O le AC eletise eletise transformers o loʻo faʻaogaina i kesi-insulated pusa-ituaiga ki ma faʻamauina taimi o le 50Hz ma le fuaina voltage o le 10kV.E mafai ona fa'aulufaleina le fuaina o le voltage fa'asologa maualuga ma fa'ailo fa'asologa ole fua fa'asologa e fa'aaogaina e fua ma fa'atonutonu masini.O lenei oloa e iloa ai le tuʻufaʻatasia muamua ma le lua faʻatasi ma tino fesuiaʻi e aofia ai le iunite autu mama (RMU) ma le ZW20, ma isi meafaigaluega e pei o le FTU faʻapea foʻi ma le DTU, faʻatasi ai ma foliga o le laʻititi laʻititi, mama mamafa, faʻatinoga lelei, faʻatuatuaina galuega, faigofie faʻapipiʻi ma faapena. luga.