icro Circuit Breaker (MCB a takaice) yana ɗaya daga cikin na'urorin kariya ta ƙare da aka fi amfani da su a cikin na'urorin rarraba wutar lantarki ta tashar. Yawancin lokaci ana amfani da shi don gajeriyar kewayawa-ɗayan lokaci-ɗaya da matakai uku, nauyi mai yawa da kariya mai ƙarfi a ƙasa da 125A, kuma ana samun gabaɗaya a cikin igiya guda ɗaya, sandar igiya biyu, igiya uku da zaɓi huɗu. Babban aikin miniature circuit breaker (MCB) shi ne canja wurin kewayawa, watau lokacin da na yanzu ta hanyar miniature circuit breaker (MCB) ya zarce kimar da aka gindaya masa, zai karya da'ira kai tsaye bayan wani lokaci na jinkiri. Idan an buƙata, zai iya kunna da kashewa da hannu kamar maɓalli na yau da kullun.
Tsari da Ƙa'idar Aiki (MCB).
Miniature Circuit Breakers (MCB) an yi su ne da kayan hana ruwa na thermoplastic wanda aka ƙera a cikin gidaje wanda ke da kyawawan kaddarorin inji, thermal da insulating. Tsarin sauyawa ya ƙunshi kafaffen lambobi masu tsayi da motsi masu motsi tare da lambobi da wayoyi masu fitarwa waɗanda aka haɗa tare da loda tashoshi. Lambobin sadarwa da sassa masu ɗauka na yanzu an yi su ne da jan ƙarfe na lantarki ko na azurfa, zaɓin wanda ya dogara da ƙimar ƙarfin lantarki na yanzu na mai watsewar kewaye.
Lokacin da lambobin sadarwa suka rabu ƙarƙashin nauyin nauyi ko gajeriyar yanayin kewayawa, ana yin baka. Ana amfani da ɗan ƙaramin kewayawa na zamani (MCB) don katsewa ko kawar da ƙirar baka, shayar da makamashin baka da sanyaya ta ɗakin da ke kashe baka a cikin sararin baka na ƙarfe don gane, waɗannan maƙallan baka tare da insulated bracket gyarawa a daidai matsayi. Bugu da ƙari, yin amfani da wutar lantarki mai da'irar da'ira (masu fashewar kewayawa yanzu sun fi ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun samfur don haɓaka ƙarfin karyewar samfur) ko busa maganadisu, ta yadda baka da sauri ya motsa da elongated, ta hanyar tashar kwararar baka a cikin ɗakin katsewa.
Ingantacciyar hanyar daftarin aiki (MCB) ta ƙunshi na'urar sakin maganadisu solenoid da na'urar sakin zafi bimetal. Na'urar tsiri maganadisu a haƙiƙanin kewayawar maganadisu ce. Lokacin da aka wuce na yau da kullun na yau da kullun a cikin layi, ƙarfin lantarki da ke haifar da solenoid bai kai matsayin tashin hankali na bazara don samar da ƙarfin amsawa ba, solenoid ɗin ba zai iya tsotse armature ba, kuma mai watsewar kewayawa yana aiki akai-akai. Lokacin da akwai kuskuren ɗan gajeren lokaci a cikin layi, halin yanzu ya wuce sau da yawa na halin yanzu na yau da kullum, ƙarfin lantarki da aka samar da electromagnet ya fi ƙarfin amsawar bazara, armature yana tsotse ta hanyar lantarki ta hanyar watsawa don inganta tsarin sakin kyauta don saki manyan lambobin sadarwa. An raba babban lambar sadarwa a ƙarƙashin aikin ɓataccen bazara don yanke da'ira don taka rawar kariya ta gajeren lokaci.
