3000 KVA IEC 60076 Fais fab Transformers-88/11 KV|South Africa 2025

01 General

1.1 Project Description

3000 kVA earthing transformer tau xa mus rau South Africa hauv 2025. Lub zog ntsuas ntawm lub transformer yog 3000 kVA nrog ONAN txias. Thawj qhov hluav taws xob yog 88 kV nrog ± 2 * 2.5% tapping ntau yam (NLTC), qhov nruab nrab voltage yog 11 kV, lawv tsim ib pawg vector ntawm Dyn11.

Tsim los ua haujlwm hauv ib puag ncig hnyav nrog qhov siab ntawm 0-1800M, qhov kub thiab txias ntawm -5℃rau +45℃, thiab cov pa phem hnyav (saline lossis muaj pa luam yeeb), lub tshuab hluav taws xob no sib xyaw ua haujlwm zoo thiab kev teeb tsa tshwj xeeb kom tau raws li qhov xav tau ntawm traction substation fais fab mov tshuab.

Nrog lub peev xwm ntsuas ntawm 3MVA thiab qhov ntsuas qhov sib piv ntawm 88 / 11kV (ntau zaus 50 ± 2.5HZ), lub tshuab hloov pauv siv tooj liab windings rau superior conductivity thiab mechanical zog, ua ke nrog ONAN txias hom thiab Dyn11 kev twb kev txuas. Cov hluav taws xob tseem ceeb suav nrog qhov tsawg kawg nkaus impedance ntawm 8%, NLTC ntawm -load kais- hloov pauv (± 2 * 2.5%, padlockable), thiab tsis muaj -load / load poob ntawm 3.9kW / 20kW, kom ntseeg tau tias kev ua haujlwm zoo thiab ruaj khov. Nws tau nruab nrog kev tiv thaiv kev tiv thaiv, suav nrog ib qho -float gas relay (nrog lub tswb thiab cov neeg mus ncig ua si), overload thermal relay (ib puag ncig them nyiaj, teeb ntawm 115 degree), lub siab nyem valve, thiab kho tau tus pas ntsuas kub ntawm qhov ntsuas kub (ua rau ntawm 90 degree), muab ntau yam - lav.

Raws li txoj cai, lub transformer nta ib lub tank welded ua los ntawm ntau dua los yog sib npaug rau 6 hli steel phaj (16 hli puag phaj) thiab detachable kub -dip galvanized radiators, nrog ib tug grey tank thiab dawb conservator (125μm txheej rau hnyav cov pa phem). Nws yog tsim los tsis muaj chais tab sis nrog lub hauv paus ruaj khov tau sib xws nrog 1000mm-qhov sib txawv steel slides, thiab ua tau raws li IP55 tiv thaiv rau lub thawv davhlau ya nyob twg. Cov khoom nyob ruaj khov 3500mm hauv av clearance, thiab tag nrho cov bushings, rods, thiab terminals (Ntau tshaj los yog sib npaug rau 19mm rau thawj/secondary sib txuas) kom muaj zog txhua yam. Tsis tas li ntawd, lub tshuab hloov hluav taws xob tau tsim kho kom tiv taus txog li 27% tag nrho qhov hluav taws xob sib xyaw ua ke ntawm qhov qis -voltage winding, ua rau nws zoo tagnrho rau 11kV thiab 6.6kV kis tau tus mob kab hauv traction substations.

1.2 Technical Specification

3000kVA IEC 60076 fais fab transformers specifications hom thiab cov ntaub ntawv ntawv

1.3 Cov duab kos

3000 kVA traction transformer daim duab kos duab thiab loj.

02 Kev tsim khoom

2.1 Tank

Lub tank ntawm 3MVA-88/11kV IEC 60076 fais fab transformers nta welded tsim tau tshaj detachable kub-dip galvanized radiators, tsim los ntawm ntau dua los yog sib npaug rau 6 hli steel phaj (16 hli- tuab puag phaj). Nws yog txawm peem rau nrog bolted soj ntsuam npog / manholes nrog gasket seals thiab robust tuav, thiab los tsis muaj chais tab sis nrog ib tug ruaj khov puag rau mounting ntawm 1000mm-spaced steel slides embedded nyob rau hauv pob zeb. Painted grey nrog 125μm txheej rau cov pa phem hnyav, lub tank kuj suav nrog lub davhlau ya nyob twg sab nraud rau txuas 95mm² cables, kom ntseeg tau tias muaj kev ntseeg siab thiab yoog raws rau kev ua haujlwm hnyav.

2.2 Thermometers

Lub 3MVA-88/11kV IEC 60076 fais fab transformers yog nruab nrog ob lub ntsuas kub: lub dial - hom roj saum npoo tus pas ntsuas kub nrog cov kev sib cuag tau (feem ntau teem rau kev khiav hauj lwm ntawm 90 degree) thiab cov neeg mus ncig ua si rau 110V DC, 6A (pab txhawb relay tus pas ntsuas kub yog tias xav tau), thiab relay cua sov yog xav tau featuring ambient kub them, ib tug load-kub correlation, thiab mus txawv tebchaws hu preset ntawm 115℃nrog tib 110V DC, 6A ntsuam xyuas.

