Icro Circuit Breaker (MCB mwachidule) ndi imodzi mwazida zodzitetezera zomwe zimagwiritsidwa ntchito kwambiri pazida zamagetsi zamagetsi. Nthawi zambiri amagwiritsidwa ntchito ngati gawo limodzi ndi gawo laling'ono la magawo atatu, chitetezo chochulukira komanso kupitilira mphamvu yamagetsi pansi pa 125A, ndipo nthawi zambiri imapezeka m'mitengo imodzi, yapawiri, yamitengo itatu ndi inayi. Ntchito yaikulu ya kakang'ono dera wosweka (MCB) ndi kusinthana dera, mwachitsanzo pamene panopa kudzera kakang'ono dera wosweka (MCB) kuposa mtengo anaika ndi izo, izo basi kuswa dera pambuyo pa nthawi yochedwa. Ngati pakufunika, imathanso kuyatsa ndikuyimitsa makinawo pamanja ngati chosinthira wamba.
Kapangidwe ka Miniature Circuit Breaker (MCB) ndi Mfundo Yogwirira Ntchito
Ma Miniature Circuit Breakers (MCB) amapangidwa ndi zinthu zoteteza thermoplastic zomwe zimapangidwira m'nyumba yomwe imakhala ndi makina abwino, otentha komanso oteteza. Makina osinthira amakhala ndi zolumikizira zosasunthika komanso zosunthika zomwe zimalumikizana ndi mawaya omwe amalumikizidwa palimodzi ndikuyika ma terminals. Kulumikizana ndi magawo omwe amanyamula pakali pano amapangidwa ndi electrolytic copper kapena alloys siliva, kusankha komwe kumadalira kuchuluka kwa voliyumu komwe kumayendera.
Zolumikizana zikasiyana mochulukira kapena nthawi yayifupi, arc imapangidwa. Modern miniature circuit breaker (MCB) amagwiritsidwa ntchito kusokoneza kapena kuthetsa mapangidwe a arc, kuyamwa kwa mphamvu ya arc ndi kuziziritsa ndi chipinda chozimitsa chachitsulo mu arc spacer kuti azindikire, ma arc spacers okhala ndi insulated bracket yokhazikika pamalo oyenera. Kuphatikiza apo, kugwiritsa ntchito mphamvu yamagetsi ya kondakitala (zowononga ma circuit tsopano zochepetsera mphamvu kuti zithandizire kusweka kwa chinthucho) kapena kuwomba kwa maginito, kotero kuti arc idasunthika ndikutalikirana, kudzera munjira ya arc kupita kuchipinda chosokoneza. .
Miniature circuit breaker (MCB) makina ogwiritsira ntchito amakhala ndi solenoid magnetic release device ndi bimetal thermal release device. Chipangizo chochotsa maginito kwenikweni ndi maginito ozungulira. Pamene mphamvu yamagetsi imadutsa pamzere, mphamvu yamagetsi yopangidwa ndi solenoid imakhala yochepa kusiyana ndi kugwedezeka kwa kasupe kuti ipange mphamvu, zida sizingayamwidwe ndi solenoid, ndipo wodutsa dera amagwira ntchito bwino. Pakakhala vuto laling'ono pamzere, pompopompo imapitilira kangapo kuposa momwe yakhalira, mphamvu yamagetsi yopangidwa ndi maginito amagetsi imakhala yayikulu kuposa mphamvu yamasika, zida zimayamwa ndi maginito amagetsi kudzera pakupatsirana. njira yolimbikitsira njira yomasulira yaulere kumasula olumikizana nawo akulu. Kulumikizana kwakukulu kumasiyanitsidwa pansi pakuchitapo kanthu kwa kasupe wosweka kuti adutse dera kuti agwire ntchito yachitetezo chachifupi.
Chigawo chachikulu mu chipangizo chotulutsa matenthedwe ndi bimetal, yomwe nthawi zambiri imapanikizidwa kuchokera kuzitsulo ziwiri zosiyana kapena zitsulo zazitsulo. Chitsulo kapena zitsulo aloyi ali ndi khalidwe, ndiko kuti, osiyana zitsulo kapena zitsulo aloyi pa nkhani ya kutentha, kukula kwa voliyumu kusintha si zogwirizana, kotero pamene mkangano, kwa zinthu ziwiri zosiyana zitsulo kapena aloyi zikuchokera bimetallic. pepala, lidzakhala ku gawo lokulitsa la mbali yotsika yopindika, kugwiritsa ntchito kupindika kulimbikitsa kutulutsidwa kwa kayendedwe ka ndodo, kukhazikitsa kumasulidwa. kuchitapo kanthu, kuti muzindikire chitetezo chokwanira. Popeza chitetezo chochulukirachulukira chimazindikirika ndi mphamvu yamafuta, imadziwikanso kuti kutulutsa kwamafuta.
