umaphuli:
I-circuit breaker ibhekisela kwisixhobo sokutshintsha esinokuthi siqhube, sithwale kwaye siphule amandla akhoyo phantsi kweemeko zesekethe eziqhelekileyo, kunye nokuziphatha, ukuthwala kunye nokuphuka kwangoku phantsi kweemeko zesiphaluka ezingaqhelekanga kwixesha elithile.Ii-Circuit breakers zahlulahlulwe zibe zii-high-voltage circuit breakers kunye ne-low-voltage circuit breakers ngokwe-scope yesicelo, kwaye imida phakathi kwe-voltage ephezulu kunye nephantsi ayicacanga.Ngokubanzi ngaphezu kwe-3kV kuthiwa zizixhobo zombane ezinevoltage ephezulu.
Ii-Circuit breakers zingasetyenziselwa ukuhambisa amandla ombane, ukuqala ii-asynchronous motors ngokungaqhelekanga, ukukhusela imigca yamandla kunye neenjini, kwaye zinqumle ngokuzenzekelayo iisekethe xa kukho ukugqithiswa okukhulu, isiphaluka esifutshane, ukungabikho kombane kunye nezinye iimpazamo.Umsebenzi wayo ulingana nokudibanisa i-fuse switch kunye ne-overheat kunye ne-underheat relay.Ngaphezu koko, ngokuqhelekileyo akukho mfuneko yokutshintsha iindawo emva kokuphula impazamo yangoku.Sele isetyenziswa ngokubanzi ngoku.
Ukuhanjiswa kombane likhonkco elibaluleke kakhulu ekuveliseni, ekugqithiseni nasekusetyenzisweni kombane.Inkqubo yokuhambisa amandla ibandakanya izixhobo zombane eziphezulu neziphantsi.Izaphuli zesekethe zombane ophantsi zizixhobo zombane ezinomthamo omkhulu wokusetyenziswa kunye noluhlu olubanzi lwezicelo.
umgaqo wokusebenza:
I-breaker circuit ngokubanzi iqulunqwe yinkqubo yoqhagamshelwano, inkqubo yokucima i-arc, indlela yokusebenza, ukukhululwa, kunye ne-casing.
Kwimeko yesiphaluka esifutshane, intsimi yamagnetic eyenziwa ngumbane omkhulu (ngokuqhelekileyo i-10 ukuya kumaxesha e-12) inqoba i-reaction force spring, ukukhululwa kudonsa indlela yokusebenza ukuba isebenze, kwaye utshintsho luhamba ngokukhawuleza.Xa i-overloading, ukunyuka kwangoku, isizukulwana sokushisa siyanda, kwaye i-bimetal deforms ukuya kwinqanaba elithile ukukhuthaza ukuhamba kwendlela (inkulu yangoku, ifutshane ixesha lesenzo).
Kuhlobo lwe-elektroniki, i-transformer isetyenziselwa ukuqokelela ubukhulu besigaba ngasinye sangoku kwaye ithelekise nexabiso elimiselweyo.Xa ikhoyo ngoku ingaqhelekanga, i-microprocessor ithumela umqondiso ukwenza ukukhutshwa kombane kuqhube indlela yokusebenza ukuze isebenze.
Umsebenzi we-circuit breaker ukunqumla kunye nokudibanisa isiphaluka somthwalo, ukunqumla isiphaluka sesiphambeko, ukuthintela ingozi ekwandiseni, nokuqinisekisa ukusebenza okukhuselekileyo.I-high-voltage circuit breaker idinga ukuphula i-arc ye-1500V kunye ne-1500-2000A yangoku.Ezi arcs zinokolulwa ukuya kwi-2m kwaye ziqhubeke nokutshisa.Ngoko ke, ukucima i-arc yingxaki ekufuneka i-high-voltage circuit breakers iyisombulule.
Umgaqo wokucima i-arc ikakhulu ukupholisa i-arc ukwenza buthathaka ukuhlukana kwe-thermal.Ngakolunye uhlangothi, ukuvuthela kwe-arc kwandisa i-arc, yomeleza ukuhlanganiswa kunye nokusasazwa kwamasuntswana ahlawuliweyo, kwaye kwangaxeshanye kuqhume amasuntswana ahlawuliweyo kwi-arc gap, ngokukhawuleza ukubuyisela amandla e-dielectric.
I-voltage ephantsi, + ekwabizwa ngokuba yi-automatic air switch, inokusetyenziselwa ukutshintshela nokucima iisekethe zomthwalo, kwaye ingasetyenziselwa ukulawula iimotor eziqala ngokungaqhelekanga.Umsebenzi wayo ulingana nesixa senxalenye okanye yonke imisebenzi yokutshintsha imela, i-overcurrent relay, i-voltage loss relay, i-thermal relay kunye nesikhuseli sokuvuza, kwaye sisixhobo esibalulekileyo sokukhusela kuthungelwano losasazo lwe-voltage ephantsi.
I-low-voltage circuit breakers inemisebenzi emininzi yokukhusela (i-overload, i-short-circuit, i-under-voltage protection, njl.), ixabiso lesenzo esilungelelaniswayo, umthamo ophezulu wokuphulwa, ukusebenza kakuhle, ukhuseleko kunye nezinye izinto eziluncedo, ngoko zisetyenziswa ngokubanzi.Isakhiwo kunye nomgaqo wokusebenza I-low-voltage circuit breaker iqulunqwe yindlela yokusebenza, oonxibelelwano, izixhobo zokukhusela (ukukhutshwa okuhlukeneyo), kunye nenkqubo yokucima i-arc.
Abafowunelwa abaphambili be-voltage ye-circuit breaker zisebenza ngesandla okanye zivaliwe ngombane.Emva kokuba abafowunelwa abaphambili bevaliwe, indlela yokuhamba yasimahla ivala abafowunelwa abaphambili kwindawo evaliweyo.I-coil yokukhutshwa kwe-overcurrent kunye ne-thermal element yokukhululwa kwe-thermal idibaniswe kwichungechunge kunye nesekethe eyintloko, kwaye i-coil yokukhutshwa kwe-undervoltage ixhunywe ngokuhambelana nokunikezelwa kwamandla.Xa isiphaluka sifutshane okanye sigxininiswe kakhulu, i-armature yokukhululwa kwe-overcurrent ikhutshwe, ukwenzela ukuba ukukhutshwa kwamahhala kusebenze, kwaye uqhagamshelwano oluphambili luqhawula isiphaluka esikhulu.Xa isekethe igcwele kakhulu, i-thermal element yeyunithi yohambo lwe-thermal iya kufudumala, igobe i-bimetal, ngaloo ndlela ityhala indlela yohambo lwasimahla ukuba lusebenze.Xa isiphaluka singaphantsi, i-armature ye-undervoltage release ikhutshwe.Kwaye indlela yohambo lwasimahla nayo iyasebenza.Isixhobo sohambo olunxuseneyo sisetyenziselwa ulawulo olude.Ngethuba lokusebenza okuqhelekileyo, i-coil yayo i-de-energized.Xa kufuneka ulawulo lomgama, cofa iqhosha lokuqala ukunika amandla ikhoyili.
Ixesha lokuposa: Oct-15-2022