2.3 Tswj Box

Qhov no earthing transformer's control box yog ib tug ruaj khov stainless hlau enclosure nrog ib tug openable, latched qhov rooj. Sab hauv, nws muaj cov khoom siv dav hlau, cov khoom siv tswj me me (xws li, cov khoom siv hluav taws xob / cov khoom siv), thiab cov ntawv cim kab; sab nraud, ib qho "Exe-G2" kos npe yog tso tawm rau ntawm lub qhov txuas txuas, thaum lub corrugated cable caj pas nyob rau hauv qab pab kom huv si thaiv kev nkag, txhawb lub tsev tswj kev ua haujlwm thiab cov teeb liab kis tau tus mob.

2.4 Detachable kub-dip galvanized radiator

Lub 3MVA-88/11kV IEC 60076 fais fab transformers yog nruab nrog detachable kub-dip galvanized radiators: cov corrosion-resistant, zinc-coated Cheebtsam txuas mus rau lub tsev welded tank, khub nrog ONAN cua txias system kom ua hauj lwm zoo kingma{8} thiab tshem tawm tau yooj yim; lawv zoo- haum rau lub transformer hnyav, hnyav-pollution kev khiav hauj lwm tej yam kev mob.

2.5 LV TSI

Qhov qis-voltage porcelain bushing rau lub ntiaj teb transformer nta muaj zog, glazed porcelain insulator. Nws feem ntau yog flange-mounted rau ntawm lub tank transformer, nrog rau nws qis lub davhlau ya nyob twg stud ncaj qha mus rau hauv los yog cam khwb cia nyob rau hauv ib tug txuas, tag nrho encapsulated cable termination box. Qhov kev tsim qauv sib xyaw no muab kev hloov pauv ruaj khov, kaw, thiab tiv thaiv kev hloov pauv los ntawm kev hloov pauv hloov mus rau lub zog hluav taws xob sab nraud, kom ntseeg tau tias muaj kev ruaj ntseg thiab kev txij nkawm- tus phooj ywg kev sib txuas.

2.6 Roj Sampling Valve

Crafted los ntawm tooj dag, nws muaj zoo corrosion kuj thiab sealing kev cia siab, uas dlhos nrog transformer roj qhov nruab nrab kev khiav hauj lwm. Raws li ib feem tseem ceeb ntawm kev saib xyuas niaj hnub thiab kev saib xyuas, lub valve no tso cai rau cov neeg ua haujlwm kom yooj yim tshem tawm cov roj rwb thaiv tsev cov qauv: cov qauv no yog tom qab kuaj xyuas cov ntsuas xws li rwb thaiv tsev kev ua tau zoo, cov ntsiab lus ntawm cov dej, thiab cov impurity theem, pab soj ntsuam cov roj zoo thiab kev noj qab haus huv ntawm lub transformer. Nws compact, kaw tsim tsis tsuas yog tswj lub nruj ntawm cov roj system tab sis kuj enables ceev, ncaj qha kev khiav hauj lwm.

03 Kev Xeem

Qhov Kev Ntsuas Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob kuaj xyuas qhov tseeb ntawm txhua qhov kev tswj hwm theem nrab thiab kev saib xyuas circuits (piv txwv li, rau qhov ntsuas kub, lub tswb, lossis kev tswj kiv cua) los ntawm kev siv DC voltage, feem ntau 500V lossis 1000V, nruab nrab ntawm cov bundled thaiv thiab lub ntiaj teb. Kev ntsuas rwb thaiv tsev tiv thaiv, uas yuav tsum tau tshaj qhov tsawg kawg nkaus qhov pib (feem ntau 1-5 MΩ), ua kom tsis muaj teeb meem hauv av los yog txoj hauv kev ya raws uas tuaj yeem cuam tshuam qhov kev ntseeg tau ntawm kev tiv thaiv thiab kev saib xyuas, yog li tiv thaiv lub tshuab hluav taws xob txuas ntxiv ua haujlwm.

04 Site thiab Summary

Hauv cov ntsiab lus, lub ntiaj teb transformer ua haujlwm tseem ceeb hauv cov tshuab hluav taws xob niaj hnub, ua kom muaj kev nyab xeeb, ruaj khov, thiab kev ntseeg tau. Los ntawm kev muab cov ntsiab lus nruab nrab rau hauv av, nws muaj txiaj ntsig zoo tswj kev ua txhaum tam sim no, txwv tsis pub dhau qhov hluav taws xob, thiab txhim kho kev tiv thaiv ntawm ob qho tib si khoom siv thiab cov neeg ua haujlwm. Nws lub luag haujlwm yog qhov tseem ceeb hauv kev tswj hwm qhov system sib npaug thiab tiv thaiv kev puas tsuaj thaum lub sijhawm tsis sib npaug lossis ua txhaum. Raws li kev sib txuas hluav taws xob txuas ntxiv mus, qhov tseem ceeb ntawm qhov muaj zog thiab zoo - tsim cov kev daws teeb meem hauv av tseem yog qhov tseem ceeb rau kev tsim hluav taws xob ruaj khov thiab ruaj ntseg.