Monga bizinesi yoyimira kwambiri ku Wenzhou, YUANKY ali ndi mbiri yakale yachitukuko komanso unyolo wathunthu wamafakitale. Zogulitsa zathu zimakhalanso zopikisana kwambiri pamsika.mongaMCB.

MCB (Miniature Circuit Breaker, chodulira chaching'ono) ndi chimodzi mwazinthu zomwe zimagwiritsidwa ntchito kwambiri poteteza ma terminal pamakina otsika amagetsi. Ndi ubwino monga kukula kwazing'ono, ntchito yabwino ndi chitetezo cholondola, imagwiritsidwa ntchito kwambiri m'magawo ogawa nyumba za mafakitale, zamalonda ndi zachitukuko, kuchita ntchito zazikulu monga kudzaza dera ndi chitetezo chafupipafupi. Zotsatirazi ndikuwunika kwatsatanetsatane kwa magwiridwe antchito ake kuchokera kuzinthu zingapo monga ntchito zazikulu, mawonekedwe aukadaulo, ndi mawonekedwe akugwiritsa ntchito.

I. Ntchito Yoteteza Kwambiri: Onetsetsani kuti dera likuyenda bwino

Chofunikira chachikulu cha MCB chagona pakutetezedwa kwa mizere yogawa ndi zida zamagetsi. Ntchito yake yodzitchinjiriza imatheka makamaka kudzera munjira zolondola, makamaka kuphatikiza mitundu iwiri yotsatirayi yachitetezo chachikulu:

1. Ntchito yoteteza katundu wambiri

Pamene dera likugwira ntchito bwino, mphamvuyi imakhala mkati mwa chiwerengero chovotera. Komabe, pakakhala zida zambiri zamagetsi kapena dera likulemedwa kwa nthawi yayitali, zomwe zili mumzerewu zimapitilira mtengo wake, zomwe zimapangitsa kuti mawaya azitentha. Ngati zolemetsa kwa nthawi yayitali, zimatha kuyambitsa kukalamba kwa insulation, mabwalo amfupi komanso moto. The overload chitetezo cha MCB zimatheka kudzera bimetallic Mzere matenthedwe ulendo chipangizo: pamene panopa kuposa mtengo oveteredwa, ndi bimetallic Mzere mapindikira ndi kupunduka chifukwa cha kutentha kwaiye panopa, kuyendetsa limagwirira ulendo kuchitapo kanthu, kuchititsa kulankhula wosweka dera kutsegula ndi kudula dera.

Kutetezedwa kwake kochulukira kumakhala ndi mawonekedwe anthawi yosiyana, ndiko kuti, kuchuluka kwazomwe zikuchitika, kumachepetsa nthawi yochitapo kanthu. Mwachitsanzo, pamene panopa ndi 1.3 nthawi yomwe idavotera panopa, nthawi yogwiritsira ntchito imatha maola angapo. Ikafika kuwirikiza kasanu ndi kasanu ndi momwe idavotera, nthawi yochitapo imatha kufupikitsidwa mpaka mkati mwa masekondi angapo. Izi sizimangopewera kuyenda kosafunikira komwe kumachitika chifukwa chakuchulukira pang'ono kwakanthawi komanso kumadula mwachangu dera ngati kuli kolemetsa kwambiri, kupeza chitetezo chosinthika komanso chodalirika.

