Cia peb ua siab ncaj- thaum nws los ua kom lub teeb rau, lub ncoo txo qis mounted transformer rau cov tuam txhab hluav taws xob network tsis tau txais koob meej ntau. Tab sis txiv neej, nws yog ib tug workhorse. Yog tias koj nyob hauv caj dab- sib sib zog nqus hauv kev npaj kev faib tawm hauv av, koj twb paub cov thawv ntsuab (los yog beige) cov thawv hlau no kiag li txhua qhov chaw-los ntawm suburban cul-de-sacs mus rau hauv plawv nroog lag luam blocks. Thiab rau qhov laj thawj zoo.
Lawv tau hloov pauv cov qub -tsev kawm ncej- cov kaus poom hauv feem ntau cov kev tsim kho tshiab. Vim li cas? Lawv muaj kev nyab xeeb dua, lawv tsis rhuav tshem cov zej zog zoo nkauj, thiab lawv ua sitxoj kevzoo dua nrog faus cable systems. Cia peb tawg vim li cas lawv thiaj li mus -rau, qhov koj xav tau tiag tiag spec, thiab qhov twg lub lag luam mus.
Peb Saib Qhov Tseeb Yog Dab Tsi?
Hauv lus Askiv dawb, lub ncoo mounted transformer rau lub tuam txhab siv hluav taws xob siv tsuas yog hnyav -lub luag haujlwm voltage reducer khoom nyob rau hauv lub xauv steel txee uas zaum ntawm lub pob zeb. Koj pub nws nruab nrab qhov hluav taws xob (xav tias 4 kV txog 46 kV) hauv av, thiab nws tawm hauv qhov qis -voltage kua txiv koj cov neeg siv khoom siv tiag tiag -zoo li 120/240V rau tsev lossis 277/480V rau cov tsev lag luam.
Nov yog qhov loj: feem ntau cov khoom siv niaj hnub no xav tau "tuag-pem hauv ntej" tsim. Qhov ntawd tsuas yog txhais tau hais tias tag nrho cov khoom siab -voltage yog them los ntawm insulated luj tshib thiab bushings. Tsis muaj qhov tshwm sim nyob. Vim li cas? Vim tias qee tus menyuam yaus lossis tus dev xav paub tuaj yeem taug kev ncaj qha mus rau cov khoom no, thiab tsis muaj leej twg xav tau kev puas tsuaj ntawm lawv txhais tes.
Koj tseem tuaj yeem xaiv koj qhov tsw ntawm redundancy. Loop-feed designs yog loj nyob rau hauv lub zos vim hais tias lawv muab koj ib tug backup hwj chim txoj kev yog hais tias ib kab nqes. Kev teeb tsa radial yog pheej yig dua thiab yooj yim dua, yog li lawv tseem muaj ntau heev rau sab hauv tsev -txoj kev.
Vim li cas cov khoom siv hluav taws xob ua qhov hloov (yog tias lawv tsis tau)
Yog tias koj tseem dai rau ntawm cov kab nyiaj siv ua haujlwm, ntawm no yog vim li cas lub ncoo -mounted txoj kev feem ntau yeej:
Kev nyab xeeb ua ntej (rau tiag):Cov txee no tawv. Peb tab tom tham tamper-cov ntaub ntawv pov thawj, hnyav-lub luag haujlwm peb- taw tes latches, thiab cov qauv tsim uas tau dhau qhov kev sim siab zoo nkauj thiab kev ua phem phem.
Lawv tsis tawm zoo li tus ntiv tes xoo:Thaum txog 4 mus rau 5 feet siab, lawv tuck zoo tom qab tsob ntoo (tsuas yog tsis txhob thaiv lub qhov rooj, thov!). Lawv yog ib tug npau suav rau cov nroog uas tab tom sim faus tag nrho cov kab saum toj kawg nkaus.
