Lub insulator yog ib qho tshwj xeeb rwb thaiv tsev tswj, uas muaj peev xwm ua si ob lub luag hauj lwm ntawm kev txhawb nqa conductors thiab tiv thaiv tam sim no grounding nyob rau hauv lub overhead kis kab. Insulators yog siv nyob rau hauv kev sib txuas ntawm tus ncej ntauwd thiab tus neeg xyuas pib, thiab lub substation ncej thiab kab. Insulators muab faib ua peb hom: hom porcelain lub raj mis, hom iav, thiab hom sib xyaw raws li cov khoom siv dielectric. Cov kev ua txhaum ntawm cov insulators feem ntau raug soj ntsuam, feem ntau yog los tiv thaiv qhov tsis ua haujlwm ntawm lub rwb thaiv tsev vim muaj ntau yam kev ntxhov siab electromechanical los ntawm kev hloov hauv ib puag ncig thiab cov khoom siv hluav taws xob, yog li ua rau kev puas tsuaj rau cov kev pabcuam thiab kev ua haujlwm ntawm lub zog hluav taws xob.
Feem ntau faults ntawm insulators
(1) Qhov zoo ntawm cov khoom tsis zoo. Vim tias qhov nqus dej noo nyob rau lub caij los nag, qhov kev ua haujlwm ntawm lub rwb thaiv tsev ntawm lub insulator yog tsawg, thiab cov insulator flashover breakdown los yog thermal expansion tawg tshwm sim, ua rau tawg thiab qhov kawg ntawm cov rwb thaiv tsev ntawm lub insulator.
(2) Kev tsim kho tsis raug ua rau lub rwb thaiv tsev puas. Vim yog sab nraud quab yuam, lub rwb thaiv tsev yog tawg, puas los yog tsis muaj glaze, uas ua rau flashover thiab tawg tsis ua hauj lwm nyob rau hauv rainy huab cua.
(3) Insulator laus. Vim lub sij hawm ntev electromechanical load thiab kev hloov nyob rau hauv ib puag ncig sab nraud, qhov kev ua tau zoo ntawm lub rwb thaiv tsev ntawm lub insulator txo qis thiab nws thiaj li poob qhov kev ua haujlwm ntawm rwb thaiv tsev.
(4) Flashover hlawv. Txo kev ua haujlwm ntawm rwb thaiv tsev thiab tsim kev puas tsuaj tom qab ua haujlwm ntev.
(5) xob laim tshaj qhov voltage. Flashover thiab hlawv lub insulator.
(6) Kev kis kab mob flashover. Qhov paug paug ntawm lub insulator nce mus txog ib theem thiab ua rau lub phenomenon ntawm insulator flashover los yog nto paug.