Automatic Voltage Stabilizer

Voltage Regulating Transformer is a Power device that is used to provide variable voltage for the purpose of variation, stabilization without phase shift or deterioration of the supply wave form and power factor. Voltage Regulator Transformer or Regulator as commonly known, is a variable ratio Transformer. Variation in the voltage is achieved by the movement of carbon roller contacts over a column of turns where a strip of insulation has been removed to allow the contacts to run on the conducting material of the transformer coil. This arrangement allows continuous variation across the range of voltage present on the coil turns. The Regulator coils are fully compensated. Compensation is a method whereby the naturally high reactance of long coils is limited to a low value across the range of variation. Limiting the reactance tends to produce a linear variation in the output voltage of the regulator, across the range of operation.