2. Ntchito yachitetezo chafupipafupi

Kuzungulira kwakanthawi ndi chimodzi mwazinthu zowopsa kwambiri pamabwalo, nthawi zambiri zomwe zimachitika chifukwa cha kuwonongeka kwa mawaya kapena zolakwika zamkati za zida. Panthawiyi, mafunde amakono akukwera nthawi yomweyo (mwina kufika makumi kapena mazana nthawi zomwe adavotera panopa), ndipo mphamvu yaikulu yamagetsi ndi kutentha komwe kumapangidwa kumatha kuwotcha mawaya ndi zida nthawi yomweyo, komanso kuyambitsa moto kapena ngozi zamagetsi. Kutetezedwa kwafupipafupi kwa MCB kumatheka kudzera pa chipangizo chamagetsi chamagetsi: pamene njira yachidule imadutsa pa coil ya chipangizo chamagetsi chamagetsi, mphamvu yamagetsi yamagetsi imapangidwa, kukopa zida kuti ziwononge njira yaulendo, zomwe zimapangitsa kuti oyanjanawo atsegule mwamsanga ndikudula dera.

Nthawi yochitapo kanthu yachitetezo chozungulira ndi yayifupi kwambiri, nthawi zambiri mkati mwa masekondi 0.1. Ikhoza kudzipatula mwamsanga vutolo lisanakule, kuchepetsa kuwonongeka kwa zolakwika zafupipafupi pamzere ndi zipangizo, ndikuteteza chitetezo chaumwini ndi katundu.

Ii. Zaukadaulo: Zolondola, zokhazikika komanso zodalirika

1. Kulondola kwambiri pakuyenda

Miyezo yachitetezo cha MCB idapangidwa mosamalitsa ndikuwunikidwa kuti zitsimikizire kuti zikugwira ntchito moyenera mkati mwazomwe zatchulidwazi. Mtengo wapano wa chitetezo chochulukirachulukira (monga kusagwira ntchito pa 1.05 nthawi yomwe idavoteledwa komanso kugwira ntchito mkati mwa nthawi yomwe adagwirizana pa 1.3 nthawi yomwe idavoteledwa) komanso kutsika kochepa kwachitetezo chafupipafupi (nthawi zambiri 5 mpaka 10 nthawi yomwe idavoteledwa pano) zonse zimagwirizana ndi miyezo yapadziko lonse lapansi (monga IEC 60898) ndi 3 GB 106 miyezo ya dziko (monga 3 GB 106). Panthawi yopanga, MCB iliyonse iyenera kuyang'anitsitsa kuti iwonetsetse kuti nthawi yolakwika pazochitika zosiyana ndi zomwe zikuchitika panopa ikuyendetsedwa mkati mwazovomerezeka, kupeŵa "kulephera kugwira ntchito" (osapunthwa panthawi yolakwika) kapena "ntchito zabodza" (kupunthwa panthawi ya ntchito yabwino).

2. Moyo wautali wamakina ndi magetsi

MCB imayenera kupirira nthawi ndi nthawi kutseka ndi kutsegula ntchito komanso zovuta zomwe zikuchitika panopa, motero zimakhala ndi zofunikira pa moyo wamakina ndi magetsi. Moyo wamakina umatanthawuza kuchuluka kwa nthawi yomwe woyendetsa dera amagwira ntchito mopanda pano. Moyo wamakina wa MCB wapamwamba kwambiri utha kufikira nthawi zopitilira 10,000. Mphamvu yamagetsi imatanthawuza kuchuluka kwa nthawi yomwe imagwira ntchito popakidwa pakali pano, nthawi zambiri zosachepera 2,000 nthawi. Zigawo zake zazikulu zamkati (monga kukhudzana, njira zodutsa, ndi akasupe) zimapangidwa ndi zipangizo zamphamvu kwambiri (monga siliva alloy contacts ndi phosphor bronze conductive parts), ndipo kupyolera mu ndondomeko yolondola ndi njira zochizira kutentha, kukana kwawo kuvala, kukana kwa dzimbiri, ndi kukana kutopa kumalimbikitsidwa kuti zitsimikizire kugwira ntchito mokhazikika ngakhale pambuyo pogwiritsira ntchito nthawi yaitali.

