TRANSFORMER BUSHINGS

Dab tsi yog bushings?

Hluav taws xob bushings yog cov khoom tseem ceeb rau ntau yam khoom siv hluav taws xob xws li transformers, shunt reactors thiab switchgears. Cov khoom siv no muab qhov tsim nyog insulative barrier ntawm tus neeg xyuas pib nyob thiab cov khoom siv hluav taws xob ntawm lub tshuab hluav taws xob hauv av. Qhov kev ua haujlwm tseem ceeb no tso cai rau cov bushings nqa tam sim no ntawm high voltage los ntawm conductive barrier ntawm cov khoom enclosures. JIEOZU bushings yog tsim los tiv thaiv hluav taws xob tsis ua hauj lwm los ntawm flashover lossis puncture, txwv tsis pub kub nce nrog qhov ntsuas tam sim no, thiab tiv thaiv cov neeg kho tshuab quab yuam los ntawm cable load thiab thermal expansion.

Internal rwb thaiv tsev ntawm ib tug bushing yuav tsum tau tiv thaiv hluav taws xob kev nyuaj siab nws yuav enduring nyob rau hauv kev pab cuam. Cov kev ntxhov siab no yog tshwm sim los ntawm qhov sib txawv ntawm qhov sib txawv ntawm lub zog hluav taws xob mus rau cov khoom siv hauv av uas cov bushing hla dhau. Nyob rau hauv nruab nrab thiab high voltage daim ntaub ntawv, lub rwb thaiv tsev sab hauv yuav tsum txwv qhov pib ntawm ib nrab tso tawm (PD) uas yuav ua rau degrade lub zog thiab muaj peev xwm ntawm rwb thaiv tsev.

Lub bushings sab nraud rwb thaiv tsev muaj cov qauv tsim tshwj xeeb xws li tus naj npawb ntawm qhov chaw thiab qhov tob tob los muab kev sib cais ntawm qhov sib txuas ntawm HV lub zog thiab lub peev xwm hauv av nyob rau sab nraud. Lub hom phiaj ntawm cov yam ntxwv no yog txhawm rau tiv thaiv kom tsis txhob qhuav arcing (flashover) thiab nkag (xws li). Qhuav Arcing, ntsuas los ntawm BIL, yuav tsum muaj kev ncua deb txaus rau lub tsheb npav los tiv thaiv hluav taws xob los ntawm kev hloov thiab xob laim. Cov xwm txheej no tuaj yeem ua rau tsis ua haujlwm flashover qhov twg cov hluav taws xob arc tsim los ntawm HV tus neeg xyuas pib ncaj qha mus rau hauv av yog tias qhov kev ncua deb tsis txaus rau qhov hluav taws xob. Creep (Leakage) tshwm sim thaum muaj kab mob sib kis nyob rau saum npoo ntawm bushing thiab muab txoj hauv kev coj mus rau tam sim no ua raws li qhov chaw. Kev suav nrog cov sheds hauv bushing tsim tau zoo nce qhov deb ntawm bushing nruab nrab ntawm HV davhlau ya nyob twg thiab hauv av kom tiv thaiv creepage losses.

JIEZOU manufactures sab hauv tsev & sab nraum zoov epoxy bushings rau switchgear, transformer & fais fab apparatus daim ntaub ntawv ntawm ob qho tib si qis thiab nruab nrab voltage chav kawm. Peb Bushings tau tsim thiab sim ua kom tau raws li CSA, IEC, NEMA, thiab IEEE cov qauv.

Tsawg Voltage Bushings raug ntsuas rau qhov hluav taws xob txog li 5kV / 60kV BIL thiab Nruab Nrab Voltage bushings raug ntsuas rau voltages txog 46kV / 250kV BIL.

JIEZOU manufactures Epoxy bushings, uas yog lub zoo meej hloov rau Porcelain Bushings thiab muaj ntau yam zoo. Saib peb tsab xov xwm ntawm Epoxy Bushings vs Porcelain Bushings

Bushing rau transformers

Transformer bushing yog ib qho khoom siv insulating uas tso cai rau lub zog muaj zog, tus neeg nqa khoom tam sim no dhau los ntawm lub tshuab hluav taws xob hauv av. Bar-Type Bushing muaj tus neeg xyuas pib ua hauv, qhov Draw-Lead lossis Draw-Rod Bushing muaj cov kev cai rau tus neeg xyuas pib cais los ntawm nws qhov chaw. Khoom (bulk type) bushings thiab capacitance-graded bushings (condenser type) yog ob lub ntsiab ntawm kev tsim bushing:

Khoom bushings nrog cov plooj (porcelain) lossis epoxy insulator feem ntau yog siv los ua cov ntsiab lus sib txuas los ntawm lub tshuab hluav taws xob tsis tshua muaj hluav taws xob winding sab mus rau sab nraud ntawm lub transformer.
Capacitance-qib bushings yog siv nyob rau hauv siab dua system voltages. Piv rau cov bushings khoom, lawv yog cov complex hauv lawv cov kev tsim kho. Txhawm rau tiv thaiv cov hluav taws xob siab tshaj plaws uas tsim los ntawm cov hluav taws xob ntau dua, cov kab hluav taws xob-qib bushings tau nruab nrog cov ntaub thaiv npog sab hauv capacitance-qib, uas yog embedded ntawm nruab nrab tam sim no nqa tus neeg xyuas pib thiab sab nraud insulator. Lub hom phiaj ntawm cov ntaub thaiv npog tiv thaiv no yog txhawm rau txo qee qhov tso tawm los ntawm kev tswj xyuas hluav taws xob nyob ib puag ncig ntawm tus neeg xyuas pib, kom cov kev ntxhov siab hauv cheeb tsam yog sib npaug sib npaug hauv cov rwb thaiv tsev bushing.

Khoom qhia-1.2kV Yas Moulded Tri-clamp Secondary Bushing