Umkhiqizo
Isiphazamisi se-vacuum sokushintshwa kwekhefu lokulayisha (205A)
Incazelo emfushane yomkhiqizo:
Ngaphansi kwezimo ezithile, i-vacuum circuit breaker ingaphoqa i-current in circuit to zero ngaphambi kukaziro wemvelo (kanye nokuguqulwa kwamanje) kusekethi yamanje eshintshanayo.Uma isikhathi sokusebenza kwesiphazamisi singalungile ngokuphathelene ne-AC-voltage waveform (lapho i-arc icishiwe kodwa abathintwayo basanyakaza futhi i-ionization ingakashabalali kusiphazamisi), i-voltage ingase yeqe i-voltage ye-standard yegebe.Lokhu kungathungela kabusha i-arc, kubangele imisinga edlulayo engazelelwe.Kungenzeka ukunciphisa izinga lamanje lapho ukusika kwenzeka khona ngokukhetha into yokuxhumana ekhipha umhwamuko wensimbi owanele ukuvumela owamanje ukuba ufike enanini eliphansi kakhulu noma inani elinguziro. , kodwa lokhu akuvamile ukwenziwa njengoba kuthinta amandla e-dielectric kabi.
Kulezi zinsuku, ngokusika okuphansi kakhulu kwamanje, ama-vacuum circuit breaker ngeke abangele ukugcwala ngokweqile okungase kunciphise ukufakwa kwezinto ezisetshenziswayo ezizungezile.
Igumbi lokucisha i-vacuum arc, elaziwa nangokuthi i-vacuum switch tube, liyingxenye eyinhloko yokushintshwa kwamandla.Umsebenzi wayo oyinhloko ukwenza isifunda sicime ngokushesha i-arc futhi sicindezele amandla amanje ngemva kokunqamula ukunikezwa kwamandla ngokusebenzisa i-vacuum insulation enhle kakhulu ku-tube, ukuze kugwenywe izingozi nezingozi.
Oxhumana nabo baphatha i-circuit current uma ivaliwe, benze amatheminali e-arc uma evuliwe.Zenziwe ngezinto ezihlukahlukene, kuye ngokuthi isiphazamisi se-vacuum sisetshenziswa kanjani kanye nomklamo wempilo ende yokuxhumana, ukutholwa ngokushesha kwesilinganiso sokumelana nogesi, nokulawula ukugcwala ngokweqile ngenxa yokunqunywa kwamanje.
Isiphazamisi se-vacuum sinezivikelo ezizungeze abathintwayo nasekupheleni kwesiphazamisi, esivimbela noma iyiphi into yokuxhumana ehwamuke phakathi ne-arc ukuthi ingajikijeli ngaphakathi kwemvilophu yevacuum.Lokhu kuzonciphisa amandla okufaka imvilophu, ekugcineni kuphumele ekumiseni kwesiphazamisi uma ivuliwe.Isihlangu siphinde sisize ukulawula ukuma kokusatshalaliswa kwenkundla kagesi ngaphakathi kwesiphazamisi, okunikela esilinganisweni esiphezulu samandla kagesi wesekethe.Isiza ukumunca amandla athile akhiqizwa ku-arc, ikhulise isilinganiso esiphazamisayo sedivayisi.
