A I-circuit breakerinto kagesi evame ukusetshenziswa kumasekhethi e-AC.Imodeli yosizo ngokuvamile yakhiwa othintana naye osusekayo, othintwayo osusekayo kanye nothintwayo omile.Kusekhethi, imodeli yensiza inganqamula ukunikezwa kwamandla, ixhume ukunikezwa kwamandla futhi ivikele okokusebenza kukagesi.Ngokwesakhiwo sayo kanye nesimiso sokusebenza, ingahlukaniswa ibei-single-phase circuit breaker, i-breaker circuit yezigaba ezintathu kanyei-air circuit breaker.I-Circuit breaker, njengedivaysi ephazamisayo phakathi kwesekhethi yokulawula nokunikezwa kwamandla, idlala indima ebalulekile kugridi yamandla.Lapho i-overload yesifunda, i-short circuit kanye namanye amaphutha, ukuvikelwa kwesenzo sikagesi esifike ngesikhathi kuzonqanyulwa, ukuze isifunda sivuleke ukuvikela ukuphepha komuntu siqu kanye nempahla kanye nezinye izinto zokusebenza emonakalweni.Ngakho iI-circuit breakeresetshenziswa kabanzi kusistimu yamandla ibizwa nangokuthi "i-over-undervoltage protector" noma "fuse".Omunye wemisebenzi ebalulekile ukunqamula ugesi ngokuzenzakalelayo lapho kukhona isifunda esifushane.
Isimiso sokusebenza
Lapho i-AC yamanje ngokusebenzisa i-circuit breaker ithintana, ukukhanga kazibuthe, ishayela isenzo somshini wokusebenza, ukuze i-breaker breaker idedele igibele, ngaleyo ndlela isike isekethe.
Ngokwenza, idivayisi yokulibaziseka ingangezwa ukuze isifunda singanqanyulwa kuphela ngemva kokuqedwa kokusebenza kokushintsha phakathi nesikhathi esinqunyiwe.
Lapho i-current-circuit current idlula ku-circuit breaker, insimbi eseduze nokuxhumana iyancibilika futhi ikhishwe ukukhululwa okushisayo ngenxa yamandla e-arc kinetic kanye nokushisa okukhulu okukhiqizwa ukuncibilika kothintana naye, ngaleyo ndlela inqamule yamanje.
Uma inkinobho yamandla ivaliwe noma isifunda esixhunywe kuso sihluleka, i-circuit breaker ingaphula isifunda ngesikhathi esifushane.
Ngokwesakhiwo sesakhiwo sihlukaniswe kwabathathu abangaguquki, abahambahambayo nabamisiwe.
Ngokusho imodi ukukhululwa ihlukaniswe manual kanye electric amafomu amabili.
Ngokusho indlela yokusebenza zingahlukaniswa zibe ukudluliswa ibhande futhi akukho ukudluliswa ibhande izinhlobo ezimbili;
Ukwahlukanisa
(1)Ama-Circuit breakersingahlukaniswa ngegumbi lesiphazamisi se-vacuum (VHV), isango lesiphazamisi se-arc (AVR), ukukhululwa kwe-vacuum (VSD) kanye nesixhumi se-vacuum ngokusho kwendawo yesiphazamisi se-arc.
(2) Ama-breaker circuit angahlukaniswa abe yizinhlobo ezintathu: i-single-phase circuit breaker, i-circuit breaker yezigaba ezintathu kanye ne-air circuit breaker.
(3) Ama-air circuit breaker angahlukaniswa abe yizinhlobo ezimbili, i-AC ne-DC, ngokusho kwabasebenzisi kanye nezindawo ezahlukene zokusetshenziswa.
(4) I-circuit breaker ingase ihlanganiswe nebhange le-air capacitor, i-air inductor nezinye izinto zikagesi ngokwendlela yokufaka, futhi ingasetshenziswa njengento evikelayo kagesi.
(5) Ahlukaniswa ngohlobo lokuvikela olwedlulele, uhlobo lokuvikela isifunda esifushane kanye nohlobo lokuvikela i-over-under-voltage ngokuya ngezici zawo zokuvikela.
(6) Kukhona i-100V yochungechunge lwe-voltage yenhloso evamile yomoya kanye namabanga amanje ngokuya nge-voltage elinganiselwe kanye namanani amanje.
Ipharamitha yokucaciswa
Uhlobo lwe-circuit breaker luyafana nolwezinye izinto zikagesi, njengekhodi eyakhiwe izinhlamvu “P”, “Y” namadijithi okushintshanisa okusabalalisa, kanye nekhodi eyakhiwe ngohlamvu “C” namadijithi okushintshwa kommese. , njll., kodwa imisebenzi nezakhiwo zazo ngokusobala zihlukile futhi ngokuvamile azikwazi ukusetshenziselwa izinhloso ezijwayelekile.Thatha i-ZF6 ne-ZF14 njengesibonelo.
I-2) I-voltage elinganiselwe: ibhekisela enanini elilinganiselwe i-breaker yesifunda elingakwazi ukulithwala ngaphansi kwe-frequency elinganiselwe (50Hz) kanye ne-frequency elinganiselwe (25Hz).
I-3) Isilinganiso samanje: sibhekisela kumthamo omkhulu wamanje osebenza lapho i-breaker circuit ingakwazi ukumelana ngaphansi kwezimo ezithile.
4. “Amandla okuphula” asho ukuthi isiphazamisi sesekhethi singanqamula ngokuthembekile i-AC 50Hz noma i-DC 1000V noma ngaphansi ngaphansi kwemibandela enqunyiwe, futhi isikhathi sokuphuka akumele sidlule ku-5ms.
5) Izici zokusebenza
Isimiso sokukhetha
1. Ihlukaniswe yaba:
(1) Ama-circuit breaker esigaba esisodwa abhekisa kulawo asetshenziselwa ukuvikela amasekhethi, amamotho kanye nezinye izinto zikagesi.I-circuit breaker inezinzuzo zokusebenza okungajwayelekile nokuba lula, kodwa kuyadingeka ukunqamula ukunikezwa kwamandla ngesikhathi lapho ulayini kanye nemoto kugcwele kakhulu noma kufinyezwa ukuvimbela ingozi ekukhuleni.Ngakho-ke, i-breaker circuit kufanele ihlangabezane nezidingo zokunqamula ukunikezwa kwamandla ngaphakathi kwesikhathi esinqunyiwe, ngesikhathi esifushane sokuphumula, ukukhetha okuhle nokunye.
(2) Igama elithi “isigaba sesithathu se-AC low-voltage circuit breaker” libhekisela kumshini wokuphula isekethe osetshenziswa ekuvikeleni nasekulawuleni amasekhethi, anomsebenzi ofanayo nowesigaba esisodwa esihlukanisa isekethe, kodwa sengeze iswishi yokunqamula isakhiwo sangaphakathi sezinto ezisebenza ngogesi ukuze kuhlangatshezwane nezidingo zokuvikela izinjini kanye namasekhethi okulawula kumasekhethi e-AC.Ngaphezu kwalokho, iphinde ibe ne-overload relay, i-undervoltage relay kanye ne-zero sequence relay yamanje.
Isikhathi sokuthumela: Feb-17-2023