Transformer bushings tuaj yeem muab faib ua pawg hauv qab no raws li lawv cov qauv rwb thaiv tsev, qib voltage, thiab kev ua haujlwm ib puag ncig. Ntawm lawv, capacitive bushings yog tam sim no hom tseem ceeb tshaj plaws nyob rau hauv siab -voltage thiab saum toj no systems.
Kev faib tawm los ntawm cov khoom siv rwb thaiv tsev thiab cov khoom siv
Porcelain Bushing: Siv cov plooj (porcelain) ua cov khoom siv hluav taws xob tseem ceeb. Nws muaj cov qauv yooj yim thiab feem ntau siv nyob rau hauv qis -voltage transformers ntawm 10kV thiab hauv qab no. Nws cov qauv sab hauv yog huab cua- rwb thaiv tsev, nrog cov pas nrig conductive dhau los ntawm cov plooj (porcelain bushing). Nws yog haum rau cov ntawv thov uas tsis tshua muaj rwb thaiv tsev yuav tsum tau. Txawm li cas los xij, vim qhov tsis sib xws ntawm cov hluav taws xob hauv hluav taws xob, nws yooj yim rau hluav taws xob teb nyob ze ntawm flange, txwv nws daim ntawv thov ntawm high voltages.
Roj-Filled Bushing: Sau cov plooj (porcelain bushing) nrog cov roj insulating los txhim kho kev ua haujlwm rwb thaiv tsev. Lub ntsiab rwb thaiv tsev muaj cov roj thiab cov ntawv insulating. Nws feem ntau yog siv nyob rau hauv transformers ntawm 35kV ~ 63kV. Txawm hais tias nws qhov kev ua tau zoo tshaj plaws ntawm cov plooj (porcelain bushings), nws yog qhov loj thiab ntau txoj hauv kev los tswj, thiab tau maj mam hloov los ntawm capacitive bushings.
Capacitive bushings siv lub hauv paus ntsiab lus ntawm capacitive voltage division. Ntau txheej ntawm aluminium ntawv ci thiab ntawv insulating (los yog daim kab xev nplaum) yog interleaved los ua ib tug "capacitor core," uas ua rau ib tug ntau yam radial thiab axial hluav taws xob teb tis thiab zoo heev tiv taus voltage. Lawv tau siv dav hauv 66kV thiab siab dua -voltage thiab ultra-high-voltage systems.
Roj-paper capacitive bushings: Lub hom phiaj tseem ceeb, muaj cov roj insulating, muab kev sib khi zoo thiab muaj zog rwb thaiv tsev siab.
Adhesive-paper capacitive bushings: Ib zaug siv nyob rau hauv cov tshuab saum toj no 66kV, tab sis vim qhov yooj yim ntawm cov nplaum nplaum, siab tanδ (dielectric poob), thiab ua rau muaj kev cuam tshuam rau ib feem, ntau lawm tau nres.
Qhuav- hom capacitive bushings: Cam khwb cia nrog epoxy resin, yuav tsum tsis muaj roj, ib puag ncig tus phooj ywg thiab kev saib xyuas-dawb, haum rau ib puag ncig tshwj xeeb xws li GIS (Gas Insulated Switchgear).
