SBW tolu vaega AC voltage stabilizer o se faʻafesoʻotaʻi fetuutuunai fetuutuunai otometi taui maualuga mana faatonutonu masini mana. A fesuia'i le voltage mai feso'ota'iga lagolago ona o le utaina o le taimi nei, e otometi lava le fa'atonutonuina o le voluma e fa'amautinoa ai le galuega masani a le eseese o masini eletise. O lenei faʻasologa oloa faʻatusatusa i isi ituaiga o voltage regulator, e tele lona gafatia, maualuga le lelei, leai se faʻalavelave faʻafefe, tulafono faatonutonu voltage ma isi mea lelei, e lagolagoina le tele o uta faʻaaogaina, tu i tafatafa o le mamafa vave ma faʻaauau galuega umi, tusi lesona / taʻavale, e mafai ona tuʻuina atu i luga ole voltage. leai se vaega. Fa'atonu vaega ma masini fa'aletonu e otometi lava ona puipuia. Fa'apipi'i lelei ma fa'atuatuaina fa'agaioiga (e mafai ona fa'aali numera/fa'aaliga fa'atusa)