High-voltage kab ntes rau 6 ~ 220kV AC kis tau tus mob kab, yog ib hom tshiab ntawm xob laim ntes tau raug tshem tawm thiab ntsia rau ntawm lub tshuab xa hluav taws xob.
Transmission kab ntes: feem ntau yog insulated zinc oxide ntes.
Distribution kab ntes: valve hom ntes, tub hom ntes, zinc oxide ntes, tus lwm yam.
Txwv high-voltage kab xob laim overvoltage.
Txhim kho qib ntawm high-voltage kab xob laim kuj.
Txo qhov tripping tus nqi tshwm sim los ntawm xob laim txhaum hauv qhov system.
Ib tug high-voltage kab ntes muaj ob daim ntawv.
Ib qho yog feem ntau ntsia nyob rau hauv parallel nrog cov kab insulator hlua, tus ntes tuaj yeem txuas nrog hauv series los tsim qhov sib txawv. Thiab ua kom lub zog tawg yog qis dua qhov insulator hlua flashover voltage.
Yog li ntawd lub high-voltage kab ntes nyob rau hauv cov hlua insulator ua ntej lub flashover puas, nws installation yog raws li nram no.
Lwm tus yog tus gapless ntes ncaj qha mus rau hauv lub system, kev siv cov ntes tsis kam tiv thaiv cov yam ntxwv no los tiv thaiv cov hlua insulator. Ob leeg tuaj yeem txhim kho qib ntawm xob laim ntawm cov kab sib kis, thiab yog li txo tus nqi ntawm xob laim tripping, nce kev ntseeg tau ntawm kev sib kis kab ua haujlwm.
High-voltage kab ntes thiab high-voltage kab insulators nyob rau hauv parallel. Thaum xob laim ntaus ntes ntes, qhov seem voltage ntawm tus ntes yog qis dua 50% ntawm lub insulator hlua tawm voltage. Txawm hais tias xob laim tam sim no nce, qhov seem voltage ntawm tus ntes tsuas yog nce me ntsis, lub insulator tseem tsis tshwm sim flashover. Tom qab xob laim ntws, cov zaus txuas ntxiv tam sim no ntws los ntawm tus ntes tsuas yog milliampere, cov zaus txuas ntxiv tam sim no ntws los ntawm tus neeg ntes tua thaum thawj zaug dhau xoom, yuav tsis mus, lub kaw lus rov zoo li qub.
Cov duab hauv qab no qhia txog lub high-voltage kab ntes thiab high-voltage kab insulator volt- vib nas this yam ntxwv ntawm kev sib raug zoo ntawm kev koom tes. Cov yam ntxwv volt-thib ob ntawm tus neeg ntes dua li cov khoom siv hluav taws xob volt-thib ob ntawm ntau tshaj 15% qis, thaum lub backlash, tuaj yeem qis dua 20%.
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