I-icro Circuit Breaker (i-MCB ngokufutshane) yenye yezona zixhobo zisetyenziswa kakhulu kwi-terminal yokukhusela izixhobo zombane zombane. Ngokuqhelekileyo isetyenziselwa isigaba esisodwa kunye nesigaba sesithathu sesiphaluka esifutshane, ukugqithiswa kunye nokukhuselwa kwe-voltage ngaphezulu kwe-125A, kwaye ngokuqhelekileyo ifumaneka kwi-pole-single, i-double-pole, i-pole-tatu kunye ne-four-pole options. Umsebenzi oyintloko we-miniature circuit breaker (MCB) kukutshintsha isiphaluka, oko kukuthi xa i-current ngokusebenzisa i-miniature circuit breaker (MCB) idlula ixabiso elibekwe yiyo, iya kuqhekeza ngokuzenzekelayo isiphaluka emva kwexesha elithile lokulibaziseka. Ukuba iyafuneka, inokutshintsha isekethe kwaye icime ngesandla njengokutshintsha okuqhelekileyo.
I-Miniature Circuit Breaker (MCB) Isakhiwo kunye noMgaqo wokuSebenza
I-Miniature Circuit Breakers (MCB) yenziwe ngezinto ezikhuselayo ze-thermoplastic ezibunjiweyo kwindlu enomatshini, i-thermal kunye ne-insulating properties. Inkqubo yokutshintsha ibandakanya abafowunelwa be-static kunye nabashukumayo abashukumayo kunye nabafowunelwa kunye neengcingo eziphumayo ezidityaniswe kunye kunye nokulayisha iitheminali. Abafowunelwa kunye namacandelo akhoyo akhoyo ayenziwe ngobhedu lwe-electrolytic okanye i-alloys yesilivere, ukhetho oluxhomekeke kwi-voltage-current rating ye-breaker circuit.
Xa abafowunelwa behlukana phantsi kweemeko ezigqithisiweyo okanye ezimfutshane, i-arc yenziwa. I-modern miniature circuit breaker (MCB) isetyenziselwa ukuphazamisa okanye ukuphelisa ukuyila kwe-arc, ukufunxa amandla e-arc kunye nokupholisa ngegumbi lokucima i-arc kwi-metal arc spacer ukuqonda, ezi zikhewu ze-arc ezine-insulated bracket ezimiswe kwindawo efanelekileyo. Ukongeza, ukusetyenziswa kwamandla ombane we-conductor wesekethe (izaphuli zesekethe ngoku zingaphezulu kwesakhiwo sokunciphisa imveliso) okanye ukuvuthuza kwemagnethi, ukuze i-arc ihambe ngokukhawuleza kwaye yandiswe, ngejelo lokuhamba kwe-arc ukuya kwigumbi lokuphazamiseka. .
Umatshini wokusebenza we-miniature circuit breaker (MCB) unesixhobo sokukhupha i-solenoid magnetic kunye nesixhobo sokukhupha i-bimetal thermal. Isixhobo sokuhlutha samagnetic ngokwenene sisikethi samagnetic. Xa umbane oqhelekileyo ugqithiswa kumgca, amandla e-electromagnetic eyenziwa yi-solenoid ingaphantsi koxinzelelo lwasentwasahlobo ukwenza amandla okuphendula, i-armature ayikwazi ukufunxwa yi-solenoid, kwaye i-breaker circuit isebenza ngokuqhelekileyo. Xa kukho impazamo yesiphaluka esifutshane emgceni, umsinga udlula inani lamaxesha akhoyo aqhelekileyo, amandla e-electromagnetic eveliswa nguzibuthe we-electromagnetic mkhulu kunendlela yokusabela entwasahlobo, i-armature ifunxwa yi-electromagnetic ngokusasaza. indlela yokukhuthaza ukukhululwa kwendlela yokukhulula abafowunelwa abakhulu. Uqhagamshelwano oluphambili luhlukaniswe phantsi kwesenzo se-spring spring ukunqumla isiphaluka ukuze sidlale indima yokukhusela i-short-circuit.
