Iwo AC voltage transformers anoiswa kune gasi- insulated bhokisi-mhando switch ine yakatarwa frequency ye50Hz uye yakayerwa voltage ye10kV.Inogona kuburitsa yakakwirira-chaiyo zero sequence voltage masaini anoshandiswa nekuyera uye kutonga zvishandiso.Ichi chigadzirwa chinoona kubatanidzwa kwekutanga uye kwechipiri neZW68 switch body, FTU pamwe nemimwe michina, uye ine zvimiro zvehukuru diki, huremu, kuita kwakanakisa, kushanda kwakavimbika, kuisirwa nyore uye zvichingodaro.