I-TNSUchungechunge lwezigaba ezintathu zokulawula i-voltage ezenzakalelayo eqondile kakhulu luhlanganiswe ne-TND(SVC) single phase high precisiora automatic voltage regulator, Izigaba ezintathu zilungiswa ngazinye ukuqinisekisa i-voltage ephephile eqinile esigabeni ngasinye, Amandla angenayo enethiwekhi ayizigaba ezintathu uhlelo lwezintambo ezine, uxhumano olufana nenkanyezi (Y), amandla okukhipha angenziwa ngezigaba ezintathu izintambo ezine izigaba ezintathu izintambo ezintathu, amamitha amathathu e-ampere abonisa amandla okukhipha ngesigaba ngasinye, okuvimbela i-volage yangaphandle yesigaba ngasinye nge-aswitch kanye nokushintsha kwemitha ye-voltage.