I-ZW8-12 Series VCB, sisixhobo sangaphandle sokutshintsha umbane ophezulu esine-voltage elinganisiweyo eyi-12KV, i-AC enezigaba ezi-3 ezingama-50HZ. Ngokuyintloko yi isetyenziselwa ukwaphula umsinga womthwalo, umsinga womthwalo ogqithisileyo kunye nomsinga wesekethe emfutshane kwigridi yombane yasemaphandleni, igridi yombane yasezidolophini kunye nombane omncinci inkqubo. Ulwakhiwo lunezigaba ezi-3 kwibhokisi enye. Isithinteli se-vacuum esinezigaba ezi-3 sikwibhokisi yesinyithi, samkelwe ngezinto ezigqunyiweyo I-SMC njenge-phase to phase insulation kunye ne-earth insulation. Isebenza ngokuthembekileyo, inqanaba lokukhusela liphezulu kakhulu.
I-ZW8-12G yindibaniselwano ye-ZW8-12 kunye neswitshi yokwahlulahlula, ebizwa ngokuba yi-combination circuit breaker, ingasetyenziswa njenge- ukucima iiswitshi.
Isixhobo sokutshaja esisetyenziswa kule mveliso siluhlobo lwe-CT23, indlela yokutshaja yentwasahlobo, ingaba lohlobo lombane okanye uhlobo lwesandla.