Nkag siab Peb -Phase Transformer Connections
Peb -theem transformer kev sib txuas yog nyob rau hauv lub plawv ntawm zoo nkauj npaum li cas txhua txhua niaj hnub fais fab system. Lawv yog dab tsi ua rau nws ua tau kom nce voltages nce lossis nqis kom zoo thaum ua kom txhua yam sib npaug ntawm cov nroj tsuag, nroog, thiab txawm tias peb lub tsev. Txoj kev uas koj txuas cov thawj thiab theem nrab windings-txawm nyob rau hauv lub hnub qub los yog delta- muaj kev cuam tshuam loj heev rau voltages, tam sim no, grounding, harmonics, thiab yuav ua li cas ntseeg tau tias tag nrho cov khiav. Ua kom zoo, thiab koj qhov system nyob twj ywm du. Ua tsis ncaj ncees lawm, thiab koj tab tom saib qhov tsis sib xws, kev poob ntxiv, lossis txawm tias cov khoom puas tsuaj.
(Nyem daim duab kom paub ntxiv.)
Muaj ob txoj hauv kev los txuas cov windings: lub hnub qub (Y lossis wye) thiab delta (Δ).
Nyob rau hauv lub hnub qub kev sib txuas, peb windings sib ntsib ntawm ib qho chaw nruab nrab. Kab voltage yog √3 npaug ntawm theem voltage, tab sis kab tam sim no sib npaug rau theem tam sim no. Qhov no ua rau koj yooj yim nruab nrab rau hauv av thiab ua rau nws yooj yim dua los muab ob qho tib si -theem thiab peb-theem loads. Delta, ntawm qhov tod tes, txuas cov windings hauv ib daim duab peb sab kaw. Ntawm no, kab voltage sib npaug theem voltage, tab sis kab tam sim no yog √3 zaug siab dua. Delta yog qhov zoo ntawm kev cuam tshuam nrog cov khoom tsis sib npaug thiab ib txwm nthuav dav peb qhov sib haum xeeb hauv lub voj kom lawv tsis txhob khiav mus rau hauv cov kab.
Los ntawm ob lub tsev thaiv no, peb tau txais plaub lub ntsiab peb -theem transformer txuas:
Hnub qub-Star (Y-Y)Ob tog yog hnub qub- txuas. Koj tau txais qhov nruab nrab ntawm ob qho tib si thawj thiab theem nrab, uas yog qhov tseem ceeb rau kev ua haujlwm siab -voltage vim tias txhua qhov winding tsuas pom kab hluav taws xob faib los ntawm √3. Qhov ntawd txhais tau tias pheej yig dua rwb thaiv tsev. Qhov downside? Nws tsis nyiam cov loads tsis sib npaug - nruab nrab tuaj yeem hloov pauv thiab koj tuaj yeem tau txais qhov tsis sib xws. Thib peb harmonics kuj tuaj yeem ua rau muaj teeb meem yog tias koj tsis ua tib zoo tuav hauv av. Nws ua haujlwm zoo tshaj plaws yog tias cov loads zoo sib npaug.
Delta -Delta (Δ-Δ)Ob sab hauv delta. Qhov kev teeb tsa no nyuaj thiab zam txim nrog cov khoom tsis sib npaug. Yog tias ib theem poob qis, koj tuaj yeem khiav hauv qhib -delta ntawm li 58% muaj peev xwm. Harmonics nyob twj ywm. Qhov kev ntes yog tias txhua qhov winding pom tag nrho cov kab hluav taws xob, yog li rwb thaiv tsev nqi ntau dua thiab tsis muaj qhov nruab nrab.
Hnub qub-Delta (Y-Δ)Lub hnub qub ntawm lub hauv paus, delta ntawm lub thib ob. Feem ntau heev rau kauj ruam -down transformers. Koj tuaj yeem ua rau thaj tsam siab -voltage sab zoo, thiab lub delta pab ntxiab harmonics. Txawm li cas los xij, muaj 30℃hloov mus rau hauv siab.
