Inama y'abaminisitiri yo kwishyura ingufu za voltage nkeya ni ibikoresho byihariye by'amashanyarazi byagenewe gucunga ingufu zikora muri sisitemu y'amashanyarazi. Imbaraga zikora ni ngombwa mugukomeza urwego rwa voltage rukenewe mugukora neza ibikoresho by'amashanyarazi. Nyamara, imbaraga zirenze urugero zirashobora kuganisha kudakora neza, kongera ibiciro byingufu, no kwangirika kuri sisitemu y'amashanyara