Babban abin da ke cikin na'urar sakin thermal shine bimetal, wanda gabaɗaya ana matse shi daga ƙarfe daban-daban guda biyu ko gami da ƙarfe. Karfe ko karfe gami yana da siffa, wato, daban-daban karfe ko karfe gami a cikin yanayin zafi, da fadada da girma canji ba m, don haka a lokacin da shi ne mai tsanani, domin biyu daban-daban kayan karfe ko gami abun da ke ciki na bimetallic takardar, shi zai zama zuwa fadada coefficient na gefen ƙananan gefen lankwasawa, da yin amfani da curvature don inganta saki na aiki da juyi juyi aiki a matsayin mai jujjuya aikin. Tunda ana samun kariyar wuce gona da iri ta hanyar tasirin thermal, ana kuma san shi da sakin thermal.
Zaɓin 1, 2, 3 da 4 na ƙaramar sandar kewayawa
Ana amfani da ƙananan na'urorin da'ira guda ɗaya don samar da sauyawa da kariya don lokaci ɗaya kawai na da'ira. Waɗannan na'urorin da aka kera an tsara su ne don ƙananan ma'aunin wutar lantarki. Waɗannan na'urorin da'ira suna taimakawa wajen sarrafa takamaiman wayoyi, tsarin haske ko kantuna a cikin gida. Hakanan za'a iya amfani da waɗannan don masu tsabtace injin, wuraren samar da hasken wuta gabaɗaya, hasken waje, magoya baya da masu hurawa da sauransu.
Ana amfani da ƙaramin juzu'in ƙaramar sandar igiya sau biyu a cikin rukunan sarrafa mabukaci kamar manyan maɓalli. An fara daga mitar makamashi, wutar lantarki tana tarwatse a ko'ina cikin na'urar kewayawa zuwa sassa daban-daban na gidan. Ana amfani da ƙananan igiyoyi biyu don samar da kariya da sauyawa don lokaci da wayoyi masu tsaka tsaki.
Ana amfani da ƙananan na'urorin da'ira mai ƙarfi guda uku don samar da sauyawa da kariya don matakai uku kawai na da'ira, ba tsaka tsaki ba.
Ƙanƙara mai jujjuyawar igiya huɗu, baya ga samar da sauyawa da kariya ga matakai uku na da'ira, yana da ɗan wasan kariya da farko don sandar tsaka tsaki (misali, N sandar). Don haka, dole ne a yi amfani da ƙaramin igiya mai ƙarfi huɗu a duk lokacin da matsananciyar tsaka tsaki ta iya kasancewa a cikin kewayen.
Karamin mai jujjuyawa A (Z), B, C, D, K nau'in lankwasa zaɓi
(1) A (Z) nau'in mai watsewar kewayawa: 2-3 sau rated halin yanzu, da wuya a yi amfani da shi, gabaɗaya ana amfani da shi don kariyar semiconductor (fiusi yawanci ana amfani da su)
(2) Nau'in kewayawa na B: 3-5 sau rated halin yanzu, gabaɗaya ana amfani da shi don ɗaukar nauyi mai tsafta da ƙananan wutar lantarki, galibi ana amfani da su a cikin akwatin rarraba gidaje don kare kayan gida da amincin mutum, ƙarancin amfani a halin yanzu.
(3) Nau'in nau'in nau'in C: 5-10 sau da aka ƙididdigewa, yana buƙatar a sake shi a cikin 0.1 seconds, mafi yawan amfani da halayen na'urar, yawanci ana amfani da shi wajen kare layin rarrabawa da kuma hasken wuta tare da babban kunnawa na yanzu.
(4) D-type circuit breaker: 10-20 sau da rated halin yanzu, yafi a cikin yanayi na high instantaneous halin yanzu na lantarki kayan, kullum kasa amfani a cikin iyali, domin high inductive lodi da kuma manyan inrush halin yanzu tsarin, fiye amfani a cikin kariya na kayan aiki tare da high inrush halin yanzu.
(5) Nau'in K-nau'in da'ira: 8-12 sau rated halin yanzu, yana buƙatar zama cikin 0.1 seconds. Babban aikin na'ura mai juzu'i na k-type shine karewa da sarrafa na'ura mai canzawa, da'irori na taimako da injina da sauran da'irori daga gajeriyar kewayawa da wuce gona da iri. Dace da inductive da mota lodi tare da babban inrush igiyoyin.
Lokacin aikawa: Afrilu-09-2024