Malawi Faib Faib Faib Txoj Haujlwm|1000kVA 11/0.4kV Roj Immersed Transformer tov rau High Altitude Condition
Sep 18, 2026
Tso lus
Malawi lub zog faib hluav taws xob txuas ntxiv xav tau cov khoom siv hluav taws xob faib hluav taws xob uas ua tau zoo nyob rau hauv kev ua haujlwm siab siab, hloov cov av noo, thiab nruj me ntsis thoob ntiaj teb specifications. Peb txaus siab muab ib1000kVA roj immersed faib transformerengineered kom ua tau raws li cov kev cai ntawm ESCOM ED0017 specification, tus qauv siv feem ntau siv rau kev faib khoom transformer hauv Malawi.
System thiab Environmental Parameters
Peb 1000kVA peb theem roj immersed transformer yog tsim los rau Malawian daim phiaj xwm txheej tau teev tseg hauv ESCOM ED0017:
- Qhov System:11 kV nominal, 12 kV siab tshaj qhov system voltage, 50 Hz ± 2.5%
- Ambient kub ntau yam:-5℃rau +45 degree
- Qhov siab tshaj plaws installation qhov siab:1800 meters saum toj no hiav txwv theem, nrog ntxiv dag zog rwb thaiv tsev los them rau txo cua ceev
- txheeb ze humidity:mus txog 95%
Engineering tswv yim:Qhov siab yog qhov tseem ceeb uas ntau tus neeg muag khoom saib dhau. Ntawm 1800 m saum toj no hiav txwv theem, qhov txo qis huab cua tsis muaj zog ua rau cov rwb thaiv tsev sab nraud thiab ua rau cov cua txias tsis zoo, yog li cov qauv tsim yuav tsum suav nrog qhov siab - kho qhov rwb thaiv tsev clearances thiab derating xam. Thaum peb xa daim ntawv twv, peb ib txwm muab cov ntawv kho qhov siab mus rau qhov kev tshaj tawm, yog li pab pawg neeg soj ntsuam tuaj yeem txheeb xyuas qhov ua raws li ncaj qha.
Kev ntsuas hluav taws xob
- Kev ntsuas:1000 kVA, peb theem
- Voltage ratio:11kV txog 400V (11/0.4kV)
- Vector pawg:Dyn 11
- Cua txias:ONAN (Oil Natural Air Ntuj)
- Coj mus rhaub changer:Tawm -load kais hloov pauv, ± 5% kev tswj hwm hauv cov kauj ruam ntawm 2.5%
- Rwb thaiv tsev theem, thawj (11 kV):theem pib rwb thaiv tsev 95 kV, lub zog zaus tiv taus 28 kV
- Rwb thaiv tsev theem, theem nrab (400 V):theem pib rwb thaiv tsev 30 kV, lub zog zaus tiv taus 2.5 kV
Engineering tswv yim:2.5% kais cov kauj ruam tau teev tseg vim Malawian 11 kV feeders feem ntau muaj kev hloov pauv ntawm qhov nruab nrab ntawm cov kab xa tawm nyob deb nroog. Qhov tawm -load kais hloov pauv hauv 2.5% cov kauj ruam cia cov kws ua haujlwm hauv thaj chaw kho kom haum rau qhov chaw qhov hluav taws xob tsis hloov pauv, uas yog raws nraim li ESCOM ED0017 xav tau. Peb paub meej tias tus kais ntau yam tawm tsam qhov tseeb feeder voltage profile ua ntej ntau lawm.
Ua rau International thiab Southern African Standards
Ua raws li PIESA 1006, SABS 780, IEC 60076, IEC 60815 thiab IEC 61109, lub transformer suav nrog cov yam ntxwv tsim nyog rau Malawian qhov kev lees txais:
- Copper windings:High voltage thiab low voltage windings ob leeg nyob rau hauv tooj liab, kom ntseeg tau superior conductivity thiab ntev kev pab cuam lub neej
- PCB-cov roj insulating dawb:Environmentally phooj ywg roj uas tsis muaj polychlorinated biphenyls
- Corrugated Tank:Welded corrugated radiator tank, nrog yam tsawg kawg nkaus xim zaj duab xis tuab ntawm 125 micrometers, tiav hauv avocado lossis grey
- Bushings:Tsim los rau SABS 780, nrog rau cov yam ntxwv ntawm IEC 60815
- Kev txiav txim siab:Lub thawv cable rau ob sab - thawj lub thawv cable haum rau 3-core XLPE / PILC cable txog 120 mm², lwm lub thawv cable haum rau 4-core SWA cable txog 185 mm²
- Fittings:Lifting lugs ntawm ob kawg ntawm lub tank npog, bolted tank cover, earthing boss M12 x 25 mm, lockable log, thiab ntshiab tank cim pom los ntawm theem av
Engineering tswv yim:Cov khoom siv hluav taws xob yav qab teb African ntsuas cov tshuab hloov hluav taws xob tawm tsam IEC 60076 thiab SANS 780, thiab SANS 780 yog nruj dua ntawm cov tshuab sab nraud. Nws ntxiv qhov ntsuas qhov tawv nqaij thiab yuav tsum muaj qhov tsawg kawg nkaus xim zaj duab xis tuab ntawm 125 micrometers, uas tseem ceeb hauv Malawi 95% av noo thiab UV raug. Peb kuj haum rau lub thawv cable rau qhov loj me me hauv qhov tshwj xeeb (120 mm² peb-core ntawm thawj, 185 mm² plaub-core SWA ntawm qhov thib ob), yog li qhov chaw cable txiav tawm ncaj qha - tsis muaj adapter ua haujlwm ntawm kev teeb tsa.
