Ukhuseleko olungundoqo kunye nezixhobo ezisebenzayo kwindawo yokusabalalisa amandla ombane ophakathi

I-12kV yangaphakathi ye-SF₆ iswitshi yomthwalo yinqanaba lesithathu le-AC high-voltage load switch kunye ne-voltage elinganisiweyo ye-12kV, ilungele ukufakwa kwangaphakathi. Isebenzisa i-SF₆ igesi njenge-insulating kunye ne-arc-extinguishing medium. Isetyenziselwa kakhulu ukuvula nokuvala umbane wangoku kwindlela yamandla, kunye nokuvala i-short-circuit current (ayikwazi ukuvula i-short-circuit current kwaye idinga ukudibaniswa ne-fuse ukufezekisa ukhuseleko olufutshane). Ngexesha elifanayo, inokufezekisa imisebenzi yodwa kunye nokumisa phantsi komgca, ukubonelela ngokukhuselekileyo kokugcinwa kwezixhobo zokusabalalisa.

Umgaqo ongundoqo wokusebenza kokutshintshaisekelwe kwiipropati ezigqwesileyo ze-SF₆ gas: I-SF₆ igesi inamandla amakhulu okugquma, ibe ngaphezu kwe-2.5 amaxesha omoya. Kwigumbi legesi elivaliweyo, liyakwazi ukwahlula ngokufanelekileyo iindawo eziphilileyo kwi-casing, ukukhusela ukwenzeka kweengozi zokuvuza. Ngethuba lenkqubo yokucima i-arc, xa utshintshi luvuliwe, oonxibelelwano oluhambayo kunye ne-static bahlukana, bevelisa i-arc. Igesi ye-SF₆ ishushu nge-arc kwaye idlula i-ionization, ithatha inani elikhulu lamandla e-arc. Ngexesha elifanayo, i-gas convection kunye nemiphumo yokupholisa isetyenziselwa ukucima ngokukhawuleza i-arc, ukuphepha ukutshiswa koqhagamshelwano okanye ukubangela ukusilela kwezixhobo. Uninzi lweemveliso zisebenzisa indlela esisigxina yokucima imagnethi ye-arc. Xa uvula iswitshi, i-arc iyajikeleza kwaye yolulwe kwibala lombane elenziwe yimagnethi esisigxina, iphucula ngakumbi ukusebenza kakuhle kokucima i-arc, iqinisekisa ukusebenza okuphantsi kombane, ukusebenza okuzinzile kokuvula, kunye nokufezekisa ukusebenza okugqwesileyo kokuvula umbane olinganiselweyo ngoku kuxinzelelo lwe-zero.

Isixhobo sihlala sidibanisa imisebenzi emithathu "yokuvalwa, ukuqhekeza, kunye nokumisa". Ngokusebenzisa i-interlocks yomatshini, ukulandelelana komsebenzi kulawulwa ngokungqongqo ukuqinisekisa ukuba "izixhobo azikwazi ukuvalwa ngaphandle kokumisa umhlaba, kwaye ukutshintshwa komthwalo awukwazi ukuvalwa kunye nokutshintshwa komhlaba kungachithwa". Oku kunqanda kakhulu iingozi zokhuseleko ezinokubakho ezibangelwa kukungasebenzi kakuhle kwaye kuqinisekisa ukhuseleko lwabasebenzi kunye nokusebenza kwezixhobo.