I-Case Molded Circuit Breaker

II-Molded Case Circuit Breaker (MCCB)lilitye lembombo lokhuseleko lwale mihla lombane, liqinisekisa ukuba iisekethe zombane zikhuselwa ngokuzenzekelayo kwiimeko ezinobungozi ezifana nokugcwala, iisekethe ezimfutshane, kunye neziphene zomhlaba. Ifakwe kwiplastiki ebunjiweyo ehlala ixesha elide, ii-MCCBs ziyilelwe ukuba zisebenze ngokuthembekileyo nakwiimeko ezinomngeni apho ukugquma kunye nokukhuselwa eluthulini, ukufuma, kunye nezinye iingozi zibalulekile. Uyilo lwazo oludityanisiweyo, ludityaniswa nomthamo omkhulu wokuphazamiseka, luzenza zisebenziseke ngeendlela ezininzi kwaye zibaluleke kakhulu kuluhlu lwezicelo, ukusuka koomatshini boshishino ukuya kunikezelo lwamandla orhwebo, kunye neenkqubo zombane zokuhlala.

Eli nqaku liphonononga iimpawu eziphambili, iindlela, kunye nokusetyenziswa kweIi-MCCBs, ukugqamisa indima yabo ebalulekileyo ekukhuseleni kombane kunye nokuthembeka.

Yintoni iCase Molded Circuit Breaker?

II-Molded Case Circuit Breaker (MCCB)luhlobo lwesixhobo sokukhusela umbane esiphazamisa ukuhamba kwangoku ngexesha leemeko zokusebenza ezingaqhelekanga. Ifakwe kwiqokobhe leplastiki ebunjiweyo elikhuselayo, ii-MCCBs zakhiwe ngokuqinileyo ukuze zikhusele izinto zangaphakathi kwizinto ezisingqongileyo ezinjengothuli kunye nokufuma ngelixa zikwabonelela ngokugqunywa kombane.

Ii-MCCBs ziyilelwe uku:

• Ukuphazamisa umsinga wombanekwimeko yomthwalo omninzi, isiphaluka esifutshane, okanye impazamo yomhlaba.
• Ukusebenza ngesandlaukwahlula iisekethe ngeenjongo zokugcina okanye zokhuseleko.
• Bamba imisinga emikhulu, ezenza zilungele iinkqubo zoshishino kunye nezorhwebo.

Yaboamandla okuphazamisa aphezuluibavumela ukuba baphazamise ngokukhuselekileyo imisinga ephezulu yeempazamo, ukunciphisa umngcipheko womonakalo kwizixhobo zombane kunye nokuthintela imililo. Ii-MCCBs ziza ngobukhulu obuhlukeneyo kunye nokulinganisa, ukubonelela ukuguquguquka ukuze kusetyenziswe kuluhlu olubanzi lweenkqubo zombane.

INkqubo yokuSebenza yee-MCCBs

Ii-MCCBs zisebenzisa iindlela ezimbini eziphambili zokubona kunye nokusabela kwiimeko ezingaqhelekanga zangoku:ukhuseleko thermalkwayeukhuseleko lwemagnethi. Ezi ndlela ziqinisekisa ukuba i-MCCB inokuphendula ngokufanelekileyo kwiintlobo ezahlukeneyo zeephene, nokuba zenzeke ngokuthe ngcembe (umthwalo ogqithisiweyo) okanye ngokukhawuleza (isiphaluka esifutshane).

1. Thermal Trip Mechanism

Ithermal elementkwi-MCCB ngumcu we-bimetallic ophendula kubushushu obuveliswa ngamandla akhoyo kwixesha elizinzileyo. Njengoko i-current flowing through breaker inyuka ngaphaya kwexabiso elilinganisiweyo, i-strip iyatshisa kwaye igobe. Nje ukuba umcu ugobe ukuya kwindawo ethile, uxhokonxa indlela yohambo, uqhawule unikezelo lombane.

Le mpendulo yobushushu yenzelwe ngokukodwa ukukhuselaiimeko zokugcwala, apho umsinga udlula ixabiso elilinganisiweyo kodwa ungenzi monakalo ngoko nangoko. Indlela yohambo lwe-thermal ivumela ukusabela okulibazisekayo, iqinisekisa ukuba ukunyuka okwethutyana kwimo yangoku (efana nexesha lokuqalisa kweemoto) akubangeli ukuphazamiseka okungeyomfuneko. Ukuba umthwalo ogqithisileyo uyaqhubeka, nangona kunjalo, i-MCCB iya kukhubeka kwaye ithintele ukufudumeza kweengcingo okanye izixhobo eziqhagamshelweyo.