3. Mphamvu yosweka imasinthidwa malinga ndi zomwe zikuchitika

Kuthyola mphamvu kumatanthawuza kuchuluka kwanthawi yayitali komwe MCB ingathyole motetezeka pansi pamikhalidwe yodziwika bwino, ndipo ndiye chizindikiro chachikulu choyezera kuthekera kwake kwachitetezo chanthawi yayitali. Kutengera ndi momwe mungagwiritsire ntchito, kutha kwa MCB kumatha kugawidwa m'magulu angapo, monga:

M'zochitika za anthu wamba, MCBS yokhala ndi mphamvu zophwanya 6kA kapena 10kA imagwiritsidwa ntchito nthawi zambiri, yomwe imatha kuthana ndi vuto lachidule m'nyumba kapena malo ang'onoang'ono ogulitsa.

M'mafakitale, MCBS yokhala ndi mphamvu zosweka kwambiri (monga 15kA ndi 25kA) imayenera kuzolowera malo okhala ndi zida zowuma komanso mafunde akulu afupipafupi.

Kuzindikirika kwa mphamvu yakusweka kumadalira njira yozimitsira arc (monga chipinda chozimira cha grid arc). Pakusweka kwafupipafupi, arc imalowetsedwa mwachangu m'chipinda chozimitsa cha arc, ndipo arc imagawidwa kukhala ma arcs angapo achidule kudzera muzitsulo zazitsulo, kuchepetsa mphamvu ya arc ndikuzimitsa mwachangu arc kuti zisawonongeke mkati mwa wophwanya dera chifukwa cha kutentha kwakukulu kwa arc.

Iii. Makhalidwe Apangidwe ndi Ogwira Ntchito: Miniaturization ndi kuphweka

Yang'ono kukula komanso yosavuta kukhazikitsa

MCB utenga kamangidwe yodziyimira payokha, ndi yaying'ono kukula (nthawi zambiri ndi zigawo muyezo monga 18mm kapena 36mm m'lifupi), ndipo akhoza anaika mwachindunji pa njanji mabokosi muyezo kugawa kapena makabati kugawa, kupulumutsa unsembe danga. Mapangidwe ake ophatikizika amathandizira chitetezo chodziyimira pawokha cha mabwalo angapo mkati mwa malo ochepa ogawa mphamvu. Mwachitsanzo, m'bokosi logawa m'nyumba, ma MCBS angapo angagwiritsidwe ntchito kuwongolera mabwalo osiyanasiyana monga kuyatsa, soketi, ndi zowongolera mpweya motsatana, kupeza chitetezo ndi kasamalidwe kosiyana, komwe ndi koyenera kuzindikira zolakwika ndikuwongolera kugwiritsa ntchito mphamvu.

2. Yosavuta kugwiritsa ntchito komanso yosavuta kusamalira

Makina ogwiritsira ntchito a MCB adapangidwa mwaumunthu. Kutseka (" ON "position) ndi kutsegula (" OFF ") ntchito zimatheka kudzera pa chogwirira. Maonekedwe a chogwiriracho amawonekera bwino, kulola kulingalira mwachidziwitso kwa dera lomwe likutuluka. Pambuyo pa TRIP yolakwika, chogwiriracho chimakhala chapakati (" TRIP "malo), kuthandizira ogwiritsa ntchito kuzindikira mwachangu dera lolakwika. Mukakhazikitsanso, ingosunthani chogwiriracho ku malo a "OFF" ndikukankhira ku "ON". Palibe zida zaukadaulo zomwe zimafunikira ndipo ntchitoyi ndi yosavuta. Pakukonza kwatsiku ndi tsiku, MCB sifunikira kuwongolera zovuta kapena kuyendera. Zimangofunika kufufuzidwa nthawi zonse kuti zitsimikizire kuti maonekedwe ake sali bwino komanso kuti ntchitoyo ndi yosalala, zomwe zimapangitsa kuti pakhale ndalama zochepa zokonzekera.

