Isiphazamisi sevacuum yokutshintsha umthwalo wekhefu (205A)

Ngaphantsi kweemeko ezithile, i-vacuum circuit breaker inokunyanzela i-current in circuit ukuya kwi-zero phambi kwe-zero yendalo (kunye nokuguqulwa kwangoku) kwisiphaluka esitshintshisayo.Ukuba ixesha lokusebenza kwesiphazamisi alilunganga ngokubhekiselele kwi-AC-voltage waveform (xa i-arc icinyiwe kodwa abafowunelwa basahamba kwaye i-ionization ayikachithwa kwi-interrupter), i-voltage inokugqithisa i-gap's withstand voltage.Oku kunokutshisa kwakhona i-arc, kubangele imisinga edlulayo ngequbuliso.Kuyenzeka ukunciphisa inqanaba langoku apho ukunqunyulwa kwenzeka ngokukhetha imathiriyeli yoqhagamshelwano ekhupha umphunga wesinyithi owaneleyo ukuvumela umsinga ukuba ufike kwixabiso eliphantsi kakhulu okanye ixabiso elinguziro. , kodwa oku kunqabile ukuba kwenziwe njengoko kuchaphazela amandla e-dielectric kakubi.
Kule mihla, ngokunqunyulwa okuphantsi kakhulu kwangoku, i-vacuum zesekethe zokuqhawula aziyi kubangela i-overvoltage enokunciphisa ukugquma kwizixhobo ezijikelezileyo.
Igumbi lokucima i-arc yevacuum, ekwabizwa ngokuba ityhubhu yokutshitsha, lelona candelo liphambili lokutshintsha amandla.Umsebenzi walo oyintloko kukwenza isiphaluka sicime ngokukhawuleza i-arc kwaye sicinezele i-current emva kokuqhawula ukunikezelwa kwamandla ngokusebenzisa i-vacuum insulation egqwesileyo kwi-tube, ukwenzela ukuba ugweme iingozi kunye neengozi.
Abafowunelwa baphethe i-current current xa ivaliwe, benza i-terminals ye-arc xa ivuliwe.Zenziwe ngezinto ezahlukeneyo, kuxhomekeke kusetyenziso lwesiphazamisi sevacuum kunye noyilo lobomi obude bokunxibelelana, ukubuyiswa ngokukhawuleza kombane wokumelana nokulinganisa, kunye nolawulo lombane ogqithisileyo ngenxa yokunqunyulwa kwangoku.
Isiphazamisi se-vacuum sinezikhuselo ezijikeleze abafowunelwa kunye nasekupheleni kwesiphazamisi, ukuthintela nayiphi na into yokudibanisa ekhutshwe ngexesha le-arc ekugxininiseni ngaphakathi kwemvulophu ye-vacuum.Oku kuya kunciphisa amandla e-insulation emvulophu, ekugqibeleni kubangele ukugquma kwesiphazamisi xa ivuliwe.Ikhaka likwanceda ukulawula ubume bokusasazwa kwentsimi yombane ngaphakathi kwesiphazamisi, igalelo kumlinganiselo ophezulu wombane ovulekileyo wesekethe.Inceda ukufunxa amandla athile avelisiweyo kwi-arc, inyusa ukuphazamisa ukukala kwesixhobo.