VTI - series thyristor exciter are designed to supply power to excitation coil and control of excitation current of synchronous electric motors of STDM, STD, SDK, SDKP, DSK series. VTI-630/150T thyristor exciter is designed to supply power to exciting coils and to control excitation current of SDG 2-12500-2O motor. Exciters are supplied for domestic use and for export with above mentioned motors and upon confirmation with manufacturer of exciters to perform excitement of similar electric motors.