Power Systems & Controls - Power Systems & Controls, Built in 1965, Power Systems & Controls has always been based in Richmond, VA. We continually have been designing, manufacturing and servicing power quality needs around the world. PS&C specializes in Frequency Conversion, Uninterruptible Power Supplies, Voltage Regulation, Power Conditioning, Electrical Isolation, Inverters, Power Factor Correction, Motor Generators Sets, Tactical Shelters and SCIFs.