Kev tshuaj xyuas qhov muag
Cov kev ua txhaum hauv qab no tuaj yeem kuaj pom los ntawm kev kuaj pom.
(1) Insulator tawg, daim tiab tsis xws luag, thiab flange tsis xws luag;
(2) Corrosion, hnav thiab deformation ntawm kho vajtse;
(3) Bolts thiab ceev yog xoob;
(4) Arc kab nyob rau hauv insulators thiab kho vajtse;
(5) Creepage kab thiab discoloration cim;
(6) Saib seb puas muaj lub zog sib txuas sib txuas hloov xim thiab saib xyuas qhov kub thiab txias nrog rau qhov ntsuas kub ntawm cov yeeb yaj kiab, ntsuas kub ntsuas xim lossis ntsuas kub infrared.
Ntsuas nrog ntsuas thiab ntsuas
Kev ntsuas kev tiv thaiv hluav taws xob: Cov txheej txheem yog siv cov ntsuas hluav taws xob tiv thaiv hluav taws xob (1000V megohmmeter lossis lwm yam) los ntsuas cov rwb thaiv tsev tiv thaiv. Txawm hais tias ib txwm rwb thaiv tsev bushings feem ntau ntau dua 2000MΩ, thaum qhov chaw ntawm lub rwb thaiv tsev yog stained thiab ntub dej, nws yuav qhia tau tias tus nqi qis heev, yog li thaum ntsuas, nws yog ib qho tseem ceeb uas yuav tsum tau ua kom lub rwb thaiv tsev nto huv si thiab qhuav. Nws tseem yuav tsum tau muab sau tseg tias txoj kev no yuav tsum tau ua thaum txoj kab tsis muaj zog.
Kev ntsuam xyuas qhov tsis pom kev nkag mus: Feem ntau cov kab nrib pleb hauv cov insulators pib ntawm qhov chaw. Txawm li cas los xij, cov kab nrib pleb me me yog qhov nyuaj rau kev txheeb xyuas los ntawm kev tshuaj xyuas qhov muag. Thaum xav tias muaj kab nrib pleb, kev ntsuam xyuas nkag mus tau zoo. Qhov kev kuaj pom qhov tsis zoo yog txhawm rau txhawm rau me me qhov khoob hauv cov xim daj-ntsuab glow nkag mus rau cov kua lossis xim liab nkag mus rau cov kua kom pom qhov khoob kom pom tseeb. Yog li ntawd, kev txiav txim yuav ua tau los ntawm cov xim clarity ntawm lub penetrant nyob rau hauv cov kab nrib pleb.
Ua rau flashover tso tawm xwm txheej hauv insulators
Muaj av nyob rau saum npoo ntawm lub insulator thiab sab hauv thiab sab nraud ntawm daim tiab plooj (porcelain). Tom qab ntub dej, lub zog compressive yuav raug txo, ua rau kom cov dej ntws tawm mus ntxiv. Thaum nws ncav cuag ib qho nqi, qhov chaw tawg tawg yuav tshwm sim. Txawm hais tias cov av nyob rau saum npoo ntawm lub insulator thiab sab hauv thiab sab nraud ntawm lub plooj (porcelain skirt) me me, nws yog vim qee yam ntawm overvoltage tshwm sim hauv lub zog hluav taws xob, uas ua rau flashover tawm ntawm qhov chaw insulating nyob rau hauv qhov kev txiav txim ntawm overvoltage. . Lub ntsiab tsis xws luag ntawm insulators yog insulator tawg, tiab tsis xws luag, flange puas, pob lub taub hau corrosion thiab deformation, kab mob creepage kab, fasteners ntog thiab xoom qhov tseem ceeb.
Thaum lub sijhawm ua haujlwm ntawm lub rwb thaiv tsev, muaj kev sib cuam tshuam ntawm kev sib tshuam xws li hluav taws xob, khoom siv hluav taws xob, hloov pauv kub thiab txias, noo noo thiab qias neeg gases, nrog rau qhov tsis zoo ntawm lub insulator nws tus kheej. Cov phenomena txawv txawv uas nthuav tawm kuj muaj ntau haiv neeg. Thaum cov insulators nrog cov teeb meem saum toj no pom, qhov xwm txheej tshwj xeeb yuav tsum tau txheeb xyuas thiab kawm thiab sijhawm yuav tsum tau teem sijhawm rau kev ua haujlwm. Insulators nrog porcelain zoo tawg thiab xoom qhov tseem ceeb yuav tsum tau hloov sai li sai tau los tiv thaiv kev sib tsoo ntawm kev nthuav dav, thiab cov insulators uas tsis muaj flashover tawm yuav tsum tau ntxuav.
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