2. iMagnetic Trip Mechanism

Iinto magneticye-MCCB ibonelela ngokhuseleko olukhawulezileyo kwiisekethe ezimfutshane. Ngexesha lesekethe emfutshane, ukushukuma okukhulu kwangoku kuqukuqela kwi-breaker. Olu tyando luvelisa imagnethi eyomeleleyo ngokwaneleyo ukuba ihambe isaphuli ngokukhawuleza, iphazamise umsinga phambi kokuba ibangele umonakalo omkhulu.

Indlela yohambo lwemagnethi ibalulekile ekukhuseleni ngokuchaseneiisekethe ezimfutshane, eyenzeka xa kukho indlela ethe ngqo engalindelekanga yombane, idlula umthwalo. Iisekethe ezimfutshane ziyingozi kuba zinokubangela umonakalo omkhulu kwizixhobo kwaye zibonise iingozi zomlilo. Ukusabela ngokukhawuleza kwendlela yohambo lwemagnethi ye-MCCB kuthintela umsinga ekufikeleleni kumanqanaba anobungozi, ngokufanelekileyo ikhusela inkqubo yombane.

3. Imimiselo yohambo oluhlengahlengiswayo

Ii-MCCB ezininzi zixhotyiswe ngeizicwangciso zohambo ezilungisekayo, ukuvumela abasebenzisi ukuba benze ngokwezifiso ukusebenza kwe-breaker ukuhlangabezana neemfuno ezithile zenkqubo yabo. Olu lungelelaniso lubonelela ngokuguquguquka okukhulu ngokubhekiselele kwimiqobo yohambo lwe-thermal kunye nemagnethi.

Umzekelo, kwizicelo apho kusetyenziswa iinjini, isiqalo sangoku sinokuba phezulu kakhulu kunesiqhelo esisebenzayo ngoku. Ngokuhlengahlengisa izicwangciso zohambo lwe-thermal, abaqhubi banokunqanda ukukhubeka ngokungeyomfuneko ngelixa beqinisekisa ukuba inkqubo ikhuselwe ngexesha lokulayisha ixesha elide. Ngokufanayo, ukulungelelanisa iisethingi zohambo lwamagnetic kuvumela i-breaker ukuba iphendule ngokufanelekileyo kwiisekethe ezimfutshane zobunzima obahlukeneyo.

4. UkuSebenza ngokuManuwali kunye nokuSebenzayo

Ii-MCCB zenzelwe zombiniincwadi yesandlakwayeukusebenza oluzenzekelayo. Kwiimeko eziqhelekileyo, i-breaker inokuqhutyelwa ngesandlavula okanye ucime iisekethe, okwenza kube lula ukwenza ukugcinwa okanye ukuvavanya ngokukhuselekileyo iinkqubo zombane.

Xa kukho impazamo yombane, i-MCCB iya kuhamba ngokuzenzekelayo, inqumle amandla ukukhusela inkqubo. Oku kudityaniswa kwemisebenzi yezandla kunye nokusebenza okuzenzekelayo kwandisa ukuguquguquka kokusebenza, okuvumela ukugcinwa okucwangcisiweyo kunye nokukhusela iimpazamo ezingacwangciswanga.

5. Uluhlu olubanzi lweeReyithingi zangoku

Ii-MCCBs ziyafumaneka kwi-auluhlu olubanzi lweereyithingi zangoku, ukusuka ngaphantsi njenge-10 amperes (A) ukuya phezulu njenge-2,500 A okanye ngaphezulu. Olu luhlu lubenza bafanelekele izicelo kuwo wonke amashishini kunye neendawo ezahlukeneyo, ukusuka kwizakhiwo zokuhlala ukuya kwizakhiwo ezinkulu zemizi-mveliso.