Icandelo eliphambili kwisixhobo sokukhululwa kwe-thermal yi-bimetal, egxininiswe ngokubanzi kwiintsimbi ezimbini ezahlukeneyo okanye i-alloys yensimbi. Isinyithi okanye i-alloy yesinyithi inophawu, oko kukuthi, isinyithi esahlukileyo okanye i-alloy yesinyithi kwimeko yobushushu, ukwandiswa kokutshintsha komthamo akuhambelani, ngoko ke xa ishushubeza izinto ezimbini ezahlukeneyo zetsimbi okanye ingxubevange yokwakheka kwebimetallic. sheet, kuya kuba kumlinganiselo wokwandiswa kwecala lecala eliphantsi lokugoba, ukusetyenziswa kwe-curvature ukukhuthaza ukukhululwa kwentshukumo yokujikeleza, ukuphunyezwa kwesenzo sokukhubeka ukukhululwa, ukuze kuqatshelwe ukukhuselwa kokugqithiswa. Kuba ukukhuselwa komthwalo ogqithisileyo kwenziwa ngefuthe le-thermal, ikwabizwa ngokuba kukukhutshwa kwe-thermal.
Ukukhethwa kweepali ze-1, 2, 3 kunye ne-4 ze-miniature circuit breaker
I-single-pole miniature breakers circuit isetyenziselwa ukubonelela ngokutshintsha kunye nokukhusela kwisigaba esinye sesekethe. Ezi zaphuli zesekethe ziyilelwe ikakhulu iisekethe zombane ophantsi. Ezi zikhewu zesekethe zinceda ekulawuleni iingcingo ezithile, iinkqubo zokukhanyisa okanye iindawo zokuphuma ekhaya. Ezi zinokusetyenziselwa izicoci zokufunxa, iindawo zokukhanyisa ngokubanzi, izibane zangaphandle, iifeni kunye nezivuthela njl.njl.
Iziqhekeza eziphindwe kabini zeepali ezincinci zidla ngokusetyenziswa kwiipaneli zeyunithi yolawulo lwabathengi njengokutshintsha okuphambili. Ukuqala kwimitha yamandla, amandla achithwa kwi-breaker circuit ukuya kwiindawo ezahlukeneyo zendlu. Iziqhekeza zesekethe eziphindwe kabini ze-pole miniature zisetyenziselwa ukubonelela ngokhuseleko kunye nokutshintsha iingcingo zesigaba kunye nezingathathi hlangothi.
Iziqhekeza ezintathu zeepali ezincinci zisetyenziselwa ukubonelela ngokutshintsha kunye nokukhusela kuphela izigaba ezithathu zesekethe, kungekhona ukungathathi hlangothi.
I-four-pole miniature breaker circuit breaker, ngaphezu kokubonelela ngokutshintsha kunye nokukhusela izigaba ezithathu zesekethe, unomhlaseli okhuselayo ngokukodwa kwi-pole pole (umz., N pole). Ngoko ke, i-four-pole miniature circuit breaker kufuneka isetyenziswe nanini na xa kukho imisinga ephezulu engathathi hlangothi inokubakho kuyo yonke isiphaluka.
I-Miniature circuit breaker A (Z), B, C, D, K ukhetho lwe-curve yodidi
(1) A (Z) uhlobo lwe-circuit breaker: amaxesha angama-2-3 alinganiswe ngoku, awafane asetyenziswe, asetyenziselwa ukhuseleko lwe-semiconductor (i-fuses isetyenziswa ngokuqhelekileyo)
(2) I-B-type breaker breaker: Amaxesha ama-3-5 angoku alinganisiweyo, asetyenziswa ngokubanzi kwimithwalo esulungekileyo yokumelana kunye neesekethe zokukhanyisa eziphantsi-voltage, ezisetyenziswa ngokuqhelekileyo kwibhokisi yokuhambisa yamakhaya ukukhusela izixhobo zendlu kunye nokhuseleko lomntu, olusetyenziswa ngaphantsi ngoku. .
(3) I-C-type ye-circuit breaker: amaxesha ama-5-10 i-current rated current, kufuneka ikhutshwe ngaphakathi kwemizuzwana ye-0.1, iimpawu ze-circuit breaker zisetyenziswa ngokuqhelekileyo, zisetyenziswa ngokuqhelekileyo ekukhuseleni imigca yokusabalalisa kunye neesekethe zokukhanyisa ngokujika okuphezulu. -kungoku.
4 ukukhuselwa kwezixhobo ezine-inrush yangoku ephezulu.
(5) I-K-type ye-circuit breaker: amaxesha angama-8-12 i-current rated current, kufuneka ibe kwi-0.1 imizuzwana. Umsebenzi ophambili we-k-uhlobo lwe-miniature circuit breaker kukukhusela nokulawula i-transformer, iisekethe ezincedisayo kunye neenjini kunye nezinye iisekethe ezivela kwi-short-circuit kunye ne-overload. Ilungele imithwalo ye-inductive kunye nemoto enemisinga ephezulu yokungena.
Ixesha lokuposa: Apr-09-2024