Ua zoo li tanks:Cov tso tsheb hlau luam kaw tau los nag, daus, thiab kub kub. Ntxiv rau, cov khoom siv hluav taws xob ntau tau hloov mus rau cov kua dej ntuj xws li FR3. Nws yog biodegradable thiab muaj qhov hluav taws kub ntau dua li cov roj ntxhia, uas ua rau cov neeg nyob ib puag ncig zoo siab.
Nws tsuas yog raug nqi tsawg dua lub sijhawm:Tseeb, cov iav pem hauv ntej tsis pheej yig, tab sis koj txuag ib pob ntawm kev teeb tsa kev ua haujlwm, koj tsis tas yuav txiav cov ntoo tas li, thiab lawv kav ntau xyoo lawm.
Lawv tau ntse dua:Cov chav niaj hnub no tau tawm los nrog cov sensors rau kev kuaj xyuas qhov txhaum thiab kev saib xyuas cov chaw taws teeb. Qhov no yog qhov loj heev yog tias koj tab tom sim ua ke hnub ci lossis roj teeb cia rau hauv koj daim phiaj yam tsis tau tshuab ib yam dab tsi.
Lub Nitty-Gritty: Specs thiab Standards
Saib, koj tsis tuaj yeem yuav ib lub thawv tawm hauv internet xwb. Ib lub ncoo mounted transformer rau cov tuam txhab hluav taws xob specs yuav tsum tau ua raws li ANSI / IEEE C57.12.34, UL 1562, thiab cov pesky DOE 2016 kev ua haujlwm zoo.
Tsuas yog muab koj lub ballpark, ntawm no yog dab tsi peb -phase unit zoo li ntawm daim ntawv:
| kVA ntau | Common Primary Voltages | Secondary Voltages | Impedance | BIL Rating |
|---|---|---|---|---|
| 150–300 | 12.47 kV, 13.8 kV | 208Y/120, 480Y/277 | 3.1 – 5.75% | 95-150 kV |
| 500–1000 | 24.94 kV, 34.5 kV | 480Y/277 | 4.35 – 5.75% | 125-150 kV |
| 1500–2500 | Mus txog 46 kV | Txog li 15 kV chav kawm | ~5.75% | 150-250 kV |
| 3000–5000+ | Custom utility specs | Kev cai | 5.75 – 6.5% | 150+ kV |
Lus Cim: Rau ib qho - cov khoom nyob hauv ib theem, feem ntau koj saib ntawm 25–250 kVA. Thiab tsis txhob hnov qab cov kais hloov pauv- feem ntau tsib txoj haujlwm- yog li koj tuaj yeem hu rau hauv qhov hluav taws xob yog tias txhua yam tau txais txiaj ntsig.
Pad-Mounted vs. Ncej-Mounted: Kev Tshawb Xyuas Kev Muaj Peev Xwm Ceev
Tseem debating? Nov yog daim ntawv khib nyiab ntawm vim li cas cov kws ua haujlwm feem ntau ntsoog rau hauv ncoo- tau nruab hnub no:
Kev teeb tsa:Hauv av- qib ncoo vs. nqa lub iav nce tus ncej. Kuv paub qhov twg kuv xav tau kev pabcuam rau hnub Tuesday los nag.
Kev nyab xeeb:Pad units yeej ob txhais tes- nqis nrog tamper- tiv thaiv iav. Cov ncej zoo, tab sis linemen yuav tsum ua haujlwm ntawm qhov siab.
Kev zoo nkauj:Tsis muaj kev sib tw. Ib qho yog qhov qis- lub thawv profile, lwm qhov yog tangle ntawm cov xov hlau nyob saum ntuj.
Muaj peev xwm:Xav tau 10 MVA? Koj mus pad-mounted. Ncej feem ntau max tawm ntawm 500 kVA.
Kev tu:Hauv av - theem txhais tau tias koj tsuas yog taug kev nrog koj cov cuab yeej. Ncej -mounts? Vam tias koj nqa lub thoob tsheb thauj khoom.
