These servo voltage regulators are designed to give stabilised outputs within 1 percent of the nominal value these are available in 2 types viz balanced load and unbalanced load regulators the balanced load type circuit detects voltage variation in single phase and moves the motor such that 3-phase output is in the specified limit the output waveform is completely distortion-free and regulation unaffected by power factor fast rate of connection up to 70 v per second line-to-line [25 v/second for 100 kva and above] efficiency of 96 percent using high grade laminations and isi grade 99.9 percent purity copper wires plug in type glass-epoxy control cards for easy serviceability and visual warning against extreme high or low input voltages