Kusankhidwa kwa 1, 2, 3 ndi 4 mitengo yaing'ono yophwanyira dera
Zophwanyira zazing'ono zazing'ono zomwe zimagwiritsidwa ntchito posinthira ndi kuteteza gawo limodzi lokha la dera. Ma circuit breakers amapangidwa makamaka kuti aziyendera ma voltage otsika. Zowononga maderawa zimathandizira kuwongolera mawaya enaake, makina owunikira kapena malo ogulitsira m'nyumba. Izi zitha kugwiritsidwanso ntchito ngati zotsukira vacuum, malo ounikira wamba, kuyatsa panja, mafani ndi zowulutsira etc.
Zophwanyira maulendo ang'onoang'ono awiri nthawi zambiri zimagwiritsidwa ntchito pamagulu owongolera ogula monga masiwichi akulu. Kuyambira pa mita ya mphamvu, mphamvu imamwazikana podutsa dera kupita kumadera osiyanasiyana a nyumbayo. Magawo awiri ang'onoang'ono ophwanyika amagwiritsidwa ntchito kuti ateteze ndikusintha mawaya agawo komanso osalowerera ndale.
Zophwanyira zazing'ono zazing'ono zitatu zimagwiritsidwa ntchito popereka kusintha ndi chitetezo pamagawo atatu okha a dera, osati osalowerera ndale.
Chowotcha chaching'ono chokhala ndi mapiko anayi, kuphatikiza pakusintha ndi kuteteza magawo atatu a dera, chimakhala ndi chowombera choteteza makamaka pamtengo wosalowerera ndale (mwachitsanzo, N pole). Chifukwa chake, chowotcha chaching'ono chaching'ono cha zinayi chiyenera kugwiritsidwa ntchito nthawi iliyonse yomwe mafunde osalowerera ndale atha kupezeka mudera lonselo.
Kachidutswa kakang'ono kakang'ono A (Z), B, C, D, K kusankha kopindika
(1) A (Z) mtundu wa circuit breaker: 2-3 nthawi zovotera pano, zomwe sizimagwiritsidwa ntchito kawirikawiri, zomwe zimagwiritsidwa ntchito poteteza semiconductor (ma fuse amagwiritsidwa ntchito nthawi zambiri)
(2) B-mtundu wowononga dera: 3-5 nthawi zovoteledwa pakalipano, zomwe zimagwiritsidwa ntchito ponyamula katundu wokhazikika komanso mabwalo owunikira otsika magetsi, omwe amagwiritsidwa ntchito m'mabokosi ogawa am'nyumba kuteteza zida zam'nyumba ndi chitetezo chamunthu, zomwe sizikugwiritsidwa ntchito pano. .
(3) C-mtundu wosweka dera: 5-10 nthawi oveteredwa panopa, ayenera kumasulidwa mkati masekondi 0.1, makhalidwe wa wosweka dera amagwiritsidwa ntchito kwambiri, amagwiritsidwa ntchito poteteza mizere yogawa ndi mabwalo kuyatsa ndi kutembenuka mkulu. -pakali pano.
(4) D-mtundu wosweka dera: 10-20 nthawi zovoteledwa pano, makamaka m'malo okhala ndi zida zamagetsi zomwe zimagwiritsidwa ntchito nthawi yomweyo, zomwe sizimagwiritsidwa ntchito kwambiri m'banja, pakunyamula katundu wambiri komanso makina akuluakulu olowera, omwe amagwiritsidwa ntchito kwambiri chitetezo cha zida ndi mkulu inrush panopa.
(5) K-mtundu wosweka dera: 8-12 nthawi zovoteledwa pano, ziyenera kukhala mu masekondi 0.1. K-mtundu wa miniature circuit breaker ntchito yayikulu ndikuteteza ndi kuwongolera thiransifoma, mabwalo othandizira ndi ma mota ndi mabwalo ena kuchokera kufupi ndi kudzaza. Oyenera inductive ndi magalimoto katundu ndi mkulu inrush mafunde.
Nthawi yotumiza: Apr-09-2024