Toughened iav insulator muaj cov khoom siv kho tshuab thiab hluav taws xob zoo dua. Nws lub zog tensile, hluav taws xob tawg tsis kam, kev co qaug zog tsis kam, arc hlawv tsis kam thiab txias thiab kub poob siab tsis kam yog zoo dua li porcelain insulator. Ceramic insulator muaj qhov zoo ntawm kev ua haujlwm zoo rwb thaiv tsev, kev hloov pauv huab cua, tiv thaiv tshav kub thiab hloov tau yooj yim. Nws yog dav siv nyob rau hauv kab ntawm ntau theem voltage. Disc porcelain insulators yog hom tawg
Kev pabcuam lub neej ntawm insulator iav insulator muaj cov yam ntxwv ntawm xoom tus nqi nws tus kheej tawg. Thawj qhov laj thawj rau kev tawg ntawm tus kheej yog cov impurities thiab nodules hauv cov iav thaum lub sijhawm tsim khoom. Yog hais tias cov impurities thiab nodules raug faib nyob rau hauv lub puab nro txheej, ib co ntawm lawv yuav nws tus kheej explode nyob rau hauv ib lub sij hawm ntawm lub sij hawm tom qab cov khoom tsim. Yog li ntawd, lub tsev tsim khoom yuav tsum khaws cov khoom rau ib lub sij hawm tom qab kev tsim khoom, thiaj li nrhiav tau qhov zoo txaus ntshai ntawm kev tsim khoom. Yog hais tias impurities los yog nodules raug faib nyob rau hauv lub txheej compression txheej, tom qab khiav ntawm lub kis kab mob rau ib lub sij hawm, nyob rau hauv qhov kev txiav txim ntawm lub zog txias thiab kub kub txawv thiab electromechanical load, nws yuav ua rau nws tus kheej tawg ntawm iav rwb thaiv tsev. Tsis tas li ntawd, ib feem tawm yuav tshwm sim nyob rau hauv qhov kev txiav txim ntawm lub hwj chim zaus voltage tom qab cov av txheej ntawm lub iav insulator yog damped thaum lub sij hawm ua hauj lwm. Cov cua sov mus ntev los ntawm kev tso tawm ib nrab yuav ua rau poob ntawm cov iav rwb thaiv tsev thiab xoom tus nqi ntawm tus kheej tawg. Yog li ntawd, tus kheej tawg tus nqi ntawm cov iav insulators ua haujlwm nyob rau hauv qhov chaw muaj kuab paug hnyav yuav nce. Txawm li cas los xij, tus kheej tawg tus nqi ntawm iav insulator yog txawv ntawm qhov deterioration tus nqi ntawm cov plooj (porcelain insulator) thiab cov laus tus nqi ntawm cov organic composite insulator. Tus kheej tawg tus nqi ntawm iav insulator belongs rau thaum ntxov raug. Nrog rau qhov txuas ntxiv ntawm lub sijhawm ua haujlwm, tus nqi tawg ntawm tus kheej qhia tau hais tias kev poob qis ib xyoos ib zaug, thaum lub sij hawm deterioration ntawm porcelain insulator belongs rau lig raug. Nrog rau ncua sij hawm, qhov deterioration tus nqi yuav maj mam nce nyob rau hauv lub ua ke txhua yam thiab hluav taws xob load. Vim muaj cov yam ntxwv ntawm cov khoom siv organic, qhov kev laus thiab qhov deterioration tus nqi ntawm cov khoom siv insulators yuav nce ntxiv nrog rau lub sijhawm. Nyob rau hauv txawv teb chaws, nws yog feem ntau txiav txim siab hais tias lub neej ntawm cov iav insulators thiab porcelain insulators yog hais txog 50 xyoo, thaum lub neej kev laus ntawm composite insulators yog tsis ntau tshaj 25 xyoo.