Txoj kev kuaj xyuas txoj kev kuaj xyuas
Peb tuaj yeem faib cov kev xeem ua peb pawg neeg tseem ceeb:
Visual & Kev Tshawb Xyuas Txhua Neeg
Kev kuaj hluav taws xob (de -} energized)
Kev kuaj hluav taws xob (energized)
1. Visual & Kev Tshuaj Ntsuam Xyuas Txhua Yam
Nov yog thawj kauj ruam thiab tseem ceeb tshaj plaws. Ntau cov teeb meem tuaj yeem nrhiav tau yam tsis muaj cov twj paj nruag.
Kev puas tsuaj ntawm lub cev:Check for cracks in bushings, leaks in welds or gaskets, dents in the tank, and signs of oil leakage (for oil-filled units).
Bushings & Terminals:Tshawb xyuas cov kab nrib pleb, kev paug, lossis taug qab cov cim. Ua kom muaj kev sib txuas yog huv thiab nruj.
Cov ntaub ntawv xa khoom:Txheeb xyuas tias cov ntaub ntawv npe (KVA, voltages, vector pawg {}}}}}} {, cov khoom noj khoom haus, tsis sib haum) phim daim ntawv thov yuav tsum tau ua.
Conservator & silica Gel:Rau cov roj -}}}}} pa hloov pauv, kos cov roj hauv cov neeg saib xyuas thiab ua kom cov pa roj cua thiab ua kom cov roj cua zoo nkauj (feem ntau xiav, tsis yog xim liab).
Tappings:Xyuas kom cov kais hloov pauv tau teem rau qhov chaw raug thiab txhua qhov sib txuas muaj kev ruaj ntseg.
GROUNDING:Paub meej tias qhov hloov pauv hluav taws xob thiab tseem ceeb tau txuas nrog lub ntiaj teb sib txuas.
2. Kev kuaj hluav taws xob (De -} energized)
Cov kev ntsuam xyuas no tau ua nrog tus hloov pauv cais.
A. Rwb thaiv tsev tsis kam kuaj (Megger Test Kuj)
Qhov kev ntsuas no tau kuaj cov rwb thaiv tsev ntawm wullings ntawm windings thiab ntawm windings thiab av.
Yuav ua li cas nws ua tiav:Ib melohmeter (megger) siv lub dc voltage (piv txwv li, 500v, 1000v, 2500V, lossis ntsuas qhov kev tawm tsam ntawm cov rwb thaiv tsev.
Tus txheej txheem:
HV rau hauv av:Txuas megger rau hv bushing (s) thiab av Lv Bushings thiab Tank.
LV rau hauv av:Txuas megger rau LV bushing (s) thiab hauv av HV bushings thiab tank.
HV RAU LV:Txuas megger rau hv bushings, txuas lv bushings ua ke, thiab hauv av lub tank.
Yuav ua li cas saib rau:Kuj yog qhov tseem ceeb yuav tsum muaj siab dua (feem ntau hauv Megaohm lossis GigaoHm ntau yam). Sib piv cov txiaj ntsig rau cov chaw tsim khoom tshwj xeeb, cov ntaub ntawv yav dhau los, lossis theem ntawm theem. Ib qho qis lossis cia li poob qis tsis kam qhia txog noo noo, paug, lossis rwb thaiv tsev puas.
B. Transformer hloov ntsuas piv (TTR xeem)
Qhov kev ntsuas no qhia txog tias tus hloov pauv tau muab cov hluav taws xob tseeb hloov kho thiab tsis muaj qhov luv.
Yuav ua li cas nws ua tiav:Tus TTR Tester siv lub voltage tsis tshua muaj voltage rau ib qho winding thiab ntsuas qhov ua rau cov khoom voltage ntawm lwm yam cua rau txhua theem. Nws suav qhov sib piv.
Tus txheej txheem:Ntsuam ntsuas qhov piv rau txhua theem (piv txwv li, thov voltage rau H1 thiab ntsuas X1, tom qab ntawd H2-X2, H3-X3). Ua qhov no rau txhua tus kais txoj haujlwm yog tias ua tau.
Yuav ua li cas saib rau:Qhov ntsuas ntsuas ntsuas yuav tsum tau ze rau ntawm lub npe piv rau txhua ntu thiab coj mus rhaub txoj haujlwm. Ib qho kev sib txawv tseem ceeb qhia tau luv luv lem, qhib kev ncig, lossis teeb meem nrog tus kais hloov.
C. winding tiv thaiv
Qhov kev ntsuas no tau kuaj cov kev ncaj ncees ntawm kev sib txuas, cov neeg hu, thiab tus cwj pwm nyob hauv lub windings.
Yuav ua li cas nws ua tiav:Ib micro -}} hiamieter tes testance thiab ntsuas qhov hluav taws xob tam sim no thiab hauv Milli {Ohms).
Tus txheej txheem:Ntsuas cov tsis kam ntawm theem ntawm tib sab (piv txwv li, H1-H2, H2-H3, H3-H1). Rov ua rau LV sab.
Yuav ua li cas saib rau:Cov tsis kam nqi rau tag nrho peb ntu yuav tsum tsis pub dhau 1-2% ntawm txhua lwm yam. Ib qho siab tshaj tawm hauv ib ntu qhia tias qhov kev sib txuas tsis zoo, qhov xoob ntawm tus coj hloov pauv, lossis tus neeg kos tsheb puas.
