Post insulator yog ib qho tshwj xeeb rwb thaiv tsev tswj, uas tuaj yeem ua lub luag haujlwm tseem ceeb hauv cov khoom siv hluav taws xob. Nyob rau hauv thaum ntxov xyoo, post insulators feem ntau yog siv rau hluav taws xob ncej, thiab maj mam tsim nyob rau hauv lub high-voltage hluav taws xob hlau txuas ntauwd. Muaj ntau qhov raug tshem tawm insulators tau dai ntawm ib kawg kom nce lub sijhawm creepage. Lawv feem ntau yog ua los ntawm silica gel los yog ceramics, uas yog hu ua insulators. Lub insulator yuav tsis muaj qhov cuam tshuam ntawm flashover vim qhov kev hloov pauv ntawm cov kev pabcuam ntawm cov nyiaj siv ua haujlwm thiab hauv av. Txwv tsis pub, lub insulator yuav tsis muaj qhov cuam tshuam ntawm flashover vim qhov kev hloov ntawm cov kev pab cuam ntawm cov nyiaj siv ua haujlwm.
Muaj ntau lub disc-shaped insulators yog dai ntawm ib kawg ntawm high-voltage hlau txuas ntauwd kom nce lub sij hawm creepage. Lawv feem ntau yog ua los ntawm iav, ceramic los yog roj hmab, uas yog hu ua insulators. Txhawm rau kom tsis txhob ntab cov plua plav thiab lwm cov pa phem adhering rau ntawm qhov chaw insulator thiab tsim txoj hauv kev, nws yog flashed thiab tawg los ntawm ob qho kawg ntawm cov insulator, piv txwv li creepage Yog li ntawd, ua rau cov txheej txheej sab nrauv, piv txwv li creepage nrug, thiab tawm lub caij nyoog raws. cov txheej txheej ntawm rwb thaiv tsev, piv txwv li, lub sijhawm xau, yog hu ua creepage nrug Creepage nrug=qhov chaw sab nrauv / siab dua qhov system voltage Raws li qib ntawm kev ua qias tuaj, qhov nce qhov deb feem ntau yog 31 mm / kV hauv cov cheeb tsam hnyav heev. Zero tus nqi insulator yog hais txog lub insulator uas nws muaj peev xwm faib ntawm ob qhov kawg ntawm insulator nyob ze lossis sib npaug rau xoom thaum lub sijhawm ua haujlwm. Kev cuam tshuam ntawm tus nqi xoom lossis qis tus nqi insulator: lub rwb thaiv tsev ntawm cov kab hluav taws xob nyob ntawm cov insulator vim yog kev tsim khoom lossis cov teebmeem sab nraud, xws li qias neeg insulator nto, xob laim stroke, thiab lwm yam. Cov rwb thaiv tsev ntawm cov insulator yuav deteriorate tsis tu ncua. Thaum cov rwb thaiv tsev tsis kam txo qis lossis xoom, nws yog hu ua tus nqi qis lossis xoom tus nqi insulator. Lub insulator yog lubricated, uas tuaj yeem txo qhov capacitive reactance nyhuv ntawm cov xov hlau thiab txo qhov poob ntawm tam sim no.
