500 kVA Peb-Phase Roj-Immersed Transformer Specifications: Cov Tsis Txaus Siab Cov Neeg Yuav Tsum Paub

Vim li cas Specifications Matter Tshaj li kVA Rating

500 kVA peb-theem roj-immersed transformer txuas nruab nrab-voltage network mus rau qhov chaw qis-voltage distribution. Qhov ntsuas kVA piav qhia tias lub zog muaj zog npaum li cas hauv chav tsev tuaj yeem xa mus tsis tu ncua raws li nws cov ntsuas cua txias, tab sis lub tshuab hloov pauv tsuas yog ua haujlwm kom raug hauv ib lub network tshwj xeeb yog tias qhov sib piv voltage, pawg vector, impedance thiab kev tiv thaiv kev sib txuas tau teev raug. engineers, procurement managers thiab neeg ua hauj lwm tag nrho yuav tsum tau nyeem cov specification daim ntawv nrog tib yam nruj, vim hais tias ib tug yuam kev nyob rau hauv ib qho ntawm cov tsis feem ntau nto tsuas yog tom qab installation, thaum nws kim heev kho.

Rated Capacity thiab Voltage Ratios

Qhov ntsuas 500 kVA yog lub zog tsis tu ncua ntawm qhov ntsuas hluav taws xob thiab zaus raws li tus qauv txias. Qhov ntsuas hluav taws xob sib npaug yog qhov tseem ceeb: kev teeb tsa ib txwm nqis los ntawm 11kV mus rau 400V, 20kV txog 400V, lossis 33kV rau 415V, nyob ntawm thaj tsam thiab kev sib txuas hluav taws xob. Cov txheej txheem rwb thaiv tsev, bushing creepage deb thiab kais ntau yuav tsum tau sib phim qhov tseeb thawj thiab theem nrab voltages ntawm qhov project. Tawm- cov kais dej hauv Circuit Court, feem ntau ± 2 x 2.5% lossis ± 5%, tso cai kho me me rau qhov sib txawv ntawm cov kab hluav taws xob hauv zos.

Frequency thiab Phase Configuration

Peb -theem 500 kVA units muaj rau 50Hz thiab 60Hz tes hauj lwm, thiab qhov zaus yuav tsum phim cov kab sib chaws hauv zos. Operating a 50Hz design on a 60Hz system increases core loss and can lead to overheating, while the reverse direction changes the flux density and magnetising current. Cov theem teeb tsa feem ntau yog peb-theem rau kev faib khoom lag luam, nrog rau qhov nruab nrab tawm ntawm qhov qis -voltage sab.

Vector Group thiab Impedance

Pawg vector txhais cov theem kev sib raug zoo ntawm high-voltage thiab low-voltage windings. Dyn11 yog qhov kev xaiv ntau tshaj plaws rau kev lag luam 500 kVA units vim hais tias lub delta - txuas thawj muaj peb - harmonic tam sim no, thiab lub hnub qub - txuas theem nrab nrog nruab nrab kev txhawb nqa ib zaug - theem loads thiab unbalanced load tej yam kev mob zoo dua Yyn0. Yyn0 tseem siv tau qhov twg lub network earthing kev npaj yuav tsum tau, tab sis rau kev lag luam kev faib tawm Dyn11 yog qhov kev pom zoo ua ntej.

Luv -circuit impedance (Uk%) yog qhov parameter uas txuas lub transformer mus rau qhov system tiv thaiv. Rau ib chav kawm 500 kVA, qhov tseem ceeb yog 4% txog 5%. Lub impedance siab dua txwv qhov txhaum tam sim no uas downstream breakers yuav tsum cuam tshuam, tab sis nws kuj nce voltage poob hauv load. Yog li ntawd, tus nqi xaiv yuav tsum tau koom tes nrog cov kev ntsuas ntawm qhov hloov pauv thiab qhov kev lees paub qhov hluav taws xob ntawm qhov kev teeb tsa.

Txias thiab rwb thaiv tsev

Feem ntau 500 kVA roj- cov chav nyob rau hauv dej siv ONAN txias: cov roj ntuj ncig los ntawm lub tank thiab radiator fins, nrog huab cua ntuj convection sab nraud. Cov roj ua haujlwm ua ob qho tib si coolant thiab dielectric. High-qib ntxhia insulating roj yog lub tshuab nqus tsev vacuum- puv kom tsis muaj cua npuas nyob rau hauv lub rwb thaiv tsev winding, uas yuav txwv tsis pub dhau los ua qhov chaw tso tawm ib nrab. Qhov kub nce yog txwv los ntawm cov chav kawm rwb thaiv tsev, nrog rau cov roj kub nce feem ntau nyob ze 60-65 K thiab winding nce nyob rau hauv cov chav kawm txwv ntawm daim ntawv rwb thaiv tsev, muab ib tug tsim lub neej ntawm kwv yees li 20-30 xyoo thaum loaded nyob rau hauv kev ntsuam xyuas.