Ukukwazi ukukhetha i-MCCB kunye nokulinganisa okufanelekileyo kwangoku kuqinisekisa ukuba i-breaker inikeza ukhuseleko oluthembekileyo ngaphandle kokukhubeka ngokungeyomfuneko ngexesha lokusebenza okuqhelekileyo. Ngaphaya koko, ii-MCCBs zinokureyithwa kumbane ohlukeneyo, kubandakanywa amandla ombane aphantsi (LV) kunye neenkqubo zombane ophakathi (MV), okwandisa ngakumbi ukuguquguquka kwazo.

Ukusetyenziswa kwee-MCCBs

Ngenxa yokuguquguquka kunye nokusebenza okuphezulu, ii-MCCBs zisetyenziswa kuluhlu olubanzi lweamashishini kunye nokusingqongileyo. Ezona zicelo zixhaphakileyo ziquka:

1. IiNkqubo zoShishino

Kwiisetingi zemizi-mveliso, ii-MCCBs zibalulekile ekukhuseleni oomatshini abanzima, ii-transformers, kunye neenkqubo ezinkulu zombane kwiimpazamo ezinokukhokelela kumonakalo wesixhobo, ixesha lokuphumla, okanye imililo. Ii-MCCBs ezinomlinganiselo ophezulu wangoku kunye namandla aphezulu okuphazamisa zibaluleke kakhulu kumashishini afana nemveliso, imigodi, i-oyile kunye negesi, kunye nokuveliswa kwamandla, apho iinkqubo zombane zifumana imithwalo ephezulu kunye nemisinga enokuthi ibe khona.

2. Izakhiwo zorhwebo

Kwizakhiwo zorhwebo ezifana nodederhu lweevenkile, izakhiwo zeeofisi, nezibhedlele, ii-MCCBs zidlala indima ebalulekileyo ekuqinisekiseni ukusasazwa okukhuselekileyo nokuthembekileyo kwamandla ombane. Ezi zaphuli zikhusela iinkqubo ze-HVAC, izibane, izinyusi, kunye nezinye iinkqubo zokwakha ezibalulekileyo ukusuka kumthwalo ogqithisileyo kunye neesekethe ezimfutshane, ezinceda ukugcina ukusebenza okuqhubekayo kunye nokunciphisa umngcipheko kubahlali.

3. Ukusetyenziswa kwendawo yokuhlala

Nangona iinkqubo zokuhlala zombane zihlala zisebenzisa izixhobo zokhuseleko ezincinci ezifana nezaphuli zesekethe ezincinci (MCBs), ii-MCCBs ngamanye amaxesha zisetyenziswa kwizicelo ezinkulu zokuhlala okanye apho kufuneka ukhuseleko lwempazamo ephezulu, njengakwizakhiwo zokuhlala okanye kumakhaya anomthwalo omkhulu wombane (umzekelo, umbane. izikhululo zokutshaja iimoto). Ii-MCCBs zibonelela ngengqinisekiso eyongeziweyo yokhuseleko kwiziphene zombane eziqatha kwezi meko.

4. IiNkqubo zaMandla aVuselelwayo

Njengoko iinkqubo zamandla ahlaziyekayo ezifana nofakelo lwamandla elanga nawomoya luxhaphake kakhulu, ii-MCCBs ziya zisetyenziswa kakhulu ukukhusela ii-inverters, iziguquli, kunye nothungelwano lokuhambisa phakathi kwezi nkqubo. Ukukwazi ukuhlengahlengisa izicwangciso zohambo kuvumela ii-MCCBs ukuba zivumelane nemithwalo eyahlukeneyo yombane kunye neemeko eziqhelekileyo zemithombo yamandla avuselelekayo.

5. Usetyenziso kunye neZiseko zoPhuhliso

Ii-MCCBs zikwasetyenziswa kwiinkqubo zombane ezisetyenziswayo, kubandakanywa uthungelwano lokuhambisa amandla, izitishi, kunye neziseko ezibalulekileyo ezifana neenkqubo zothutho kunye namaziko edatha. Apha, baqinisekisa ukusebenza okuqhubekayo kweenkonzo ezibalulekileyo ngokukhusela kwiimpazamo zombane ezinokukhokelela ekuphumeni okubanzi okanye umonakalo.

