I-ZW8- 12 Series VCB, iyimishini yangaphandle yokushintsha amandla kagesi aphezulu ene-voltage elinganiselwe engu-12KV, i-3-isigaba AC 50HZ. Ngokuyinhloko esetshenziselwa ukunqamula umthamo wamanje, ukulayisha ngokweqile kwamandla wamanje kanye nomjikelezo omfushane wegridi yamandla asemaphandleni, igridi yamandla asemadolobheni namandla amancane uhlelo. Isakhiwo siyisigaba esingu-3 ebhokisini elifanayo.Isiphazamisi se-vacuum yesigaba esi-3 sisebhokisini lensimbi, impahla evalekile eyamukelwayo. I-SMC njenge-insulation yesigaba ukuya kwesigaba kanye nokufakwa komhlaba. Inokusebenza okuthembekile, izinga le-insulating liphezulu kakhulu.
I-ZW8- 12G iyinhlanganisela ye-ZW8- 12 kanye neswishi ehlukanisayo, ebizwa ngokuthi inhlanganisela ye-circuit breaker, ingasetshenziswa njenge- nqamula amaswishi.
I-actuator yalo mkhiqizo iwuhlobo lwe-CT23, indlela yokushaja yasentwasahlobo, kungaba uhlobo lukagesi noma uhlobo lwemanyuwali.