Thaum DC muaj peev xwm siv thoob plaws qhov rwb thaiv tsev, qhov tshwm sim tam sim no yog tsim los ntawm ntau yamcov khoom raws li hauv qab no:
(1) Capacitance-them tam sim no. Capacitance-them tam sim no yog tam sim no los ntawm tus nqi absorbed los ntawm lub capacitor tsim los ntawm lub capacitance ntawm bushing. Qhov tam sim no yog lub luag haujlwm ntawm lub sijhawm uas tseem nyob ntawm qhov siv hluav taws xob, kev tiv thaiv hluav taws xob, thiab lub sijhawm tsis tu ncua ntawm Circuit Court.
(2) Dielectric-absorption tam sim no. Dielectric-absorption tam sim no yog tam sim no uas yog absorbed thiab dai nyob rau hauv lub dielectric thaum lub sij hawm them nyiaj ntawm cov khoom siv thiab tso tawm tom qab cov khoom tawm. Qhov tam sim no tuaj yeem xam los ntawm qhov ntsuas qhov ntsuas hluav taws xob, lub peev xwm, thiab lub sijhawm. Hauv cov tshuab cua txias thiab hydrogen-txias AC rotating tshuab, dielectric absorption txawv nrog kub.
(3) Surface leakage tam sim no. Qhov kev nkag ntawm tam sim no tshaj qhov chaw ntawm rwb thaiv tsev es tsis yog los ntawm nws lub ntim yog nto to tam sim no. Nyob rau hauv kev ntsuas cov rwb thaiv tsev ntawm armature thiab teb windings nyob rau hauv rotating machines (nyob rau hauv 1 hp, 750 W los yog ntau dua), ib tug siab nto ntws tam sim no feem ntau yog tshwm sim los ntawm noo noo los yog lwm yam ib feem ntawm cov conductive contamination tam sim no nyob rau hauv lub rotating tshuab.
(4) Ib nrab tso tawm (corona tam sim no). Qhov no yog ib hom kev tso tawm hauv zos uas tshwm sim los ntawm kev hloov pauv roj ionization nyob rau hauv ib qho hluav taws xob rwb thaiv tsev thaum lub zog hluav taws xob ntau tshaj qhov tseem ceeb. Kev tso tawm ib nrab tsis xav tau thiab yuav tsum tau muab tshem tawm. Nws yog tshwm sim los ntawm overstressing ntawm huab cua ntawm cov ces kaum ntse ntawm tus neeg xyuas pib vim yog high voltage test. Hauv cov kab hluav taws xob tiv thaiv hluav taws xob ( ntsuas> 5 kV), cov av noo lossis cua tuaj yeem ua rau cov corona tam sim no.
(5) Volumetric leakage tam sim no. Tam sim no uas ntws los ntawm lub ntim rwb thaiv tsev nws tus kheej yog ib tug volumetric to tam sim no. Nws yog qhov tam sim no uas yog qhov tseem ceeb hauv kev ntsuam xyuas qhov xwm txheej ntawm cov rwb thaiv tsev. Hauv cov kab hluav taws xob tiv thaiv hluav taws xob ( ntsuas> 5 kV), cov av noo, condensation, thiab nag lossis daus ntawm qhov kev txiav tawm tuaj yeem ua rau cov dej ntws tawm tam sim no thiab cov dej ntws tawm tam sim no. Nto to tam sim no thiab volumetric tam sim no ntxiv ua ke yog cov quotient ntawm cov ntaub ntawv voltage thiab rwb thaiv tsev tsis kam. Nyob rau hauv loj AC rotating tshuab ntsuas 10, 000 kVA lossis ntau dua thiab ntsuas 6000V lossis siab dua, noo noo, ntawm qhov kawg windings, ua rau cov dej ntws tawm tam sim no thiab volumetric leakage tam sim no tshwj xeeb tshaj yog thaum av tseem nyob ntawm winding. Txij li thaum lub rwb thaiv tsev yuav tsis muaj zog nyob rau lub sij hawm, lub hnub nyoog yuav ua rau muaj kev nce hauv ntau yam tam sim no thaum kuaj.
Txhawm rau ua qhov ntsuas DC, Wuhan Huayi lub tuam txhab hluav taws xob hluav taws xob tau tsim lub DC hipot tester. Cov khoom no siv cov txheej txheem tshiab, cov khoom siv tshiab thiab cov khoom siv tshiab nrog cov yam ntxwv ntawm lub zog tso zis siab, ntim me me, lub teeb yuag, thiab lwm yam. Nws yog nrog kev ua haujlwm ruaj khov tshaj-voltage, dhau-tam sim no, xoom txoj hauj lwm hloov kev tiv thaiv, {{2} }.75 lub sij hawm voltage latch muaj nuj nqi, yog nruab nrog ib lub sij hawm relay, thiab tuaj yeem teeb lub tswb nrov thaum kuaj. Tag nrho cov cuab yeej yog txhim khu kev qha, thiab yooj yim rau kev khiav lag luam thiab nqa, tshwj xeeb tshaj yog siv rau lub hwj chim department field tests.The DC voltage tuaj yeem ncav cuag 400KV, yooj yim rau kev khiav lag luam.