Los ntawm kev ntsuas qhov rwb thaiv tsev ntawm cov hluav taws xob hloov hluav taws xob, qee qhov teeb meem rwb thaiv tsev thiab lwm yam teeb meem ntawm lub transformer tuaj yeem kuaj pom tau zoo, xws li winding kov lub casing, kov cov tub ntxhais hlau, luv luv Circuit Court ntawm coils, thiab lwm yam. Yog li ntawd, thaum lub sij hawm overhauls los yog tom qab loj. kho, rwb thaiv tsev tiv thaiv yuav tsum tau ntsuas. Thaum ntsuas qhov rwb thaiv tsev ntawm lub zog hloov hluav taws xob, feem ntau ntsuas qhov hluav taws xob tiv thaiv hluav taws xob ntawm cov hluav taws xob hluav taws xob siab rau lub casing, qis-voltage coil mus rau lub casing, thiab nruab nrab ntawm high-voltage coil thiab low-voltage coil. Thaum lub sij hawm tseem ceeb lifting txij nkawm, kuj ntsuas qhov rwb thaiv tsev tsis kam ntawm cov core bolt mus rau cov tub ntxhais hlau. Feem ntau, 2500V megohmmeter raug xaiv los ntsuas qhov rwb thaiv tsev ntawm cov hluav taws xob hloov hluav taws xob. Txawm li cas los xij, thaum ntsuas qhov kev tiv thaiv kev tiv thaiv ntawm cov bolt mus rau cov tub ntxhais hlau, feem ntau xaiv 1000V megohmmeter.
Lub rwb thaiv tsev tsis kam ntawm lub zog hloov hluav taws xob cuam tshuam zoo heev los ntawm cov av noo thiab kub. Thaum cov av noo nce, qhov saum npoo thiab sab hauv nqus cov dej noo, cov dej ntws tam sim no nce, thiab rwb thaiv tsev tsis kam txo; Thaum qhov kub thiab txias, cov khoom siv hluav taws xob muaj peev xwm ua tau hluav taws xob ntau dua vim qhov kev ua kom zoo thermal zog, cov dej ntws tam sim no nce, thiab rwb thaiv tsev tsis kam txo. Yog li ntawd, cov rwb thaiv tsev tiv thaiv qhov ntsuas ntsuas ntawm qhov kub thiab txias sib txawv. Qhov siab dua qhov kub, qhov qis dua qhov rwb thaiv tsev.
Transformer rwb thaiv tsev cov qauv:
Ua ntej lub tshuab hloov tshiab tshiab los yog kho dua tshiab thiab lub sij hawm ntev decommissioned (peb lub lis piam) transformer yog muab tso rau hauv kev ua haujlwm, rwb thaiv tsev yuav tsum tau ntsuas.
Rau windings uas muaj qhov voltage siab tshaj 1000V, 2500V megohmmeter yog siv; rau windings hauv qab 1000V, 1000V megohmmeter yog siv. Tus nqi tiv thaiv (ntawm 20 degree) yog 300 megohms rau 3 - 10 kV, 400 megohms rau 20 - 35 kV, 800 megohms rau 63 - 220 kV, thiab 3000 megohms rau 500 kV. Rau transformers nrog ib tug voltage ntawm 0.4 kV thiab hauv qab no, ib tug 500V megohmmeter yog siv nrog ib tug kuj ntawm ntau tshaj los yog sib npaug zos rau 0.5 megohm.
Thaum tus nqi tiv thaiv qis dua 50% ntawm tus nqi dhau los, ceeb toom rau kev saib xyuas. Yog tias tsim nyog, ntsuas qhov dielectric poob thiab nqus piv ntawm lub transformer. Qhov nqus piv R60 "/ R15", thiab qhov sib piv yuav tsum tsis txhob qis dua 1.3.
Lub npe ntawm rwb thaiv tsev tsis kam: siab rau qis thiab hauv av: (thaum winding mus rau theem nrab winding thiab casing) rwb thaiv tsev tsis kam ntawm high-voltage winding mus rau qis-voltage winding thiab casing; Tsawg mus rau qhov siab thiab hauv av: (thib ob winding rau thawj winding thiab casing) rwb thaiv tsev tsis kam ntawm cov low-voltage winding mus rau high-voltage winding thiab casing.
Cov qauv tsim nyog rau qhov tsim nyog ntawm kev rwb thaiv tsev:
(1) Muab piv cov nqi hluav taws xob tiv thaiv hluav taws xob ntsuas lub sijhawm no nrog tus nqi ntsuas lub sijhawm dhau los hloov mus rau tib qhov ntsuas kub, tus nqi no yuav tsis raug txo los ntawm 30% piv rau tus nqi dhau los.
(2) Qhov sib piv ntawm qhov nqus R60 / R15 (qhov piv ntawm rwb thaiv tsev tsis kam ntawm 60 vib nas this thiab 15 vib nas this hauv kev ntsuas tej thaj chaw deb) yuav tsum yog 1.3 npaug lossis ntau dua ntawm 10 - 30 degree .
(3) Rau transformers nrog thawj sab voltage ntawm 10 kV, qhov tsawg kawg nkaus tsim nyog tus nqi ntawm rwb thaiv tsev kuj yog hais txog qhov kub thiab txias. Kev sib raug zoo ntawm transformer rwb thaiv tsev tsis kam thiab ntsuas kub.
Kev suav cov mis rau transformer rwb thaiv tsev tsis kam: Siv cov mis los xam cov rwb thaiv tsev ntawm ntau qhov kub thiab txias. "Rau txhua txhua 10 degree nce, ib nrab tus nqi dhau los; rau txhua txhua 10 degree txo, ob npaug ntawm tus nqi dhau los. Rau cov xwm txheej zoo, muab faib los ntawm 1.5." Absorption ratio: R20=Rt X 10^(t-20)/40. Rau txhua txhua 10 degree nce nyob rau hauv qhov kub thiab txias, Rt yog multiplied los ntawm 2/3. Rau txhua txhua 10 degree txo qhov kub, Rt yog muab faib ua 1.5.
Rau cov hloov tshiab thiab hloov kho tshiab, cov txiaj ntsig tsim nyog ntawm kev tiv thaiv kev tiv thaiv yuav tsum ua raws li cov cai saum toj no. Rau kev hloov pauv hauv kev ua haujlwm, nws yuav tsum tsis txhob qis dua 10 megohms.