TNSUluhlu lwezigaba ezithathu oluchanekileyo oluchanekileyo oluzenzekelayo lwe-voltage regulator ludityaniswe ne-TND (SVC) isigaba esisodwa esiphezulu se-precisiorautomatic voltage regulator, izigaba ezithathu zilungelelanisa ngamnye ukuze ziqinisekise umbane okhuselekileyo okhuselekileyo kwisigaba ngasinye, Uthungelwano lwamandla angenayo luzizigaba ezithathu zenkqubo yeengcingo, njengenkwenkwezi (Y) uqhagamshelwano, umbane ophumayo unokwenziwa kwizigaba ezithathu iingcingo ezine i-oithreth izigaba zangoku, i-oithreth ye-ameth yangoku, i-oithreth iimitha zangoku ukunciphisa ukuphuma kwesantya sesigaba ngasinye nge-aswitch kunye nokutshintsha kwemitha yombane.