Yuav Ua Li Cas Rau Nruab Epoxy Resin Through-wall Bushings?

Qhov kev teeb tsa ntawmepoxy resin hla phab ntsa bushingsyog kev ua haujlwm hluav taws xob uas raug thiab tswj hwm nruj me ntsis, feem ntau muab faib ua ob qho xwm txheej: pre-embedded (ntsia tib lub sijhawm thaum lub sijhawm tsim phab ntsa) thiab post-embedded (ntsia tom qab tsim phab ntsa). Cov hauv qab no yog cov kauj ruam kev teeb tsa dav dav thiab cov ntsiab lus tseem ceeb raws li cov qauv kev lag luam (xws li GB 50149-2010, DL / T 5221-2016).

I. Cov Kauj Ruam Txhim Kho Dav Dav
1. Kev Npaj Ua Ntej Kev Teeb Tsa
Kev txheeb xyuas qhov parameter: Paub tseeb tias qhov voltage, tam sim no, thiab qhov deb ntawm lub bushing yog sib xws nrog cov duab kos, thiab xyuas seb puas muaj qhov tawg lossis puas tsuaj rau ntawm qhov tsos.
Kev Ntsuas thiab Kev Tso Chaw: Siv lub laser theem lossis kab chalk los cim kab nruab nrab ntawm phab ntsa kom ntseeg tau qhov tseeb ntawm qhov chaw thiab zam kev ntxhov siab rau ntawm lub busbar lossis cable thaum yuam kom dhau tom qab.
Kev ua qhov: Lub qhov loj feem ntau yog 5-10 hli loj dua li lub qhov loj sab nraud ntawm lub bushing kom tso cai rau kev kho thiab sau cov ntaub ntawv sealing. Ntug ntawm lub qhov yuav tsum tau du thiab tshem tawm cov burrs kom tiv thaiv kev puas tsuaj rau lub cable lossis bushing nto.
2. BushingKev Sib Txuas thiab Kev Sib Txuas
Txoj Kev Kho: Rau cov epoxy resin bushing nrog cov hlau flanges (xws li aluminium alloy flanges), cov ntsia hlau nthuav dav lossis cov khoom siv tshuaj lom neeg feem ntau yog siv los kho cov flanges ntawm ob sab ntawm phab ntsa. Lub sijhawm kho kom raug pom zoo yog ≤ 300mm kom ntseeg tau tias lub bushing tsis xoob thaum lub sijhawm ua haujlwm co.
Sealing Filling: Qhov no yog ib kauj ruam tseem ceeb rau kev tiv thaiv dej, tiv thaiv hluav taws, thiab tiv thaiv nas.
Kev Sau Qhov Sib Txawv: Qhov sib txawv ntawm lub bushing thiab phab ntsa yuav tsum tau sau nrog cov tshuaj putty uas tiv taus hluav taws lossis cov tshuaj sealant uas tiv taus hluav taws, nrog rau qhov tuab uas pom zoo ntawm ≥ 20mm kom ntseeg tau tias muaj qhov sib txawv thiab tsis muaj qhov sib txawv.
Kev Kho Mob Dej Tsis Tau: Rau kev nkag mus rau sab nraum zoov phab ntsa lossis hauv qhov chaw ntub dej, qhov kawg sab nraud ntawmlub bushingyuav tsum tau nqes mus rau hauv qab ntawm 15° - 30°, thiab yuav tsum tau muab lub hau tiv thaiv dej kom tiv thaiv dej nag kom tsis txhob ntws rov qab.
3. Kev ntxig thiab kev sib txuas ntawm tus neeg xyuas pib
Kev Tiv Thaiv Kev Ntxig: Ua ntej ntxig cov busbars lossis cov cables, xyuas seb phab ntsa sab hauv ntawm lub bushing puas du. Rau cov cables, nws raug pom zoo kom muab tso rau ntawm lub raj tiv thaiv (xws li lub raj corrugated) ntawm ntu ntxig kom tiv thaiv cov npoo ntse los ntawm khawb cov txheej rwb thaiv tsev.
Kev Txuas Nruj: Thaum txuas lub davhlau ya nyob twg, cov bolts yuav tsum tau nruj kom nruj rau qhov torque tus qauv kom tsis txhob muaj cua sov hauv zos vim tsis sib cuag zoo. Tom qab txuas, xyuas seb lub nplhaib sib khi puas zoo kom tiv thaiv cov dej noo nkag mus.
