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 wesekethe ye-conductor (izaphuli zesekethe ngoku ngaphezulu kwesakhiwo somda wangoku ukunyusa umthamo wokuqhekeka kwemveliso) okanye ukuvuthuza kwemagnethi, ukuze i-arc ishukume 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 yesekethe emfutshane emgceni, umsinga udlula inani lamaxesha akhoyo, amandla e-electromagnetic aveliswa nguzibuthe we-electromagnetic makhulu kunamandla okusabela entwasahlobo, i-armature ifunxwa ngumazibuthe we-electromagnetic ngendlela yokuhambisa ukukhuthaza indlela yokukhulula simahla ukukhulula abafowunelwa abaphambili. 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 ingxubevange yesinyithi inophawu, oko kukuthi, intsimbi eyahlukileyo okanye ingxubevange yesinyithi kwimeko yobushushu, ukwandiswa kotshintsho lwevolumu ayihambelani, ngoko ke xa ishushu, izinto ezimbini ezahlukeneyo zesinyithi okanye ukwakheka kwealloyi yephepha le-bimetallic, kuya kuba kukwandiswa komlinganiso wecala lecala eliphantsi lokugoba, ukukhuthaza ukukhululwa kwe-rota ukugoba, ukusetyenziswa kwe-rota ukukhululwa kwe-curry. inyathelo lokukhubeka, ukuze kuqatshelwe ukhuseleko lomthwalo ogqithisileyo. 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 angama-3-5 akhoyo ngoku alinganisiweyo, ngokuqhelekileyo asetyenziselwa imithwalo ecocekileyo yokumelana kunye neesekethe zokukhanyisa ezisezantsi, ezisetyenziswa ngokuqhelekileyo kwibhokisi yokusasazwa kwamakhaya ukukhusela izixhobo zasekhaya kunye nokhuseleko lomntu, olusetyenziswa ngaphantsi ngoku.
(3) I-C-type breaker breaker: I-5-10 amaxesha akhoyo ngoku alinganisiweyo, kufuneka akhululwe ngaphakathi kwemizuzwana ye-0.1, iimpawu ze-circuit breaker zisetyenziswa ngokuqhelekileyo, zisetyenziswa ngokuqhelekileyo ekukhuseleni imigca yokusabalalisa kunye neesekethe zokukhanyisa kunye nokujika okuphezulu.
(4) I-D-type breaker breaker: amaxesha angama-10-20 i-current rated current, ngokukodwa kwindawo ehlala iphezulu ngokukhawuleza yangoku yezixhobo zombane, ngokuqhelekileyo isetyenziswa ngaphantsi kwentsapho, ngenxa yemithwalo ephezulu yokuphefumula kunye nenkqubo enkulu yangoku ye-inrush, esetyenziswa ngokuqhelekileyo ekukhuselweni kwezixhobo ezinombane ophezulu.
(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