640 Power Factor Regulator from Time Mark
The Model 640 Power Factor Regulator is a monitoring and control factor correction system. It was designed to help obtain an improved power factor, with a minimum of added capacitors. This device uses a unique phase-angle sensing circuit to monitor the power factor of a 3-phase power line. The Model 640 automatically responds to changing power factor by closing or opening the internal relays, which add or subtract capacitor banks on the line.
Time Mark Corporation