Transformer Capacity Calculation thiab Rated Current Calculation
Transformer Capacity suav nrog
Ua ntej, xaiv qhov ntsuas voltage ntawm lub transformer. Qhov hluav taws xob ntawm sab hluav taws xob siab yog sib npaug ntawm qhov hluav taws xob ntawm kab sib txuas, thiab qhov hluav taws xob ntawm qhov hluav taws xob qis yog 10 feem pua lossis 5 feem pua siab tshaj qhov hluav taws xob ntawm kab hluav taws xob ntawm sab qis-voltage (nyob ntawm qhov voltage theem ntawm transformer thiab impedance voltage.
Txhawm rau xam qhov loj ntawm lub thauj khoom nqa los ntawm lub tshuab hloov pauv, nws yuav tsum suav qhov siab tshaj plaws kev thauj khoom thiab hloov kW tus nqi ntawm cov khoom nquag mus rau qhov pom tseeb zog kVA. Yog tias muaj ob lub tshuab hloov pauv, ces lub peev xwm ntawm txhua qhov hloov pauv tuaj yeem xaiv tau raws li 70 feem pua ntawm qhov siab tshaj plaws kev thauj khoom, thiab ib qho kev hloov pauv yuav tsum tau txiav txim siab raws li tag nrho cov khoom thauj, nrog rau cov npoo tsim nyog. Lwm cov khoom lag luam nto moo tuaj yeem txiav txim siab ua ke nrog cov khoom siv hluav taws xob.
Piv txwv li: xaiv 35/10kV transformer. Piv txwv tias qhov siab tshaj plaws load yog 3500kW, lub hwj chim yam yog 0.8, ob transformers raug xaiv, lub peev xwm S=0.7 × 3500/0.8=3062kVA thiab transformer ntawm 3150kVA tuaj yeem xaiv, thiab qhov sib piv voltage yog 35kV / 10.5kV. Tom qab ntawd xaiv tus qauv los ntawm cov khoom catalog.
Transformer muaj peev xwm suav cov mis:
1, xam lub zog siab tshaj plaws rau ib theem ntawm kev thauj khoom
Ntxiv lub zog thauj khoom ntawm txhua theem ntawm A-theem, B-theem, thiab C-theem ntawm nws tus kheej. Piv txwv li, tag nrho lub zog ntawm A-theem load yog 10KW, tag nrho lub zog ntawm B-theem load yog 9KW, tag nrho lub zog ntawm C-theem load yog 11KW, thiab tus nqi siab tshaj plaws yog 11KW. (Faj seeb: Lub hwj chim ntawm txhua lub cuab yeej ib zaug yog xam raws li tus nqi siab tshaj plaws ntawm daim ntawv teev npe, thiab peb theem ntawm cov cuab yeej hluav taws xob tau muab faib los ntawm 3, uas yog sib npaug rau lub zog ntawm txhua theem ntawm cov cuab yeej no.)
Piv txwv li: C-theem load tag nrho fais fab=computer 300W x 10 units) plus (cua txias 2KW x 4 units)=11KW
2, Xam peb lub zog tag nrho
11KW × 3-theem=33KW (transformer peb-theem tag nrho lub zog)
3, Xam tag nrho lub zog ntawm lub transformer
Peb-theem tag nrho lub zog / 0.8 yog kauj ruam tseem ceeb tshaj plaws. Tam sim no, ntau dua 90 feem pua ntawm cov transformers muag ntawm lub khw muaj lub zog ntawm tsuas yog 0.8, yog li nws yuav tsum tau muab faib los ntawm lub zog ntawm 0.8.
33KW / 0 8=41.25KW (tag nrho transformer fais fab)
4, Xam tag nrho transformer muaj peev xwm
Tag nrho lub zog ntawm lub transformer / 0.85, raws li "Power Engineering Design Manual", lub peev xwm ntawm transformer yuav tsum raug xaiv raws li kev suav load. Rau ib qho kev hloov pauv nrog lub zog ruaj khov, tus nqi thauj khoom feem ntau yog li 85 feem pua.
41.25KW/0.85=48.529KW (transformer fais fab yuav tsum tau yuav), ces koj tuaj yeem xaiv 50KVA transformer thaum yuav khoom.
