Halin halin yanzu naLEDyana ƙaruwa saboda dalilai daban-daban da ake amfani da su.A wannan lokacin, ana buƙatar ɗaukar matakan kariya don tabbatar da cewa LED ɗin ba zai lalace ba saboda ƙãra wutar lantarki ya wuce wani lokaci da girma.Amfani da na'urorin kariyar da'ira shine ma'aunin kariya na asali da tattalin arziki.Abubuwan kariya da aka fi amfani da su donLED fitilaKariyar kewaye shine varistor.

Ana amfani da Varistor don kare fitilun LED.Ana iya cewa ko da wane nau'in wutar lantarki, sauya wutar lantarki da wutar lantarki da aka yi amfani da su don fitilun LED, ana buƙatar irin wannan kariya.Ana amfani da shi don kare ƙarfin wutar lantarki wanda sau da yawa ke faruwa akan hanyar sadarwar wutar lantarki na birni.Abin da ake kira surge voltage galibi ɗan gajeren lokaci ne mai ƙarfin wutar lantarki da ke haifar da bugun walƙiya ko farawa da dakatar da kayan lantarki masu ƙarfi.Watsawa ta walƙiya shine babban dalili.Ana iya raba yajin walƙiya zuwa yajin walƙiya kai tsaye da yajin walƙiya kai tsaye.Yajin walƙiya kai tsaye yana nufin cewa walƙiya ta afkawa hanyar sadarwar wutar lantarki kai tsaye, wanda ba kasafai ba ne, kuma galibin manyan na'urorin grid na wutar lantarki suna da matakan kariya na walƙiya da kansu.Harin walƙiya kai tsaye yana nufin haɓakar da ake yaɗawa akan grid ɗin wutar da walƙiya ta jawo.Wannan tashin hankali yana iya faruwa sosai, saboda tsawa 1800 da walƙiya 600 na faruwa a duk faɗin duniya kowane lokaci.Kowane yajin walƙiya zai haifar da ƙarar wutar lantarki akan grid ɗin wutar da ke kusa.Faɗin bugun bugun jini yawanci ƴan dabara ne ko ma ya fi guntu, kuma girman bugun bugun jini na iya kaiwa sama da dubun volts.Musamman saboda girman girmansa, yana da tasiri mafi girma akan lalacewar kayan aikin lantarki.Ba tare da kariya ba, duk nau'ikan kayan lantarki suna da sauƙin lalacewa.Abin farin ciki, kariyar karuwa abu ne mai sauqi qwarai.Kawai ƙara varistor anti surge, wanda yawanci ana haɗa shi a layi daya kafin mai gyara.

Ka'idar wannan varistor ita ce kamar haka: akwai resistor mara nauyi wanda juriyarsa tana kusa da buɗaɗɗen kewayawa a cikin keɓaɓɓen kewayon ƙofa, kuma da zarar ƙarfin lantarkin da aka yi amfani da shi ya wuce bakin kofa, juriyarsa yana kusa da sifili nan da nan.Wannan ya sa ya zama mai sauƙi don ɗaukar hawan.Bugu da ƙari, varistor na'urar da za a iya dawo da ita.Bayan shayarwa, zai iya taka rawar kariya.