A I-circuit breakeriyithuluzi likagesi elivame ukusetshenziswa kumasekethe e-AC. Imodeli yokusetshenziswa ngokuvamile yakhiwa ukuxhumana okuhambayo, ukuxhumana okuhambayo kanye nokuxhumana okungaguquki. Kusekethe, imodeli yokusetshenziswa inganqamula ukunikezwa kwamandla, ixhume ukunikezwa kwamandla futhi ivikele imishini kagesi. Ngokwesakhiwo sayo kanye nomgomo wayo wokusebenza, ingahlukaniswa ibei-circuit breaker yesigaba esisodwa, i-circuit breaker enezigaba ezintathu kanyei-air circuit breaker. I-circuit breaker, njengedivayisi yokuphazamisa phakathi kwesekethe yokulawula kanye nokunikezwa kwamandla, idlala indima ebalulekile kugridi yamandla. Lapho isekethe igcwele ngokweqile, isekethe esifushane kanye nezinye izinkinga, ukuvikelwa kwesenzo sikagesi ngesikhathi esifanele kuzonqanyulwa, ukuze isekethe ivuleke ukuvikela ukuphepha komuntu siqu kanye nempahla kanye neminye imishini ekulimaleni. Ngakho-keI-circuit breakerEsetshenziswa kabanzi ohlelweni lwamandla ibizwa nangokuthi “isivikelo esingaphansi kwamandla kagesi” noma “i-fuse”. Omunye wemisebenzi ebalulekile ukunqamula ngokuzenzakalelayo ukunikezwa kwamandla uma kune-short circuit.
Isimiso sokusebenza
Uma i-AC yamanje ngokusebenzisa i-circuit breaker ixhumana, ukukhanga kwe-electromagnetic, okushayela isenzo sendlela yokusebenza, ukuze i-circuit breaker ikhulule ukukhubeka, ngaleyo ndlela inqume i-circuit.
Empeleni, idivayisi yokulibazisa ingangezwa ukuze isekethe inqanyulwe kuphela ngemva kokuba umsebenzi wokushintsha usuqediwe ngesikhathi esibekiwe.
Uma ugesi we-short-circuit udlula ku-circuit breaker, insimbi eseduze nendawo ethintanayo iyancibilika futhi idonswe ukukhishwa kokushisa ngenxa yamandla e-arc kinetic kanye nokushisa okukhulu okubangelwa ukuncibilika kwendawo ethintanayo, ngaleyo ndlela inqamule ugesi.
Uma inkinobho yamandla ivaliwe noma isekethe exhunywe kuyo yehluleka, i-circuit breaker ingaphula isekethe ngesikhathi esifushane.
Ngokusho kwesakhiwo, ihlukaniswe yaba yizicucu ezintathu ezihleliwe, ezihambayo nezimisiwe.
Ngokusho kwemodi yokukhululwa ihlukaniswe ngezinhlobo ezimbili zesandla kanye nezikagesi.
Ngokusho kwendlela yokusebenza, izinhlobo ezimbili zingahlukaniswa zibe ukudluliselwa kwebhande kanye nokudluliselwa okungenalo ibhande;
Ukuhlukaniswa
(1)Ama-circuit breakeringahlukaniswa ibe yigumbi lokuphazamisa i-vacuum (VHV), isango lokuphazamisa i-arc (AVR), ukukhululwa kwe-vacuum (VSD) kanye ne-vacuum contactor ngokwendlela yokuphazamisa i-arc.
(2) Ama-circuit breaker angahlukaniswa ngezinhlobo ezintathu: i-single-phase circuit breaker, i-three-phase circuit breaker kanye ne-air circuit breaker.
(3) Ama-air circuit breaker angahlukaniswa ngezinhlobo ezimbili, i-AC ne-DC, ngokuya ngabasebenzisi kanye nezindawo ezahlukene zokusebenzisa.
(4) I-circuit breaker ingahlanganiswa ne-air capacitor bank, i-air inductor kanye neminye imishini kagesi ngokwendlela yokufaka, futhi ingasetshenziswa njengethuluzi likagesi elivikelayo.
(5) Zihlukaniswe ngohlobo lokuvikela olusebenzisa amandla amaningi, uhlobo lokuvikela olusebenzisa amandla amancane kanye nohlobo lokuvikela olusebenzisa amandla amaningi ngokwezici zazo zokuvikela.
(6) Kukhona i-voltage yomoya yochungechunge lwe-100V kanye namazinga wamanje ngokwe-voltage yawo elinganisiwe kanye namanani wamanje.
Ipharamitha yokucaciswa
Uhlobo lwe-circuit breaker lufana nolwezinye izinto zikagesi, njengekhodi eyakhiwe ngezinhlamvu ezithi “P”, “Y” kanye nezinombolo zamaswishi okusabalalisa, kanye nekhodi eyakhiwe ngohlamvu “C” kanye nezinombolo zamaswishi ommese, njll., kodwa imisebenzi nezakhiwo zazo kusobala ukuthi zihlukile futhi ngokuvamile azikwazi ukusetshenziselwa izinjongo ezijwayelekile. Thatha i-ZF6 kanye ne-ZF14 njengesibonelo.
2) I-voltage elinganisiwe: ibhekisela enanini elilinganisiwe elingathwalwa yi-circuit breaker ngaphansi kwemvamisa elinganisiwe (50Hz) kanye nemvamisa elinganisiwe (25Hz).
3) Ugesi olinganisiwe: ubhekisela kugesi osebenzayo ophezulu kakhulu ongamelana nawo i-circuit breaker ngaphansi kwezimo ezithile.
4. “Umthamo wokuphuka” usho ukuthi i-circuit breaker inganqamula i-AC 50Hz noma i-DC 1000V noma ngaphansi ngokuthembekile ngaphansi kwemibandela ebekiwe, futhi isikhathi sokuphuka akufanele sidlule ama-5ms.
5) Izici zokusebenza
Isimiso sokukhetha
1, Ihlukaniswe ngezigaba:
(1) Ama-circuit breaker esigaba esisodwa abhekisela kulawo asetshenziselwa ukuvikela ama-circuit, ama-motor kanye neminye imishini kagesi. I-circuit breaker inezinzuzo zokusebenza okungajwayelekile kanye nokulula, kodwa kuyadingeka ukunqamula ukunikezwa kwamandla ngesikhathi lapho ulayini kanye ne-motor kugcwele ngokweqile noma kufinyezwe i-circuit ukuze kuvinjelwe ingozi ukuthi ikhule. Ngakho-ke, i-circuit breaker kufanele ihlangabezane nezidingo zokunqamula ukunikezwa kwamandla ngaphakathi kwesikhathi esibekiwe, ngesikhathi esifushane sokunqamula, ukukhetha okuhle njalo njalo.
(2) Igama elithi “i-circuit breaker ye-AC enezigaba ezintathu” libhekisela ku-circuit breaker esetshenziswa kuma-circuit okuvikela nokulawula izimoto, enomsebenzi ofanayo ne-circuit breaker yesigaba esisodwa, kodwa engeze iswishi yokuxhuma esakhiweni sangaphakathi sedivayisi kagesi ukuze ihlangabezane nezidingo zokuvikela ama-motor nama-control circuits kuma-AC circuits. Ngaphezu kwalokho, iphinde ibe ne-overload relay, i-undervoltage relay kanye ne-zero sequence current relay.
Isikhathi sokuthunyelwe: Feb-17-2023