Three-phase AC voltage regulator supplies the power to computers, battery-operated devices, and other electrical equipment. The three-phase AC voltage regulator is also known as a three-phase regulator. There are two regulated outputs for the single-phase output. A one-way regulator is usually used to provide back up-regulation. In computer circuits, automatic voltage regulators help to supply the voltage from the power supply. It works with the regulated current in the signal flow to keep it steady. It is the circuit boards that help in regulating the electric current. They either supply it comes through the cables which may be cables attached to switches or circuit boards.