Umkhiqizo
Isiphazamisi seVacuum se-MV VCB, VS1 ZN28 ZN63
Incazelo emfushane yomkhiqizo:
Uma iphutha lenzeka ohlelweni, othintana nabo bephula bayahlukaniswa futhi yingakho i-arc ithuthukiswa phakathi kwabo.Lapho othintana nabo abaphethe njengamanje behlukaniswa, izinga lokushisa lezingxenye zabo zokuxhuma liphezulu kakhulu ngenxa yokuthi kwenzeka ionization.Ngenxa ye-ionization, indawo yokuxhumana igcwele umhwamuko wama-ion aqondile akhishwa kuzinto zokuthintana.
Ukuminyana komhwamuko kuncike ku-current in the arcing.Ngenxa yokuncipha kwemodi yegagasi lamanje izinga labo lokukhululwa kokuwa komhwamuko nangemva kukaziro wamanje, okuphakathi kuthola amandla ako e-dielectric uma kunikezwe ukuminyana komhwamuko ozungeze abathintwayo abancishiwe.Ngakho-ke, i-arc ayiphindi ibambezeleke futhi ngoba umhwamuko wensimbi ususwa ngokushesha endaweni yokuxhumana.
Lalela
Lawula ngokuqinile isivinini sokuvala nokuvula se-vacuum circuit breaker.
Ku-vacuum circuit breaker enesakhiwo esithile, umenzi uchaze isivinini sokuvala esingcono kakhulu.Uma isivinini sokuvala se-vacuum circuit breaker siphansi kakhulu, ukuguga kokuxhumana kuzokhuphuka ngenxa yokwandiswa kwesikhathi sangaphambi kokuhlukana;Lapho i-vacuum circuit breaker inqanyuliwe, isikhathi se-arcing sifushane, futhi isikhathi saso esiphezulu se-arcing asidluli i-1.5 power frequency half wave.Kudingeka ukuthi lapho lamanje liwela uziro okokuqala ngqa, igumbi lokucisha i-arc kufanele libe namandla anele okufakwa ngaphakathi.Ngokuvamile, kulindelekile ukuthi ukushaya kothintana naye ku-wave yesigamu samandla kuzofinyelela ku-50% - 80% we-stroke egcwele ngesikhathi sokuphuka kwesifunda.Ngakho-ke, isivinini sokuvula se-breaker circuit kufanele silawulwe ngokuqinile.Njengoba igumbi lokucisha i-arc le-vacuum circuit breaker ngokuvamile lithatha inqubo yokubhula, amandla ayo okusebenza awaphezulu, futhi ukumelana kwayo nokudlidliza kuphansi.Isivinini esikhulu sokuvala se-circuit breaker sizodala ukudlidliza okukhulu, futhi sizoba nomthelela omkhulu ekuvutheleni, kunciphise impilo yesevisi yokuvunguza.Ngakho-ke, isivinini sokuvala se-vacuum circuit breaker ngokuvamile sisethwa njenge-0.6 ~ 2m / s.
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