Ob peb Nyuaj-Kawm Tau Txais Cov Lus Qhia ntawm Kev Txhim Kho & Kev Kho
Yog tias koj nyob hauv thaj teb, koj paub tias dab ntxwg nyoog nyob hauv cov ntsiab lus. Cov pob zeb ua pob zeb yuav tsum muaj zog thiab loj npaum li cas - ib qho me me 5x5 ko taw rau cov me me, lossis loj dua rau 1000+ kVA tsiaj nyaum. Xyuas kom koj cov conduits yog lined zoo kawg nkaus nrog lub thawv qhib.
Thiab thov, muab chav ua pa rau nws. Cov lej hluav taws hauv zos feem ntau xav tau 3 mus rau 10 feet ntawm kev tshem tawm ntawm cov tsev, nyob ntawm seb sab twg koj tab tom saib.
Rau kev tu, tsis txhob tub nkeeg. Regular visual checks, infrared scans to catch hot spots, and quarterly oil sampling (Dissolved Gas Analysis, or DGA) will save your bacon. Ntau ntawm peb tsuas yog khaws cov qauv ntsuas tam sim no rau kev hloov pauv sai sai - tawm. Thaum ib tug tshuab, peb tsis kho nws nyob rau hauv lub tshav pob; peb tsuas yog tso rau hauv ib qho khoom seem thiab xa cov kib mus rau lub khw.
Dab tsi yog Los Ntawm Cov Pipeline?
Kev thov tsuas yog nce. Kev loj hlob hauv nroog, kev thawb rau faus kab, thiab tag nrho cov hnub ci / cua kev koom ua ke no txhais tau tias peb tab tom xaj ntau lub ncoo mounts dua puas tau. Cov npe loj xws li Eaton, Schneider, thiab Siemens tab tom ua rau lawv tawm, tab sis tau ceeb toom - lub sijhawm ua ntej tau npau suav phem tsis ntev los no. Cia siab tias 16 txog 20 lub lis piam rau kev tsim kho yog tias koj muaj hmoo.
Mob taub hau loj tam sim no? Muab cov saw hlau tsis txaus ntawm tooj liab thiab hlau, thiab txheeb xyuas seb yuav ua li cas thiaj li cuam tshuam kev sib haum xeeb ntawm txhua qhov chaw cov ntaub ntawv thiab EV chargers. Ntawm qhov kaj, peb tab tom pom cov kev hloov tshiab tshiab xws li kev sib txuas ntawm lub tshuab nqus tsev cuam tshuam (VFI) thiab cov sensors ntse dua uas qhia tau rau koj thaum lawv tab tom yuav ua tsis tiav.
Kab hauv qab
Saib, lub ncoo mounted transformer rau kev ua haujlwm ntawm lub tuam txhab tsis yog flashy. Tab sis nws yog lub caj qaum ntawm daim phiaj niaj hnub, txhim khu kev qha. Thaum koj xaiv ib qho tawm, tsis txhob cia li saib tus nqi tag -xav txog koj qhov kev loj hlob ntawm 20 xyoo tom ntej, koj cov lej kev nyab xeeb hauv zos, thiab nws yooj yim npaum li cas rau koj cov neeg ua haujlwm.
Ua kom raug, thiab nws yuav zaum ntsiag to hauv lub laj kab ntawd - tawm ntawm kaum xyoo, ua nws txoj haujlwm yam tsis muaj peep. Koom tes nrog cov chaw tsim khoom lag luam uas paub txog lawv cov khoom, thiab koj yuav zam kev mob taub hau ntau hauv txoj kev. Cia siab rau kuv ntawm qhov ntawd.
FAQ
Q: Ntev npaum li cas koj tuaj yeem xa cov transformer?
A: Nws nyob ntawm qhov ntau thiab muaj peev xwm ntawm transformer, feem ntau nyob rau hauv ib lub hlis txij li hnub kos duab lees paub los ntawm cov neeg yuav khoom.
Q: Ntev npaum li cas koj tuaj yeem muab qhov kev lees paub zoo?
A: 24 lub hlis txij li hnub transformer ua haujlwm.
Q: Koj txais txoj kev them nyiaj dab tsi?
A: T / T (hloov pauv) nyiam, L / C ob leeg txais.