4. Kev Ntsuas Tom Qab Kev Teeb Tsa
Kev Ntsuas Rwb Thaiv Tsev: Tom qab kev teeb tsa, qhov kev tiv thaiv rwb thaiv tsev yuav tsum tau sim nrog 2500V megohmmeter. Tus nqi tsim nyog feem ntau yog ≥1000MΩ (lossis raws li cov qauv tshwj xeeb).
Kev Ntsuas Hluav Taws Xob Uas Tiv Tauj Tau: Rau cov bushings uas muaj hluav taws xob ntau (xws li 10kV thiab siab dua), yuav tsum tau ua qhov kev ntsuas hluav taws xob uas tiv taus hluav taws xob (piv txwv li, 10kV bushing raug 42kV / 5 feeb yam tsis muaj kev tawg).
II. Cov Kev Ceev Faj Tseem Ceeb
Tsis Muaj Kev Sib Tw Ntaus: Txawm hais tias epoxy resin muaj zog heev, nws qhov kev tiv thaiv kev cuam tshuam tsis zoo li hlau. Thaum lub sijhawm teeb tsa, nws raug txwv tsis pub ntaus lub cev bushing ncaj qha nrog rauj lossis lwm yam khoom tawv kom tiv thaiv cov kab nrib pleb me me hauv cov txheej rwb thaiv tsev sab hauv, uas tuaj yeem ua rau muaj kev tawm ib nrab.
Kev Tiv Thaiv Dej Ntsws thiab Kev Ntxuav: Ua ntej kev teeb tsa, so cov nplaim sab hauv thiab sab nraud ntawm lub bushing nrog cawv anhydrous kom ntseeg tau tias tsis muaj hmoov av lossis roj. Thaum ua haujlwm hauv huab cua noo noo, siv cov txheej txheem tiv thaiv dej noo kom tiv thaiv cov dej noo los ntawm kev cuam tshuam rau kev ua haujlwm rwb thaiv tsev.
Kev Tso Cai Rau Kev Nthuav Dav Thiab Kev Ncua Ntev: Rau cov chaw uas muaj cov pob qij txha nthuav dav lossis qhov sib txawv ntawm qhov kub thiab txias loj, yuav tsum muaj 10-15 hli kev tso cai rau kev nthuav dav thiab kev sib cog lus ntawm lub bushing thiab tus neeg coj, lossis yuav tsum tau teeb tsa lub roj hmab compensator kom tiv thaiv kev hloov pauv ntawm lub bushing vim yog kev nthuav dav thiab kev sib cog lus thermal.
Cov Kev Cai Av: Yog tias lub bushing muaj lub hlau tiv thaiv lossis hlau flange, nws yuav tsum tau grounded txhim khu kev qha, thiab qhov kev tiv thaiv av yuav tsum yog ≤4Ω kom tshem tawm qhov hluav taws xob induced.
III. Kev Tswj Xyuas Qhov Chaw Tshwj Xeeb
Kev Teeb Tsa Ua Ke: Ua ntej nchuav phab ntsa pob zeb, lub bushing yuav tsum tau muab tso rau hauv qhov chaw. Lub sijhawm no, yuav tsum tau them sai sai rau qhov tseeb ntawm qhov chaw kom tiv thaiv lub bushing kom tsis txhob txav mus los thaum lub sijhawm nchuav. Ob qho kawg ntawm lub bushing yuav tsum tawm ntawm phab ntsa ntau dua 50 hli kom yooj yim rau kev kho mob sealing hauv theem tom qab.
Kev Teeb Sab Nraum Zoov: Cov bushings sab nraum zoov feem ntau muaj cov ris tsho tiv thaiv kev ua qias tuaj. Thaum lub sijhawm teeb tsa, xyuam xim rau qhov kev taw qhia ntawm cov ris tsho (feem ntau yog nqes mus rau hauv qab), thiab tsis tu ncua ntxuav cov av ntawm cov ris tsho kom tiv thaiv kev ua qias tuaj vim muaj hmoov av sib sau ua ke.
Cov Lus Qhia Txog Kev Nyab Xeeb: Kev teeb tsa yuav tsum tau ua thaum tsis muaj hluav taws xob, thiab yuav tsum dai daim paib ceeb toom "Tsis Txhob Kaw". Kev teeb tsa cov bushings hluav taws xob siab raug pom zoo kom cov kws kho hluav taws xob tsim nyog ua haujlwm.

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