Isiphazamisi seVacuum yokuthumela ngaphandle TD-25.8/630-20 (186)

Isiphazamisi sevacuum sisixhobo sokufunxa sombane esisebenzisa ivacuum ephezulu ekhuselayo yokucima i-arc kwaye siqonde umsebenzi wokucima wesekethe yamandla ngabafowunelwa ababini abatywinwe kwivacuum.Xa uqhawula umlinganiselo othile wangoku, ngexesha lokwahlulwa koqhagamshelwano oluguquguqukayo kunye noluzinzileyo, lwangoku luyancipha ukuya kwindawo apho abafowunelwa bahlukana nje, okukhokelela ekunyukeni okubukhali kokuchasana phakathi kwee-electrodes kunye nokunyuka ngokukhawuleza kweqondo lokushisa, de Ukukhutshwa kwesinyithi se-electrode evaporation kwenzeka, kwaye kwangaxeshanye, ukuqina kombane okuphezulu kakhulu kuyenziwa, okukhokelela ekuphumeni okunamandla kakhulu kunye nokuqhekeka kwe-gap, okukhokelela kwi-vacuum arc.Xa i-voltage ye-frequency yamandla isondele kwi-zero, kwaye kwangaxeshanye, ngenxa yokunyuka komgama wokuvula uqhagamshelwano, iplasma ye-arc vacuum isasazeka ngokukhawuleza.Emva kokuba i-arc yangoku idlula i-zero, i-medium kwi-gap yoqhagamshelwano itshintsha ngokukhawuleza ukusuka kumqhubi ukuya kwi-insulator, ngoko ke i-current iyanqunyulwa.Ngenxa yesakhiwo esikhethekileyo soqhagamshelwano, i-gap yoqhagamshelwano iya kuvelisa intsimi yamagnetic longitudinal ngexesha le-arcing.Le ntsimi yamagnetic inokwenza i-arc isasazwe ngokulinganayo kwindawo yoqhagamshelwano, igcine i-arc voltage ephantsi, kwaye yenza igumbi lokucima i-arc ye-vacuum ibe nesantya esiphezulu sokubuyisela amandla e-arc dielectric, okukhokelela kumandla amancinci e-arc kunye nesantya esincinci sokubola.Ngale ndlela, ukuphazamisa amandla akhoyo kunye nobomi benkonzo yesiphazamisi sevacuum buyaphuculwa.
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 kunokuphinda kulayite i-arc, kubangele imisinga edlulayo ngequbuliso.Kuyo nayiphi na imeko, i-oscillation ingeniswa kwinkqubo enokuthi ibangele ukugqithisa okukhulu.
Kule mihla, ngokunqunyulwa okuphantsi kakhulu kwangoku, i-vacuum zesekethe zokuqhawula aziyi kubangela i-overvoltage enokunciphisa ukugquma kwizixhobo ezijikelezileyo.