Hom Kev Xeem thiab Cov Kev Xeem niaj hnub
Txhua chav nyob yog them los ntawm qhov kev xeem ua tiav nrog cov ntawv pov thawj uas muab ua lus Askiv:
Hom kev xeem:Kev ntsuas kub nce mus rau IEC 60076-1, dielectric hom kev sim rau IEC 60076-3, tank khov kho rau SANS 780, corrugated tank qaug zog kuaj rau IEC 60076-5, luv-circuit withstand test rau IEC 60076-5, thiab kev sib xyaw ua ke.
Cov kev ntsuam xyuas niaj hnub:Winding resistance test rau IEC 60076-1, qhov sib piv voltage thiab theem hloov pauv, luv-circuit impedance thiab load poob xeem, tsis muaj load poob thiab tam sim no xeem, xim thickness kuaj rau SANS 780, thiab efficiency ntawm sealing xeem rau SANS 780.
Cov ntaub ntawv thiab xa tawm
Txhua qhov khoom xa tuaj suav nrog cov ntaub ntawv Askiv ua tiav:
- Ntaus ntawv pov thawj thiab daim ntawv pov thawj kev xeem ua lus Askiv
- Engineering kos duab qhia txog qhov ntev xws li cov surge arrestors, transformer mounting qhov kev npaj, davhlau ya nyob twg thiab labelling, txoj hauj lwm ntawm tapping hloov, thiab ntsuam xyuas thiab daim duab daim hlau
- Ntau lawm kev ruaj ntseg ntawv pov thawj
- Tus neeg tsim khoom daim ntawv tso cai muaj rau cov neeg muag khoom uas tsis yog cov chaw tsim khoom
Txhawb nqa Southern African Power Projects
Nrog rau kev paub dhau los ua haujlwm rau kev faib hluav taws xob thoob plaws tebchaws Africa sab qab teb, suav nrog Malawi, Zambia, Mozambique, thiab South Africa, peb nkag siab txog kev sib tw, cov txheej txheem ntawv pov thawj, thiab kev lees txais cov cai tshwj xeeb rau thaj av. Peb ua haujlwm ze nrog EPC cov neeg cog lus, cov khoom siv hluav taws xob, thiab cov tswv lag luam los muab cov lus teb kev sib tw thiab cov kev hloov pauv hloov kho. Peb tus qauv warranty npog peb xyoos rau cov neeg siv khoom hauv tsev thiab ib xyoos rau cov haujlwm txawv teb chaws.
Vim li cas thiaj ua haujlwm nrog peb:
Peb tsis kho ESCOM ED0017 specification raws li daim ntawv teev npe - peb cov engineers mus dhau nws cov lus los ntawm clause, chij qhov kev lees paub- cov ntsiab lus tseem ceeb (kev kho qhov siab, xim tuab, qhov ntau thiab tsawg lub thawv, daim ntawv pov thawj Askiv), thiab cuam tshuam rau lawv hauv cov lus hais thiab kos duab ua ntej koj cog lus. Yog tias koj qhov project yog nyob rau theem kev sib tw, xa peb cov lus qhia thiab peb yuav xa rov qab ib nqe lus -los ntawm -clause ua raws li nqe lus ua ke nrog cov lus hais.
Yog tias koj tab tom npaj ib lub chaw nres tsheb lossis cov phiaj xwm xa tawm hauv Malawi thiab xav tau 11 kV faib transformers, hu rau peb pab neeg hnub no. Xa peb koj qhov project technical specifications, thiab peb yuav muab cov ncauj lus kom ntxaws technical proposal thiab hais lus raws li koj xav tau.
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