Këyit bi nekk ci biir fiil bi, ñu koy faral di woowe këyit buy isoler wala këyit buy isole, amna fonction yu mag yii:
1. Fonction inculation: Li gëna am solo ci këyit biy isole mooy isolation. Mën na tere courant bi dem fu sori ci kilifa yi ci cable bi, suko defee kaaraange ak wóor gi am ci joxe kuuraŋ. Këyitu insulation dafay faral di am performance yu bari te mën nañu ci dékku voltage bu yéeg.
2. High{)- resistance te baña màgget: këyit buy boole mën na nekk ci diggante yenn tàngoor, di tere màgget gi am ci tàngoor wi, ba noppi mën toppatoo bu yàgg- ci fiil yi.
3. Yeetal absorption ak fees: Ci yenn xeeti fiil yu melni diw-impregnated këyit fiil yu isolé, këyit isolation itam amna fonction absorption diw, mëna xëcci ak mën toppatoo yenn isolation
Diw sëqët du yenn isolation rek, waaye dafay seddal fiil bi.
4. Jàppale ci wàllu mekaniik: Këyitu insulation dafay jàppale ci wàllu mekanik ngir aar conducteur fiil yi ci yàqu-yàqu physique bi ci biti.
