Lub bushing yog ib qho khoom siv insulating uas qhia txog tus neeg xyuas pib nyob rau hauv ib qho khoom siv hluav taws xob lossis los ntawm phab ntsa. Lub qub yog hu ua lub tes tsho hluav taws xob, thiab tom kawg yog hu ua lub tes tsho phab ntsa. Cov qauv casing feem ntau yog tsim los ntawm peb ntu: tus neeg xyuas pib (qib taw qhia), insulator thiab hlau flange. Tus neeg xyuas pib hla lub axis ntawm lub cylindrical insulator, thaum lub nplhaib hlau flange yog mounted sab nraum lub insulator thiab grounded. Lub casing belongs rau ib tug insulating qauv nrog ib tug muaj zog ntsug hluav taws xob teb tivthaiv, thiab hluav taws xob teb lub zog ntawm cov hlau flange yog loj heev, uas yog ib qho yooj yim los tsim corona paug thiab plam flash paug raws ntawm lub dielectric. Lub zog hluav taws xob radial ntawm lub flange thiab cov pas nrig qhia kuj yog qhov siab heev, thiab nws yooj yim los rhuav tshem cov nruab nrab insulating. Ntxiv nrog rau kev siv ib qho khoom siv insulating rau lub casing ntawm 35kV thiab hauv qab no, ntau yam ntaub ntawv insulating los yog niaj hnub ntsuas hluav taws xob feem ntau yog siv los ua cov axial thiab tangential hluav taws xob teb faib yuav zoo ib yam.