Izinto eziluncedo kwi-Molded Case Circuit Breakers

Ii-MCCBs zibonelela ngeengenelo ezininzi ezibenza zibe lukhetho olukhethiweyo lokhuseleko lombane kwizicelo ezahlukeneyo:

1. Ukuguquguquka

Ii-MCCBs ziguquguquka kakhulu ngenxa yoluhlu lwazo olubanzi lwangoku kunye ne-voltage ratings, iisetingi zohambo oluhlengahlengiswayo, kunye nokukwazi ukuphatha zombini imisinga ephantsi kunye nephezulu. Oku kuguquguquka kubenza bafanelekele ukusetyenziswa kwiindawo ezahlukeneyo, ukusuka kwizakhiwo zokuhlala ukuya kwizityalo ezinkulu zemizi-mveliso.

2. Ukuthembeka okuphezulu

Ulwakhiwo olomeleleyo kunye neendlela zohambo ezithembekileyo ze-MCCBs ziqinisekisa ukuba zibonelela ngokhuseleko olungaguqukiyo ekuhambeni kwexesha. Ukuphazamiseka kwabo okuphezulu kuthetha ukuba nakwimeko yeziphoso ezinzima, ii-MCCBs ziya kuqhawula ngokukhuselekileyo isekethe ngaphandle kokusilela.

3. Ukhuseleko

Ngokuthintela ukugcwala, iisekethe ezimfutshane, kunye neziphene zomhlaba, ii-MCCBs zidlala indima ebalulekileyo ekukhuseleni izixhobo zombane kunye nabasebenzi kwiimeko ezinobungozi. Ityala elibunjiweyo libonelela ngokugquma kunye nokukhuselwa kwendalo, ngelixa indlela yohambo oluzenzekelayo iqinisekisa ukuba iziphene zilungiswa ngokukhawuleza.

4. ULondolozo olulula

Ii-MCCBs zinokuqhutywa ngokulula ngesandla ngeenjongo zokulondolozwa, ukuvumela iisekethe ukuba zibe zodwa ngokukhuselekileyo ngaphandle kokufuna ukuvalwa ngokupheleleyo kwenkqubo. Oku kwenza kube lula ukwenza uhlolo, ukulungiswa, okanye ukuphuculwa ngaphandle kokuphazamisa ezinye iindawo zombane wombane.

5. Uyilo olugcina isithuba

Uyilo oludibeneyo lwe-MCCBs luvumela ukuba lusetyenziswe kwiindawo eziqinileyo, ezifana neepaneli zombane kunye neebhodi zokutshintsha, ngaphandle kokuncama ukusebenza. Ukukwazi kwabo ukuphatha imisinga emikhulu kwifom encinci ibaluleke kakhulu kwizicelo apho indawo iyancipha.

Ukuqukumbela

I I-Case Molded Circuit Breaker(MCCB)yinxalenye ebalulekileyo kwiinkqubo zokuhambisa umbane, ukunika isisombululo esiguquguqukayo, esithembekileyo, kunye nesisebenzayo sokukhusela iisekethe ekugqithiseni, kwiisekethe ezimfutshane, kunye neziphene zomhlaba. Ngecasing yayo eyomeleleyo etyhidiweyo, amandla aphezulu okuphazamiseka, kunye nezicwangciso zohambo oluhlengahlengiswayo, i-MCCB ifanelekile kuluhlu olubanzi lwezicelo kuwo wonke amacandelo oshishino, ezorhwebo, eendawo zokuhlala, kunye nokuhlaziywa kwamandla.

Ingaba isetyenziselwa ukukhusela izixhobo ezinzima zoshishino, ukugcina imisebenzi ekhuselekileyo kwizakhiwo zorhwebo, okanye ukuqinisekisa ukuhamba okuqhubekayo kwamandla ahlaziyekayo, ii-MCCBs zibonelela ngokhuseleko kunye nokuthembeka okuyimfuneko kwiinkqubo zombane zanamhlanje. Indibaniselwano yabo yeendlela zohambo lwe-thermal kunye nemagnethi ziqinisekisa ukuba iziphene zibonwa ngokukhawuleza kwaye ziqwalaselwe, ukunciphisa umngcipheko kwizixhobo kunye nabasebenzi ngokufanayo.

Isishwankathelo, i-MCCB ayikhuseli nje ukufakela kombane kodwa ikwaqinisekisa ukusebenza ngokuqhubekayo nokukhuselekileyo kothungelwano lokuhambisa amandla, nto leyo eyenza ibe sisixhobo esibalulekileyo kwihlabathi lanamhlanje lobunjineli bombane.