NgoSeptemba 13, 2021, Hlalutya umgaqo wokusebenza wei-box-type circuit breakers
Izaphuli zesekethe ngokubanzi zenziwe ngenkqubo yoqhagamshelwano, inkqubo yokucima i-arc, indlela yokusebenza, iyunithi yohambo, iqokobhe njalo njalo.
Xa isiphaluka esifutshane sisenzeka, i-magnetic field eveliswa yi-current enkulu (ngokuqhelekileyo i-10 ukuya kwi-12 amaxesha) iyoyisa i-reaction force spring, iyunithi yohambo idonsa indlela yokusebenza, kwaye utshintsho luhamba ngokukhawuleza.Xa i-overload, i-current iba nkulu, isizukulwana sobushushu siyanda, kwaye i-bimetal deforms ukuya kwinqanaba elithile ukutyhala umatshini wokuhamba (inkulu yangoku, ifutshane ixesha lesenzo).
Kukho uhlobo lwe-elektroniki olusebenzisa i-transformer ukuqokelela okwangoku kwinqanaba ngalinye kwaye lithelekise nexabiso elimiselweyo.Xa ikhoyo ngoku ingaqhelekanga, i-microprocessor ithumela umqondiso ukwenza iyunithi yohambo lwe-elektroniki iqhube indlela yokusebenza.
Umsebenzi we-circuit breaker ukunqumla kunye nokudibanisa isiphaluka somthwalo, kunye nokunqumla isiphaluka sesiphambeko, ukuthintela ukwandiswa kwengozi kunye nokuqinisekisa ukusebenza okukhuselekileyo.I-high-voltage breaker breaker idinga ukuphula i-1500V, i-arc yangoku ye-1500-2000A, ezi zi-arcs zinokolulwa ukuya kwi-2m kwaye ziqhubeke zivutha ngaphandle kokucima.Ngoko ke, ukucima i-arc yingxaki ekufuneka isonjululwe ngamaqhekeza aphezulu ombane.
Umgaqo wokuvuthela i-arc kunye nokucima i-arc ikakhulu ukupholisa i-arc ukwenza buthathaka ukuhlukana kwe-thermal.Ngakolunye uhlangothi, i-arc yoluliwe yi-arc ukuqinisa ukubuyiswa kwakhona kunye nokusabalalisa kweengqungquthela ezihlawulisiweyo, kwaye ngexesha elifanayo, iinqununu ezihlawulisiweyo kwi-gap ye-arc zitshitshiswa ngokukhawuleza ukubuyisela amandla e-dielectric ophakathi.
I-low-voltage circuit breakers ikwabizwa ngokuba yi-automatic air switches, engasetyenziselwa ukudibanisa kunye nokuqhawula iisekethe zomthwalo, kwaye ingasetyenziselwa ukulawula iimoto eziqala ngokungaqhelekanga.Umsebenzi wayo ulingana nesimbuku seminye okanye yonke imisebenzi yokutshintsha kweemela, ii-overcurrent relays, ii-voltage loss relays, ii-thermal relays kunye nezikhuseli zokuvuza.Sisixhobo sombane esikhuselayo esibalulekileyo kuthungelwano lwe-voltage ephantsi.
I-low-voltage circuit breakers inemisebenzi eyahlukeneyo yokukhusela (umthwalo ogqithisiweyo, isiphaluka esifutshane, ukukhuselwa kwe-undervoltage, njl.), ixabiso lesenzo esilungelelaniswayo, umthamo ophezulu wokuphulwa, ukusebenza kakuhle, ukhuseleko, njl., Ngoko ke zisetyenziswa ngokubanzi.Isakhiwo kunye nomgaqo wokusebenza I-low-voltage circuit breaker iqulunqwe yindlela yokusebenza, oonxibelelwano, izixhobo zokukhusela (ukukhutshwa okuhlukeneyo), inkqubo yokucima i-arc, njl.
Uqhagamshelwano oluphambili lwe-low-voltage circuit breaker lusebenza ngesandla okanye luvalwe ngombane.Emva kokuba uqhagamshelwano oluphambili luvaliwe, indlela yohambo lwasimahla ivala umfowunelwa oyintloko kwindawo yokuvala.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 ye-overcurrent release idonsa, ibangela ukuba i-free tripping mechanism isebenze, kwaye uqhagamshelwano oluphambili luqhawula isiphaluka esikhulu.Xa isiphaluka sigcwele kakhulu, into yokufudumala yeyunithi yohambo lwe-thermal iya kugoba i-bimetal kwaye ityhale indlela yokuhamba yamahhala ukuhamba.Xa isiphaluka singaphantsi kwe-voltage, i-armature ye-under-voltage release ikhutshwe.Indlela yohambo lwasimahla nayo iyasebenza.Ukukhutshwa kwe-shunt kusetyenziselwa ulawulo olude.Ngethuba lokusebenza okuqhelekileyo, i-coil yayo iyanqunyulwa.Xa kufuneka ulawulo lomgama, cofa iqhosha lokuqala ukunika amandla ikhoyili.
Ixesha lokuposa: Sep-13-2021