Losses thiab Efficiency

Losses yog tus nqi tseem ceeb ntawm kev ua haujlwm ntawm lub transformer dhau nws lub neej. Tsis muaj-load poob (hlau poob) yog noj tsis tu ncua thaum lub tsev muaj zog, thiab nyob ntawm cov khoom tseem ceeb; txias-rolled grain-qhia silicon steel ua kom cov khoom no qis. Load poob (tooj liab poob) tshwm sim raws li cua sov hauv windings thiab nyob ntawm cov khoom siv winding thiab tam sim no. Cov chav kawm ua haujlwm niaj hnub no, raws li tau hais los ntawm cov qauv hauv cheeb tsam uas siv tau, tso cai rau cov neeg yuav khoom sib piv cov chav nyob ntawm lub neej- lub voj voog tus nqi es tsis yog thawj tus nqi ib leeg.

Tej yam Specification Summary

Lub Hoobkas kuaj thiab cov ntaub ntawv

Ua ntej xa khoom xa tuaj, chav tsev yuav tsum dhau qhov kev ntsuam xyuas niaj hnub ntawm tus qauv tsim: hloov pauv, winding tsis kam, tsis muaj -load poob thiab tam sim no, load poob thiab impedance, thiab dielectric withstand kev xeem. Daim ntawv tshaj tawm kev xeem lub Hoobkas, cov ntaub ntawv npe thiab daim duab kos duab ua ke ua cov ntaub ntawv xa tuaj uas tus neeg yuav khoom kuaj xyuas qhov kev txiav txim. Rau qhov project- kev teeb tsa tseem ceeb, ib daim ntawv tshaj tawm rau kev tsim qauv kuj tau thov kom paub meej tias luv luv -circuit withstand thiab kub- nce kev ua tau zoo.

Cov lus nug nquag

Q1. Dab tsi yog qhov txawv ntawm Dyn11 thiab Yyn0?Dyn11 muaj delta- txuas thawj zaug thiab lub hnub qub- txuas nrog theem nrab nrog 30- qib hloov pauv; Nws tuav cov loads tsis sib npaug thiab thib peb harmonics zoo. Yyn0 muaj lub hnub qub-kev sib txuas windings ntawm ob sab nrog xoom theem hloov thiab siv qhov twg lub ntiaj teb kev npaj yuav tsum tau, tab sis nws yog rhiab heev rau unbalanced loading.

Q2. 4% impedance txhais li cas rau kev tiv thaiv tsim?Nws txhais tau tias lub transformer nthuav tawm 4% impedance ntawm qhov ntsuas tam sim no, uas txiav txim siab qhov siab tshaj plaws luv luv -circuit tam sim no ntawm ob sab. Tus kws tshaj lij tiv thaiv siv tus nqi no rau qhov loj me thiab teeb tsa qhov qis -voltage breakers thiab txheeb xyuas lawv cov peev xwm cuam tshuam.

Q3. Lub 50Hz transformer puas siv tau ntawm 60Hz network?Feem ntau lub tshuab hloov hluav taws xob tuaj yeem ua haujlwm ntawm ntau zaus nrog txo cov flux ceev, tab sis tus qauv tsim yuav tsum tau ntsuas qhov voltage thiab poob. Hauv kev xyaum, cov chav nyob yog tsim rau qhov tshwj xeeb zaus, thiab siv qhov tsis zoo zaus invalidates qhov poob guarantees.

Q4. Yuav ua li cas tsis muaj -load poob txawv ntawm load poob?Tsis muaj-load poob yog lub zog siv los ua kom cov tub ntxhais sib nqus, nthuav tawm 24 teev hauv ib hnub thaum lub zog ua haujlwm tsis hais txog kev thauj khoom. Load poob yog proportional rau square ntawm lub load tam sim no thiab tshwm raws li cua sov nyob rau hauv lub windings.

Q5. Yuav ua li cas accessories yuav tsum tau teev nrog ib tug 500 kVA unit?Cov khoom siv ib txwm muaj xws li ntsuas ntsuas roj, ntsuas qhov ntsuas kub, ntsuas ntsuas ntsuas, ntsuas qhov ntws thiab ntsuas qhov ntsuas, thiab Buchholz relay thiab tus neeg saib xyuas rau tus neeg saib xyuas- hom qauv tsim. Kiv cua rau ONAF kev txawj ntse txawj ntse, tus kais hloov pauv thiab cov bushings tshwj xeeb tuaj yeem ntxiv rau ib qhov kev xav tau.

Q6. Cov qauv twg siv rau 500 kVA roj-immersed transformer?IEC 60076 series yog kev siv thoob ntiaj teb rau lub zog transformers; IEEE C57.12.00 yog qhov sib npaug North American siv. Lub teb chaws txawv xws li GB cov qauv hauv Suav teb ua raws li cov koob no rau kev faib khoom hloov pauv.