Kais changers tso cai rau transformer input thiab output voltages kom phim nrog rau cov seem ntawm lub hwj chim system los yog kho voltage theem ntawm lub hwj chim qhov chaw thiab cov neeg muas zaub. Lawv tso cai rau cov transformers siv rau hauv cov xwm txheej uas qhov kev tswj hluav taws xob yuav nyuaj heev yam tsis tau siv cov cuab yeej kim ntxiv..
Kais hloov pauv yog "tsis muaj load" (NL) lossis "hauv qab" (UL) tswj cov khoom siv. Tsis muaj load txhais tau hais tias lub transformer yuav tsum tau de-energized ua ntej tus neeg teb xov tooj yuav hloov kais txoj hauj lwm. Hauv kev thauj khoom txhais tau hais tias cov kais dej tuaj yeem hloov pauv thaum lub tshuab hloov hluav taws xob muaj zog thiab nqa lub zog. UL kais hloov pauv tso cai hloov pauv siv los ua cov khoom siv hluav taws xob tswj hluav taws xob; Txawm li cas los xij, lwm txoj hauv kev rau kev tswj hwm qhov hluav taws xob ntawm lub zog hluav taws xob yog los ntawm kev siv shunt capacitors thiab reactors siv circuit switchers thiab / lossis breakers los hloov lawv rau thiab offline.
Thaum qhov ntsuas Voltage Ratio, Impedance, Resistance, thiab TTR tests tab tom ua, tus kais hloov tshuab yuav tsum tau ua kom tau txais cov ntaub ntawv ntsuas hauv qab txhua qhov chaw kais dej. Thaum qhov ntsuas ntsuas tau ua tiav, txhua qhov ua tau kais dej yuav tsum tau kuaj xyuas rau NL thiab UL kais hloov pauv. Qhov no yog tshwj xeeb tshaj yog ib qho tseem ceeb rau ib tug tshiab transformer. Kev pab txwv tsis pub muaj nyob rau hauv cov chaw tsim khoom cov phau ntawv qhia rau cov neeg ua haujlwm uas tsis paub txog cov txheej txheem no.
Thaum kuaj NL kais hloov pauv, ib qho me me ntawm tam sim no yog siv los ua kom lub zog ntawm cov kais dej, thiab lub ntsuas ntsuas ntsuas cov zis winding tau ua tib zoo saib xyuas seb qhov twg windings raug tshem tawm thiab khaws thaum lub sijhawm hloov pauv. Qhov kev kuaj no yuav tsum tau siv los xyuas kom meej tias cov kais hloov pauv cov neeg sib txuas yog qhov nruab nrab zoo thiab tias lawv tau qhib thiab pleev xim rau ntawm qhov tseeb ntawm cov kais hloov pauv. Txhua tus kais hloov pauv yuav tsum muaj lawv cov neeg sib cuag ruaj khov thiab raug muab tso rau hauv qhov chaw kais. Ntawm qee tus kais hloov pauv, muaj qee lub caij nplooj ntoos hlav siab xav thaum hloov ntawm tus kais mus rau kais. Lub siab no yuav tsum tau ua raws li kev ua haujlwm ntawm tus kheej (NL) kais hloov pauv thaum tsiv ntawm ib txoj haujlwm mus rau lwm qhov, nce lossis nqis. Nco ntsoov tias NL kais hloov pauv tsim qhov qhib Circuit Court thaum hloov pauv hloov pauv. Yog tias lawv tsis tshwm sim ua haujlwm kom raug, tshawb xyuas!
Thaum kuaj UL kais hloov pauv, qhov kev tawm dag zog tam sim no yuav tsum tau saib xyuas tas lixyuas kom tseeb tias lub winding yeej TSIS qhib-circuited. Lub kais-changer mechanism checklistyog ib qho kev qhia tseem ceeb los xyuas kom meej tias tag nrho cov kev ntsuam xyuas tseem ceeb tau ua tiav. Daim ntawv teev npe no yog qee qhov piav qhia tus kheej, thiab cov ntawv txheeb xyuas tuaj yeem ua tauua tiav yam tsis muaj cov lus qhia ntxaws.
Ob qho tib si hauv zos thiab chaw taws teeb ua haujlwm thiab qhia txog UL kais hloov pauv yuav tsum raug txheeb xyuas. Kev ua haujlwm nyob deb ntawm lub tsev tswj yuav tsum tau sim ua kom tiav. Cov kev txwv ntawm kev tswj yuav tsum tau kuaj xyuas kom pom tias tus kais hloov pauv yuav tsis mus dhau nws qhov nres. Xyuas SCADA tswj tag nrho cov kev khiav hauj lwm ntau yam. Xyuas kom meej tias cov ntawv nyeem hauv zos thiab thaj chaw deb sib phim. Tshawb xyuas kev ua haujlwm nrog kev tswj xyuas kev txiav tawm hauv ob qho tib si "on" thiab "tawm" txoj haujlwm.