Delta-Star (Δ-Y)Qhov no yog tej zaum qhov nrov tshaj plaws uas koj yuav pom nyob rau hauv kev faib tawm. Delta ntawm qhov siab -voltage sab, lub hnub qub nrog nruab nrab ntawm qhov qis -voltage sab. Nws muab rau koj tias txhua yam - tseem ceeb nruab nrab rau cov tsev thiab cov khoom me me thaum lub delta thawj tswj kev sib haum xeeb thiab qhov tsis sib xws tiag tiag. Ntxiv dua thiab, cia siab tias 30℃theem hloov.
Cov kev hloov theem no tsis yog cov ntsiab lus qhia xwb-lawv tseem ceeb heev thaum koj sib piv cov transformers. Yog vim li cas engineers sivpawg vectorzoo li Dyn11, Yd1, thiab lwm yam. Cov cai qhia rau koj raws nraim li cas txuas nrog qhov twg thiab ntau npaum li cas qib qis qis qis lossis kev coj ua ( moos cim ua kom yooj yim rau nco).
Dhau li ntawm tus qauv plaub, muaj ob peb qhov kev hloov pauv muaj txiaj ntsig. Qhib-delta (V-V) tso cai rau koj khiav peb -theem fais fab nrog ob lub transformers nkaus xwb-pab rau kev teeb tsa ib ntus lossis lub teeb loads. Zig-zag kev sib txuas yog qhov zoo heev thaum koj xav tau cov av zoo tiag tiag lossis kev lim dej sib haum xeeb ntxiv.
Xaiv txoj cai peb -theem transformer kev sib txuas tsis yog ib qho - loj- haum- txhua yam.
Nws nyob ntawm koj qib voltage, qhov sib npaug (lossis tsis sib npaug) koj cov loads, seb koj xav tau qhov nruab nrab, thiab ntau npaum li cas cov pa phem uas koj tab tom cuam tshuam nrog. Hauv kev xyaum,Dyn 11(delta thawj, lub hnub qub thib ob nrog nruab nrab) tau dhau los ua - mus rau feem ntau cov transformers vim nws tsuas yog ua haujlwm zoo rau tiag tiag - ntiaj teb cov xwm txheej.
Harmonics yog mob taub hau loj hnub no nrog tag nrho cov khoom siv hluav taws xob thiab VFDs nyob ib puag ncig. Qhov ntawd yog lwm qhov laj thawj delta windings muaj txiaj ntsig zoo -lawv ntxiab cov triple -n harmonics ua ntej lawv ua teeb meem txuas ntxiv mus.
Thaum txhim kho lossis tswj cov transformers no, nco ntsoov muab ob npaug rau - xyuaspolarity, vector pawg, thiab lem ratio. Kev tsis sib haum xeeb tuaj yeem ua rau muaj kev cuam tshuam loj heev thiab kub dhau. Kev saib xyuas tsis tu ncua -Kev ntsuas hluav taws xob, kev kuaj roj, ntsuas thermal- mus ntev heev hauv kev ntes cov teeb meem ntxov.
Koj yuav pom cov kev sib txuas no nyob txhua qhov chaw: nce qhov hluav taws xob ntawm cov chaw tsim hluav taws xob, nqis los ntawm cov chaw nres tsheb, khiav lub cev muaj zog hauv cov chaw ua haujlwm, thiab sib koom ua ke hnub ci thiab cua ua liaj ua teb rau hauv daim phiaj. Raws li peb txav mus rau qhov ntse dua, cov tshuab hluav taws xob ntsuab, kom tau txais cov kev sib txuas zoo no tseem ceeb dua.
Thaum kawg, peb -theem transformer kev sib txuas yuav zoo li lub ntsiab lus qhuav, tab sis lawv zoo siab heev thaum koj pom tias lawv ntsiag to ua rau peb lub ntiaj teb hluav taws xob ua haujlwm zoo. Txawm hais tias koj yog tus engineer tsim lub chaw nres tsheb tshiab lossis tsuas yog ib tus neeg xav nkag siab tias lub zog nkag mus rau koj lub qhov (socket) li cas, paub txog qhov muaj zog thiab quirks ntawm Y-Y, Δ-Δ, Y-Δ, thiab Δ-Y teeb tsa ua rau koj nkag siab zoo dua ntawm tag nrho cov kab ke.