3. Kuchita bwino kwambiri kwa kutchinjiriza

Kuonetsetsa chitetezo magetsi, casing ndi mkati insulating zigawo zikuluzikulu za MCB anapangidwa ndi mkulu-voteji ndi mkulu-kutentha zosagwira insulating zipangizo (monga mapulasitiki thermosetting ndi lawi retardant ABS), ndi kutchinjiriza kukana ≥100MΩ, wokhoza kupirira 2500V AC voteji AC 1 voteji kugwa kapena kupirira flashoverno miniti test. Itha kukhalabe ndi ntchito yabwino yotchinjiriza m'malo ovuta monga chinyontho ndi fumbi, kupewa kutayikira kapena mabwalo amfupi a gawo ndi gawo, ndikuwonetsetsa chitetezo cha ogwiritsa ntchito ndi zida.

Iv. Ntchito Zokulitsidwa ndi Kusintha: Kukwaniritsa Zofuna Zosiyanasiyana

1. Sinthani mitundu yotengedwa

Kuphatikiza pa kuchulukirachulukira komanso chitetezo chachifupi, MCB imathanso kukwaniritsa zosowa zamitundu yosiyanasiyana kudzera pakukulitsa magwiridwe antchito. Mitundu yodziwika bwino yochokera ku:

- MCB yokhala ndi chitetezo chotayikira (RCBO) : Imaphatikiza gawo lozindikira kutayikira pamaziko a MCB yokhazikika. Kutayikira kukachitika pozungulira (yotsalirayo ikupitilira 30mA), imatha kuyenda mwachangu kuti ipewe ngozi zamagetsi ndipo imagwiritsidwa ntchito kwambiri m'mabwalo am'nyumba.

- MCB yokhala ndi chitetezo chowonjezera / chocheperako: Imayenda yokha mphamvu ya gridi yakwera kwambiri kapena yotsika kwambiri kuti iteteze zida zodziwikiratu monga mafiriji ndi zoziziritsa kukhosi kuti zisawonongeke chifukwa cha kusinthasintha kwamagetsi.

- MCB yomwe idavotera panopo: Sinthani mtengo wapano wovoteledwa kudzera pa knob, yoyenera pazochitika zomwe katundu wapano akufunika kusinthidwa mosavuta.

2. Kusinthasintha kwamphamvu kwa chilengedwe

MCB ikhoza kugwira ntchito mokhazikika pansi pazikhalidwe zosiyanasiyana zachilengedwe, zomwe zimagwiritsidwa ntchito mkati mwa kutentha kwa -5 ℃ mpaka 40 ℃ (zitsanzo zapadera zimatha kuonjezedwa mpaka -25 ℃ mpaka 70 ℃), ndi chinyezi chachibale cha ≤95% (palibe condensation), ndipo imatha kutengera nyengo yamadera osiyanasiyana. Pakadali pano, mawonekedwe ake amkati amatha kukana kugwedezeka ndi kugwedezeka, ndipo amatha kugwira ntchito modalirika m'malo ogulitsa mafakitale kapena magalimoto oyendera (monga zombo ndi magalimoto osangalatsa) ndikugwedezeka pang'ono.

Kusiyana kwa ma circuit breakers ena:

MCB (Miniature Circuit Breaker): Amagwiritsidwa ntchito makamaka poteteza dera lomwe lili ndi mphamvu zochepa (nthawi zambiri zosakwana 100 amperes).

MCCB (Molded Case Circuit Breaker): Imagwiritsidwa ntchito poteteza dera lomwe lili ndi mafunde apamwamba (nthawi zambiri kuposa ma amperes 100) ndipo ndiloyenera zida zazikulu ndi machitidwe ogawa magetsi.

RCBO (Leakage Circuit Breaker): Imaphatikiza chitetezo chopitilira muyeso ndi ntchito zoteteza kutayikira, ndipo nthawi imodzi imatha kuteteza dera kuti lisalemedwe, kuzungulira pang'ono ndi kutayikira.