Ijika eliKhubekayo le-MCB

Iziphuli zesekethe ezincinci (I-MCB) zidlala indima ebalulekileyo ekukhuseleni iisekethe nezixhobo. Ezi ziqhekezi zesekethe ezincinci zenzelwe ukuphazamisa ngokuzenzekelayo ukuhamba kombane xa kufunyenwe impazamo, zithintele umonakalo onokubakho kwinkqubo kwaye ziqinisekise ukhuseleko lwabasebenzi. Inkalo ebalulekileyo ye-MCB luhlobo lwe-trip curve, olumisela ixesha lokuphendula kunye novavanyo lwangoku lwe-circuit breaker xa ikhubeka. Ukuqonda iintlobo ezahlukeneyo ze-trip curves kubalulekile ekukhetheni i-MCB echanekileyo kwisicelo esithile.

I-tripping curve ye-small circuit breaker ibhekisa kubudlelwane phakathi kwe-magnetic tripping current kunye ne-rated current. Iindidi ezahlukeneyo ze-trip curves ziyafumaneka, nganye ifanelekile kwiintlobo ezahlukeneyo zemithwalo kunye nezicelo. Iindidi ze-trip curve eziqhelekileyo ze-MCBs ziquka Uhlobo A, Uhlobo B, Uhlobo C kunye noHlobo D. Uhlobo ngalunye luneempawu ezithile kwaye lufanelekile kwiimeko ezahlukeneyo, ukusuka ekukhuseleni iisekethe ze-elektroniki ze-semiconductor ukuya kwiindawo zokuqala umthwalo onzima.

I-Type A tripping curve ibonakaliswa yi-magnetic tripping current ye-(2-3) In. Ifanelekile ukukhusela iisekethe ze-elektroniki ze-semiconductor, iisekethe zokulinganisa zee-transformers zamandla aphantsi, okanye iinkqubo ezinemigca emide kunye nee-currents ezincinci. Ii-Type A MCB zenzelwe ukubonelela ngempendulo ekhawulezileyo kwiimpazamo ezisezantsi, nto leyo ezenza zilungele izixhobo ze-elektroniki ezinobuthathaka kunye neesekethe ezifuna ukhuseleko oluchanekileyo.

Umsinga we-magnetic tripping current we-type B tripping curve yi-(3-5) In. Ezi MCB zifanelekile kwimithwalo ekhuselayo kuphela kunye neesekethe zokukhanyisa eziphantsi kwe-voltage. Zisetyenziswa kakhulu kwiinkqubo zokusasazwa kwamandla emakhaya, kwizixhobo zasekhaya nakwikhuseleko lomntu. Ii-MCB zohlobo lwe-B zibonelela ngokhuseleko olusebenzayo kwiintlobo ngeentlobo zezicelo zokuhlala nezezorhwebo.

Umsinga we-magnetic tripping we-Type C tripping curve yi-(5-10) In. Ezi MCB zifanelekile kwimithwalo yokungenisa kunye neesekethe zokukhanyisa ezinobuthathaka obuphezulu. Zisetyenziswa rhoqo ukukhusela imigca yokusasaza kunye neesekethe zokukhanyisa ezinemisinga yokuhambisa ephezulu. Ii-Type C MCBs zinokuguquguquka kwaye zifanelekile ukusetyenziswa kumashishini ahlukeneyo apho kufuneka ukhuseleko oluchanekileyo lwemithwalo yokungenisa.

Ijika lokuhamba kohlobo lwe-D libonakaliswa ngumsinga wokuhamba wemagnethi we-(10-20) In. Ezi MCB zifanelekile kwiinkqubo ezinemithwalo enamandla kakhulu kunye nemisinga emikhulu yokuhamba kohlobo lwe-inrush. Zihlala zisetyenziselwa ukukhusela izixhobo ezinemisinga ephezulu yokuhamba kohlobo lwe-inrush, njengee-transformers kunye neevalvu ze-solenoid. IiMCB zohlobo lwe-D zenzelwe ukumelana nemithwalo enzima kwaye zibonelele ngokhuseleko oluthembekileyo kwiindawo zoshishino.

Ngamafutshane, ukuqonda ii-tripping curves zeentlobo ezahlukeneyo zee-miniature circuit breakers kubalulekile ekukhetheni i-MCB echanekileyo kwisicelo esithile. Nokuba zikhusela ii-electronic circuits ezinobuthathaka okanye izixhobo zoshishino ezinzima, ii-MCBs ezinohlobo olufanelekileyo lwe-trip curve zibalulekile ekuqinisekiseni ukhuseleko kunye nokuthembeka kweenkqubo zombane. Ngenxa yezakhono zazo ezahlukeneyo, ii-MCBs zihlala ziyinxalenye ebalulekileyo yokhuseleko kunye nokhuseleko lombane kumashishini ahlukeneyo.

Iqela leMutai liqokelele amava angaphezu kweminyaka elishumi okuvelisa nokuthengisa kwi-iziphuli zesekethe, izixhobo zoqhagamshelwano, amandla amabiniiiswitshi zokudlulisela ngokuzenzekelayo (I-ATS) kunye neenkalo ezinxulumene noko. Silangazelela ithuba lokusebenza nani.