September 13, 2021, Unikani mfundo yogwira ntchito yazowononga mabokosi
Zowononga ma circuit nthawi zambiri zimakhala ndi makina olumikizirana, makina ozimitsa a arc, makina ogwiritsira ntchito, gawo laulendo, chipolopolo ndi zina zotero.
Kuzungulira kwakanthawi kochepa, mphamvu ya maginito yomwe imapangidwa ndi mphamvu yayikulu (nthawi zambiri 10 mpaka 12) imapambana mphamvu yamasika, gawo laulendo limakoka makina ogwiritsira ntchito, ndipo chosinthira chimayenda nthawi yomweyo.Pamene zolemetsa, zamakono zimakhala zazikulu, kutentha kwa kutentha kumawonjezeka, ndipo bimetal deforms mpaka kufika pamlingo winawake kukankhira makina kuti asunthe (akuluakulu amakono, afupikitsa nthawi yochitapo kanthu).
Pali mtundu wamagetsi womwe umagwiritsa ntchito transformer kusonkhanitsa zomwe zikuchitika pagawo lililonse ndikuziyerekeza ndi mtengo wokhazikitsidwa.Pamene panopa si zachilendo, ndi microprocessor kutumiza chizindikiro kuti pakompyuta ulendo unit kuyendetsa limagwirira ntchito.
Ntchito ya woyendetsa dera ndikudula ndi kulumikiza dera lonyamula katundu, komanso kudula dera lolakwika, kuteteza kufalikira kwa ngozi ndikuonetsetsa kuti chitetezo chikugwira ntchito.Chowotcha chamagetsi champhamvu kwambiri chimafunika kuswa 1500V, 1500-2000A arc yapano, ma arcs awa amatha kutambasulidwa mpaka 2m ndikupitilirabe kuyaka popanda kuzimitsidwa.Chifukwa chake, kuzimitsa kwa arc ndi vuto lomwe liyenera kuthetsedwa ndi ophwanya ma circuit-voltage apamwamba.
Mfundo ya kuwomba kwa arc ndi kuzimitsa kwa arc makamaka kuziziritsa arc kufooketsa kusungunuka kwa kutentha.Kumbali inayi, arc imatambasulidwa ndi arc kuti ilimbikitse kubwezeretsanso ndi kufalikira kwa tinthu tating'onoting'ono, ndipo panthawi imodzimodziyo, tinthu tating'onoting'ono tambirimbiri timawuluka kuti tibwezeretse mphamvu ya dielectric ya sing'anga.
Otsika-voltage circuit breakers amatchedwanso automatic air switches, omwe angagwiritsidwe ntchito kulumikiza ndi kuswa mabwalo olemetsa, komanso angagwiritsidwe ntchito kuwongolera ma mota omwe amayamba pafupipafupi.Ntchito yake ndi yofanana ndi kuchuluka kwa zina kapena ntchito zonse za masiwichi a mpeni, ma relay opitilira muyeso, ma voliyumu otaya mphamvu, ma relay otenthetsera ndi zoteteza kutayikira.Ndichida chofunikira chodzitchinjiriza chamagetsi pamagetsi otsika amagetsi.
Otsika ma voltage breakers amakhala ndi ntchito zosiyanasiyana zoteteza (zochulukira, zozungulira zazifupi, chitetezo chamagetsi, etc.), mtengo wosinthika, mphamvu yosweka kwambiri, ntchito yabwino, chitetezo, ndi zina zambiri, kotero amagwiritsidwa ntchito kwambiri.Kapangidwe ndi mfundo yogwirira ntchito The low-voltage circuit breaker imapangidwa ndi makina ogwiritsira ntchito, zolumikizira, zida zodzitetezera (zotulutsa zosiyanasiyana), makina ozimitsa a arc, ndi zina zambiri.
Kulumikizana kwakukulu kwa otsika-voltage circuit breaker kumayendetsedwa pamanja kapena kutsekedwa ndi magetsi.Kulumikizana kwakukulu kutatha, njira yaulere yaulendo imatseka kukhudzana kwakukulu pamalo otseka.Coil ya kumasulidwa kwa overcurrent ndi thermal element ya thermal release imagwirizanitsidwa mndandanda ndi dera lalikulu, ndipo coil ya kumasulidwa kwa undervoltage imagwirizanitsidwa mofanana ndi magetsi.Dera likakhala lalifupi kapena litalemedwa kwambiri, chida cha kutulutsidwa kwanthawi yayitali chimakoka, zomwe zimapangitsa kuti njira yolumikizira yaulere igwire ntchito, ndipo cholumikizira chachikulu chimadula gawo lalikulu.Dera likadzadzaza, chotenthetsera cha gawo laulendo wotenthetsera chimapinda bimetal ndikukankhira njira yaulere kuti isunthe.Pamene dera lili pansi-voltage, armature ya under-voltage release imatulutsidwa.Njira yaulere yaulendo imatsegulidwanso.Kutulutsidwa kwa shunt kumagwiritsidwa ntchito poyang'anira kutali.Pa ntchito yachibadwa, koyilo yake imadulidwa.Mukafunika kuwongolera mtunda, dinani batani loyambira kuti mupatse mphamvu koyilo.
Nthawi yotumiza: Sep-13-2021
