Intshayelelo kwiMolded Case Circuit Breaker (MCCB)

Intshayelelo yeUmqhekezi weSekethe yeTyala eliQokelelweyo (I-MCCB) iguqule indlela esikhusela ngayo iisekethe nezixhobo. Esi sixhobo sitsha senzelwe ukunqanda ngokuzenzekelayo ukuhamba kombane xa udlula ucwangciso lohambo, ngaloo ndlela sibonelela ngokhuseleko olusisiseko ngokuchasene nokugqithisa, i-short circuit kunye ne-ground failure. I-MCCB igcinwe kwi-casing yeplastiki kwaye isebenzisa ii-insulators zeplastiki ukwahlula ii-conductors kunye neendawo zesinyithi ezisekelwe phantsi. Ngoluhlu olubanzi lweempawu kunye neendlela, i-MCCB sisisombululo esinokusetyenziswa ngeendlela ezahlukeneyo.

Ii-MCCB zihlala zineyunithi yokuhamba ngemagnethi eshushu, kodwa iimodeli ezinkulu zinokuxhotyiswa ngee-sensors zokuhamba eziqinileyo. Ezi yunithi zokuhamba zibonelela ngomsebenzi osisiseko wokuvula isekethe xa kukho impazamo. Uhambo lunokwahlulwa lube ziintlobo ezimbini: ukufudumala ngemagnethi eshushu kunye nokukhwela nge-elektroniki, okuvumela abasebenzisi ukuba bakhethe ngokuguquguquka ukhuseleko olufanelekileyo ngokweemfuno zabo ezithile. Ukongeza, i-MCCB ifumaneka kwiindidi ezahlukeneyo zangoku kuquka i-16, 25, 30, 40, 50, 63, 80, 100, 125, 160, 200, 225, 250, 315, 350, 400, 500 kunye ne-630A, okwenza ifaneleke kwiindlela ezahlukeneyo zomthwalo.

Enye yezona zinto ziphambili ze-MCCB kukwakhiwa kwayo okuvaliweyo ngaphakathi kwendlu yeplastiki. Olu yilo luqinisekisa ukuba zonke izinto ze-molded case circuit breaker zikhuselwe ngokufanelekileyo kwiimeko zokusingqongileyo, nto leyo ephucula ukuthembeka kunye nobomi benkonzo yesixhobo. Ngaphezu koko, oonxibelelwano abancedisayo, ukukhululwa kwe-undervoltage kunye nokukhululwa kwe-shunt ikakhulu ziimodyuli kwaye zinokwenziwa ngokwezifiso kwaye zidityaniswe nemisebenzi eyongezelelweyo njengoko kufuneka. Nangona ulwakhiwo oluncinci lwe-molded case circuit breaker luthintela ukulungiselelwa, lubonelela ngokulula kokusebenza ngesandla kunye neendlela ezinkulu zokutshintsha umbane ukuhlangabezana neemfuno ezahlukeneyo zabasebenzisi kwizicelo ezahlukeneyo.

I-MCCB ikwabonelela ngokukhetha ukukhutshwa kwe-elektroniki overcurrent, ezahlulwe zibe ziintlobo ezimbini: i-Class A kunye ne-Class B. i-Class B MCCB ibonelela ngeempawu zokhuseleko ezikumgangatho wesithathu, ezenza ukuba zilungele usetyenziso oluneemfuno zokuthembeka okuphezulu kunye nokusebenza. Kwelinye icala, i-Class A MCCB ene-thermal magnetic tripper inesabelo esiphezulu semarike ngenxa yokusebenza kwayo kakuhle. Zombini ezi ntlobo ze-MCCB zilungele usetyenziso olwahlukeneyo lwemizi-mveliso nolwezorhwebo, zibonelela ngokhuseleko oluyimfuneko lweziphene zombane kunye nokuqinisekisa ukhuseleko kunye nokuthembeka kweenkqubo zombane.

Ngamafutshane, ii-plastic case circuit breakers (ii-MCCB) zizinto ezibalulekileyo kwiinkqubo zombane zanamhlanje, zibonelela ngeempawu zokhuseleko oluphambili kunye nokusebenza okuthembekileyo. Ngendlu yayo yeplastiki evaliweyo, izinto eziguquguqukayo kunye noluhlu lweendlela zokukhetha iiyunithi zokuhamba, i-MCCB ifanelekile kwiindidi ezahlukeneyo zomthwalo kunye nokusetyenziswa. Nokuba ikhusela iisekethe zamasebe okanye ibonelela ngokhuseleko oluphezulu lwenqanaba lesi-3, ii-MCCB zizixhobo ezinokuguquguquka nezibalulekileyo zokuqinisekisa ukhuseleko kunye nokuthembeka kweenkqubo zombane.