Isiphazamisi se-vacuum sokuthekelisa i-TD-25.8/630-20 (186)

Imininingwane Yomkhiqizo

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Incazelo emfushane yomkhiqizo:

Isiphazamisi se-vacuum idivayisi kagesi evacuum esebenzisa i-vacuum ephezulu evala i-arc yokucima umlilo futhi ibona umsebenzi wokucisha wesekethe yamandla ngababili abathintwayo abavalwe ku-vacuum.Lapho inqamula inani elithile lamanje, ngesikhathi sokuhlukaniswa koxhumana nabo abashukumisayo nabaqinile, lamanje liyancipha kuze kube yilapho abathintwayo bavele bahlukane, okuholela ekwenyukeni okukhulu kokumelana phakathi kwama-electrode kanye nokwanda okusheshayo kwezinga lokushisa, kuze kube ukuhwamuka kwensimbi ye-electrode kwenzeka, futhi ngasikhathi sinye, kwakheka amandla enkambu kagesi aphezulu kakhulu, okuholela ekuphumeni okunamandla kakhulu kanye nokuqhekeka kwegebe, okuholela ku-vacuum arc.Lapho i-voltage yefrikhwensi yamandla isondele ku-zero, futhi ngesikhathi esifanayo, ngenxa yokwanda kwebanga lokuvula lokuxhumana, I-plasma ye-vacuum arc ihlakazeka ngokushesha nxazonke.Ngemuva kokuthi i-arc current idlule ku-zero, i-medium egebeni lokuxhumana ishintsha ngokushesha ukusuka ku-conductor ukuya ku-insulator, ngakho-ke i-current iyanqanyulwa.Ngenxa yesakhiwo esikhethekile sothintana naye, igebe lokuxhumana lizokhiqiza insimu yamagnetic longitudinal ngesikhathi se-arcing.Le nkundla kazibuthe ingenza i-arc isatshalaliswe ngokulinganayo endaweni yokuxhumana, igcine i-voltage ephansi ye-arc, futhi yenze igumbi lokucisha i-arc le-vacuum libe nesivinini sokuthola kabusha samandla e-post arc dielectric, okuholela emandleni amancane e-arc kanye nesilinganiso esincane sokugqwala.Ngale ndlela, umthamo wamanje ophazamisayo nempilo yesevisi yesiphazamisi se-vacuum iyathuthukiswa.
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 edlula ngokushesha.Kunoma ikuphi, i-oscillation yethulwa ohlelweni olungase lubangele ukugcwala okukhulu ngokweqile.
Kulezi zinsuku, ngokusika okuphansi kakhulu kwamanje, ama-vacuum circuit breaker ngeke abangele ukugcwala ngokweqile okungase kunciphise ukufakwa kwezinto ezisetshenziswayo ezizungezile.