Cov cuab yeej siv uas lub iav insulator yog siv los txhawb thiab insulate lub hlau hu ua insulator. Lub tshuab insulator yog ua los ntawm iav thiab yog hu ua iav insulator; qhov feem ntau dav siv hauv Circuit Court tam sim no yog lub khob iav tempered. Cov iav insulator yog suav nrog cov iav seem, hlau kaus mom thiab hlau taw.
Vim tias lub zog ntawm cov tshuab muaj zog ntawm txheej txheej ntawm cov iav thaiv tsev, qhov saum npoo tsis tawg rau cov kab nrib pleb. Lub zog hluav taws xob ntawm iav feem ntau tsis hloov pauv thaum lub sijhawm ua haujlwm tag nrho, thiab nws cov txheej txheem kev laus dhau los qeeb qeeb tshaj li ntawm cov plooj (porcelain). Yog li ntawd, cov iav insulators tsuas yog raug rho tawm vim yog qhov kev puas tsuaj rau tus kheej thiab tshwm sim nyob rau hauv thawj xyoo ntawm kev ua haujlwm, tab sis qhov tsis xws ntawm cov plooj (plooj plav) insulators tsuas yog ob peb xyoos tom qab pib pom.
Siv cov iav insulators, cov hluav taws xob hluav taws xob tiv thaiv lub caij nyoog tiv thaiv kev ntsuas los ntawm cov insulators thaum lub sijhawm ua haujlwm yuav raug tshem tawm. Qhov no yog vim tias txhua qhov kev puas tsuaj rau lub iav tempered yuav ua rau muaj kev puas tsuaj rau lub rwb thaiv tsev, thiab nws yog qhov yooj yim rau cov neeg ua haujlwm nrhiav tau thaum mus ncig ntawm txoj kab. Thaum lub tshuab hluav taws xob puas, lub iav tawg nyob ze ntawm lub taub hau hlau thiab hlau ceg raug ntes, thiab lub zog ntawm lub zog ntawm qhov seem ntawm cov rwb thaiv tsev txaus kom tiv thaiv cov insulator los ntawm kev tawg. Kev ntsuas tus kheej ntawm cov iav insulators yog ib qho ntawm cov ntsuas tseem ceeb los ntsuas qhov zoo ntawm cov khoom lag luam, thiab nws tseem yog qhov zoo ntawm qhov kev soj ntsuam tam sim no ntawm kev twv thiab kev twv rau cov haujlwm xa khoom.