D. POLARITY THIAB VOV VOV
Qhov kev sim no lees paub tseeb ntawm tus neeg mob siab thiab LV windings ntawm HV thiab LV windings (piv txwv li 30℃rau Dyn11), uas yog qhov tseem ceeb rau kev ua haujlwm sib txawv.
Yuav ua li cas nws ua tiav:Qhov no tuaj yeem ua tiav nrog txoj kev voltage yooj yim lossis siv cov pab pawg vector tau ua.
Yooj yim txoj kev:Txuas ntxiv txuas tus HV thiab LV neutrals (yog tias muaj). Thov ib qho 3-theem voltage rau HV sab. Ntsuas cov volfages ntawm ntau hV thiab lv terminals. Tus qauv ntawm voltagages yuav paub meej tias cov pab pawg vector (piv txwv li, yyn0).
E. Dielectric nqus kev xeem (Polarization Performance index - pi)
Qhov no yog txuas ntxiv ntawm cov kev xeem megger thiab yog qhov zoo dua rau kev ntes cov dej noo thiab paug.
Yuav ua li cas nws ua tiav:Kev ntsuas Megger yog ua rau kev siv sijhawm ntev dua, feem ntau 10 feeb. Lub Polarization Performance index yog qhov piv ntawm 10 feeb tiv kev nyeem ntawv rau 1 feeb nyeem ntawv.
Yuav ua li cas saib rau:
PI> 2.0:Zoo, rwb thaiv tsev qhuav.
Pi 1.0 - 2.0:Rwb thaiv tsev uas tau nug.
Pi <1.0:Ntub lossis rwb thaiv tsev tsis huv (xav tau kev tshawb xyuas).
3. Kev kuaj hluav taws xob (energized / on {{1} le lead)
Cov kev ntsuam xyuas no tau ua tom qab txoj kev vam meej ({0}}}} Ending cov kev ntsuam xyuas thiab nrog tus hloov pauv.
A. Tsis {{- thau khoom (expitation) tam sim no xeem
Yuav ua li cas nws ua tiav:Txhawb ib qho winding ib (feem ntau lv (feem ntau lv (feem ntau lv) ntawm ntsuas voltage thiab ntau zaus, nrog rau lwm lub winding sab laug qhib - circuited. Ntsuas cov tam sim no nyob rau hauv txhua theem.
Yuav ua li cas saib rau:Tsis muaj {{{0} Gr} Luv tawm tam sim no feem ntau 0.5 -- nra tam sim no. Cov dej ntws hauv tag nrho peb ntu yuav tsum muaj kev sib npaug. Ib qho siab lossis tsis muaj kev thauj mus los tam sim no tuaj yeem qhia cov teeb meem zoo li luv, kev puas tsuaj ntawm tus kais.
B. Polarity Check (Volergized Txoj Kev)
Yuav ua li cas nws ua tiav:Qhov ntsuas yooj yim uas koj txuas ib lv undergroach rau tus neeg HV davhlau ya nyob twg (piv txwv li X1 rau H1). Thov ib qho 3-theem voltage rau HV sab. Ntsuas cov voltage ntawm cov seem uas unconnected HV thiab LV Terminals.
Yuav ua li cas saib rau:Yog tias cov voltage nyeem phim cov kev cia siab rau koj qhov kev sib txuas (ntxiv lossis sib cais), cov polarity yog qhov tseeb. Qhov no yog qhov tseem ceeb ua ntej sib hloov pauv hloov.
C. Nrauv thiab ntsuas kub
Qhov no feem ntau yog kev sim ua haujlwm tab sis tuaj yeem ua rau - xaib cov khoom siv tshwj xeeb.
Yuav ua li cas nws ua tiav:Ib qho kev simulated thauj tau thov rau lub transformer, thiab ntsuas kub ntawm cov windings thiab roj tau ntsuas kom txog thaum thermal equilibrium tau mus txog.
Yuav ua li cas saib rau:Qhov ntsuas kub yuav tsum tsis pub dhau qhov kev txwv uas tau sau tseg los ntawm cov qauv uas tau sau tseg los ntawm cov qauv (piv txwv li, 65℃rau windings) kom ntseeg tau tias qhov hloov pauv tau ntev.
Ntsiab lus hauv cov lus tseem ceeb
| Xeem Npe | Lub hom phiaj | Thaum Twg Siv |
|---|---|---|
| Kev Saib Xyuas Kev Pom | Nrhiav kev puas tsuaj lub cev, xau, xoob sib txuas. | Thawj kauj ruam, ib txwm. |
| Rwb Cevhij Kuj | Txheeb xyuas kev noj qab haus huv ntawm rwb thaiv tsev tseem ceeb. | Kev tu ib txwm muaj, tom qab kho. |
| Tig piv (TTR) | Txheeb xyuas qhov tseeb voltage piv & nrhiav kom tig. | Commissioning, daws teeb meem. |
| Cua tsis kam | Nrhiav kev sib txuas tsis zoo, qhib cov voj voog. | Commissioning, tom qab siv tav kev hloov kho. |
| Polarity / Vector Group | Paub meej theem kev sib raug zoo. | Ua ntej sib hlub, tom qab rov ua dua. |
| Polarization Performance index (pi) | Txheeb ya raws hauv rwb thaiv tsev. | Thaum ingurance ingress yog xav tias. |
| Tsis muaj {- ntim khoom tam sim no | Tshawb cov mob tseem ceeb thiab sib nqus Circuitts. | Kev daws teeb meem tseem ceeb / Magnetizing teeb meem |