qhov kawg transformer hauv pab pawg, tab sis tsis yog rau nruab nrab chav tsev. Tus neeg A-sab thiab B-sab on/off keyboards tso cai rau cov ntws ntawm tam sim no mus rau lub tom ntej unit nyob rau hauv lineup thaum lub on/off hloov rau lub transformer kauj yog qhib.
Daim duab 13: Los ntawm kev siv ntau lub keyboards xaiv ntawm txhua qhov hloov pauv, chav nyob hauv qhov chaw yuav raug cais tawm yam tsis muaj lub zog poob rau cov nyob ib sab.
Muaj lwm qhov kev hloov pauv tau, xws li plaub txoj haujlwm hloov-uas nyob rau hauv ib txoj kev sib txuas peb tus kheej ob txoj haujlwm hloov mus rau hauv ib lub cuab yeej (nrog ob peb qhov sib txawv). Plaub txoj haujlwm hloov pauv kuj tseem hu ua "loop feed keyboards" vim tias lawv tsuas yog siv nrog lub voj pub hloov pauv. Loop feed keyboards yuav siv tau nyob rau hauv radial lossis voj tshuab. Hauv cov kab hluav taws xob radial, lawv tau siv los cais cov hloov pauv ntawm lwm tus hauv ib pab pawg raws li hauv daim duab 13. Hauv lub voj voog, cov keyboards no feem ntau siv los tswj fais fab ntawm ib qho ntawm ob qhov chaw tuaj (xws li hauv daim duab 9).
Ib qho kev sib sib zog nqus ntawm lub voj feed keyboards yog dhau ntawm qhov ntawm cov kab lus no, thiab cov lus piav qhia luv ntawm lawv ntawm no yog siv los qhia qhov tseem ceeb hauv kev hloov pauv hloov pauv hloov pauv ua si hauv lub voj pub hloov pauv tau nruab rau hauv radial thiab voj tshuab. Rau feem ntau cov xwm txheej uas yuav tsum tau hloov pauv hloov pauv hauv lub voj voog pub, hom kev hloov pauv tau tham saum toj no yuav tsum tau ua. Peb ob txoj haujlwm hloov pauv muaj qhov ua tau zoo tshaj plaws, thiab vim li no, lawv yog cov kev daws teeb meem zoo tshaj plaws hauv kev hloov pauv hloov tau nruab rau hauv lub voj voog.
Cov ntsiab lus
Raws li txoj cai dav dav ntawm tus ntiv tes xoo, radial feed pad-mounted transformer feem ntau qhia tau hais tias radial system. Nrog lub voj feed pad-mounted transformer, nws tuaj yeem nyuaj rau kev txiav txim siab txog kev teeb tsa hauv Circuit Court. Lub xub ntiag ntawm sab hauv roj-immersed selector keyboards feem ntau qhia txog lub voj voog, tab sis tsis tas li. Raws li tau hais thaum pib, lub voj voog siv feem ntau yog siv qhov kev pabcuam txuas ntxiv, xws li tsev kho mob, tshav dav hlau, thiab tsev kawm qib siab. Rau kev teeb tsa tseem ceeb xws li cov no, ib qho kev teeb tsa tshwj xeeb yuav luag ib txwm xav tau, tab sis ntau daim ntawv thov kev lag luam thiab kev lag luam yuav tso cai rau qee qhov yooj yim hauv kev teeb tsa ntawm lub ncoo-mounted transformer tau muab nkag - tshwj xeeb tshaj yog tias lub kaw lus yog radial.
Yog tias koj yog tus tshiab los ua haujlwm nrog radial thiab voj feed pad-mounted transformer daim ntaub ntawv, peb pom zoo kom khaws phau ntawv qhia no ua ib qho kev siv. Peb paub tias nws tsis meej, txawm li cas los xij, thov koj xav tiv tauj peb yog tias koj muaj lus nug ntxiv. Peb kuj ua haujlwm hnyav los khaws peb cov khoom muag ntawm cov transformers thiab cov khoom kom zoo, yog li qhia rau peb paub yog tias koj xav tau daim ntawv thov tshwj xeeb.
Post lub sij hawm: Nov-08-2024