An ƙera makullin kaya mai matsayi huɗu mai cike da mai mai nauyin 12kV 630A don kabad ɗin canza zobe na akwatin Amurka wanda aka ƙera don cika ƙa'idodin IEEE, IEC da GB na duk buƙatun. Ana iya amfani da shi a tsarin ƙasa ko na ƙarƙashin ƙasa.

Makullin kaya mai matsayi huɗu da aka nutse a cikin mai a cikin shigarwa, kusa da tsakiyar transformer zai iya rage haɗin ciki Ƙarfin kebul, don haka rage madauki a cikin rawar ferromagnetic sosai. Duk haɗin gefe da saman suna samuwa ga na'urar transformer ta Amurka gabaɗaya ko na'urar transformer da aka binne.