Intshayelelo kuMgaqo woMsebenzi kunye noSetyenziso lwe-MCB

Kwimiba yobunjineli bombane kunye nokhuseleko,ii-miniature circuit breakers (ii-MCB)zidlala indima ebalulekileyo ekukhuseleni iisekethe kumonakalo ogqithisileyo kunye nomonakalo we-short-circuit. Njengenxalenye ebalulekileyo yeenkqubo zombane zokuhlala, zorhwebo, kunye nezoshishino, ii-MCB zenzelwe ukuqhawula iisekethe ngokuzenzekelayo xa zifumanisa impazamo, ngaloo ndlela zithintela iingozi ezinokubakho ezifana nemililo yombane kunye nomonakalo wezixhobo.

Yintoni ii-miniature circuit breaker (MCB)?

I-miniature circuit breaker (MCB) yi-circuit breaker esetyenziselwa ukukhusela ii-circuits kumonakalo we-overcurrent. Ngokungafaniyo nee-fuses zemveli ekufuneka zitshintshwe emva kokuvuthuza, ii-MCB zinokusetwa kwakhona emva kokukhubeka, nto leyo eyenza zibe sisisombululo sokukhusela ii-circuit esilula nesisebenzayo. Ii-MCB ziyafumaneka kwiinkcukacha ezahlukeneyo zangoku, eziqhele ukusuka kwi-0.5A ukuya kwi-125A, kwaye zingasetyenziswa kakhulu kwiindlela ezahlukeneyo zokusebenza.

Yintoni umgaqo osebenzayo we-miniature circuit breaker (MCB)?

Ii-Miniature circuit breakers (ii-MCB) zisebenza ngokusekwe kwiindlela ezimbini:ukukhubeka kubushushukwayeukukhubeka ngemagnethi. Ukugoba kobushushu kusingatha iimeko zokugqithisa. Kusebenzisa umcu we-bimetallic; xa umcu uphezulu kakhulu, umcu we-bimetallic uyagoba kwaye uguquke, ekugqibeleni uphule umcu wesekethe. Ukugoba kwe-magnetic kusingatha iimeko ze-short-circuit. Kusebenzisa i-electromagnet; xa umcu we-current unyuka ngequbuliso, i-electromagnet ivelisa intsimi enamandla ye-magnetic, ngoko nangoko iphule umcu wesekethe.

Le ndlela imbini iqinisekisa ukuba ii-miniature circuit breakers zinokuthintela ngokuthembekileyo ukugcwala kakhulu kunye nee-short circuits, nto leyo ezenza zibe yinxalenye ebalulekileyo yeenkqubo zombane zanamhlanje.

Iintlobo zeeMiniature Circuit Breakers

1. Uhlobo B Miniature Circuit Breaker: Esi siqhekezi sesekethe sifanelekile kwiindawo zokuhlala kwaye senzelwe ukukhubeka ngokuphindwe kathathu ukuya kahlanu kunombane olinganisiweyo. Sifanelekile kwiisekethe ezinemithwalo yokumelana, efana nokukhanyisa kunye neesekethe zokufudumeza.
2. Uhlobo C Miniature Circuit Breaker: Olu hlobo lwe-circuit breaker lusetyenziswa kwizicelo zorhwebo nezemizi-mveliso kwaye lufanelekile kwimithwalo yokungenisa efana neemoto kunye neetransformer. Umjikelo walo wamandla uphindwe ka-5 ukuya kwi-10 kunomlinganiselo wamandla, kwaye lunokumelana nemisinga emfutshane yokunyuka kwamandla ngaphandle kokukhubeka.
3. Uhlobo D Miniature Circuit Breakers: Ii-Type D miniature circuit breakers zenzelwe ukusetyenziswa kakhulu, kunye nomsinga ojikayo ophindwe ka-10 ukuya kuma-20 womsinga olinganisiweyo. Zisetyenziswa rhoqo kwiisekethe ezine-inrush currents ephezulu, njengee-motors ezinkulu.

Yintoni umahluko phakathi kwe-MCB kunye ne-MCCB?
Okokuqala, ii-MCB zisetyenziswa kakhulu ekukhuseleni i-short-circuit kunye ne-overload kwi-currents ephantsi (ngesiqhelo ngaphantsi kwe-100 amps), ngelixa ii-MCCB zisetyenziswa kakhulu ekukhuseleni i-short-circuit kunye ne-overload kwi-currents ephezulu (ngesiqhelo ngaphezulu kwe-100 amps). Oku kungenxa yoyilo olwahlukeneyo lwesakhiwo kunye nezixhobo ezisetyenziswa kwi-MCB kunye nee-MCCB ukulungiselela i-currents kunye nemithwalo eyahlukeneyo. Okwesibini, ii-MCB zihlala zisebenzisa izinto ze-elektroniki ezifana neengcongolo kunye nee-thermal relay ukukhusela, ngelixa ii-MCCB zisebenzisa izixhobo zoomatshini ezifana nezikhuseli ze-thermal-magnetic ukukhusela.

Iingenelo zokusebenzisa ii-miniature circuit breakers

Xa kuthelekiswa neefusi zemveli, ii-miniature circuit breakers (ii-MCB) zineengenelo ezininzi. Okokuqala, ii-MCB zithembekile ngakumbi kwaye zisabela ngokukhawuleza kwiimpazamo zombane. Ukukwazi kwazo ukuphinda zisetyenziswe emva kokukhubeka kunciphisa isidingo sokutshintshwa rhoqo, ngaloo ndlela kunciphisa iindleko zokulungisa. Ngaphezu koko, ii-MCB zincinci kwaye kulula ukuzifaka, nto leyo eyenza zibe lolona khetho lukhethwayo kwiiswitchboards zanamhlanje.

Ngaphezu koko, ii-miniature circuit breakers (ii-MCB) zonyusa ukhuseleko ngokunciphisa umngcipheko wemililo yombane kunye nomonakalo wezixhobo. Uyilo lwazo luzivumela ukuba zisebenze ngaphakathi kwemigangatho ethile yeeparameter, ziqinisekisa ukusebenza kakuhle kweenkqubo zombane kwaye ziphephe iingozi zokuxinana.

Kufuphi

Ngamafutshane, ii-miniature circuit breakers (ii-MCB) zizinto ezibalulekileyo kwiinkqubo zombane, zibonelela ngokhuseleko oluyimfuneko kunye nokhuseleko lwe-short-circuit. Iindidi ezahlukeneyo ze-MCB ziyafumaneka ukuhlangabezana neemfuno ezahlukeneyo zesicelo, zibonelela ngeenzuzo ezifana nokuthembeka okuphezulu, ukulula kokusetyenziswa, kunye nokhuseleko oluphezulu. Ngophuhliso oluqhubekayo lweenkqubo zombane, ukubaluleka kwe-MCBs ekuqinisekiseni ukhuseleko lweendawo zokuhlala nezemizi-mveliso akunakutyeshelwa. Kwabo basebenza kubunjineli bombane okanye ukhuseleko, ukuqonda imisebenzi kunye neenzuzo ze-MCBs kubalulekile, njengoko kunceda ukuqinisekisa ukusebenza kakuhle nangokukhuselekileyo kweenkqubo zombane.