Nthawi yaLEDkuchuluka chifukwa cha zifukwa zosiyanasiyana ntchito. Pakadali pano, njira zodzitchinjiriza ziyenera kuchitidwa kuti zitsimikizire kuti kuwala kwa LED sikuwonongeka chifukwa kuchuluka kwaposachedwa kumapitilira nthawi ndi matalikidwe. Kugwiritsa ntchito zida zoteteza dera ndiye njira yodzitetezera kwambiri komanso yotsika mtengo. Chomwe chimagwiritsidwa ntchito kwambiri potetezaNyali ya LEDchitetezo cha dera ndi varistor.

Varistor amagwiritsidwa ntchito kuteteza nyali za LED. Zinganenedwe kuti ngakhale magetsi amtundu wanji amagwiritsidwa ntchito pa nyali za LED, kutetezedwa kotereku kumafunika. Amagwiritsidwa ntchito kuteteza mphamvu yamagetsi yomwe imapezeka nthawi zambiri pamaneti amagetsi amagetsi. Chomwe chimatchedwa surge voltage makamaka chimakhala chanthawi yochepa kwambiri chamagetsi obwera chifukwa cha mphezi kapena kuyambika ndi kuyimitsidwa kwa zida zamagetsi zamphamvu kwambiri. Chifukwa chachikulu ndi mphezi. Kugunda kwa mphezi kungathe kugawidwa m'magulu ang'onoang'ono a mphezi ndi kugunda kwa mphezi. Kuwomba kwamphezi molunjika kumatanthauza kuti mphezi imagunda pa netiweki yamagetsi molunjika, zomwe ndizosowa, ndipo makina ambiri opangira magetsi amakhala ndi njira zodzitetezera okha. Mphezi yosalunjika imatanthawuza mafunde omwe amaperekedwa pa gridi yamagetsi chifukwa cha mphezi. Kuwomba kumeneku kungathe kuchitika, chifukwa mabingu 1800 ndi mphezi 600 zimachitika padziko lonse lapansi mphindi iliyonse. Kugunda kulikonse kumapangitsa kuti magetsi azikwera pa gridi yamagetsi yapafupi. M'lifupi mwake kugunda kwamphamvu nthawi zambiri kumakhala kocheperako pang'ono kapena kocheperako, ndipo matalikidwe a kugunda amatha kukhala okwera ma volts masauzande angapo. Makamaka chifukwa cha matalikidwe ake apamwamba, zimakhudza kwambiri kuwonongeka kwa zipangizo zamagetsi. Popanda chitetezo, mitundu yonse ya zida zamagetsi ndizosavuta kuwonongeka. Mwamwayi, chitetezo cha opaleshoni ndichosavuta. Ingowonjezerani anti surge varistor, yomwe nthawi zambiri imalumikizidwa mofananira isanachitike.

Mfundo ya varistor iyi ili motere: pali chotsutsa chopanda malire chomwe kukana kwake kuli pafupi ndi dera lotseguka mkati mwa malire omwe atchulidwa, ndipo kamodzi kokha mphamvu yogwiritsidwa ntchito ikadutsa pakhomo, kukana kwake kuli pafupi ndi zero nthawi yomweyo. Izi zimapangitsa kukhala kosavuta kuyamwa maopaleshoni. Komanso, varistor ndi chipangizo chobwezeretsedwa. Pambuyo pa kuyamwa kwa maopaleshoni, kumatha kugwira ntchito yoteteza.