What is a Voltage Stabilizer?
It is an electrical appliance which is designed to supply a constant voltage to a load at its output terminals regardless of the changes in the input or incoming supply voltage. It protects the equipment or machine against over voltage, under voltage, and other voltage surges.

It is also called as automatic voltage regulator (AVR). Voltage stabilizers are preferred for costly and precious electrical equipment to protect them from harmful low/high voltage fluctuations. Some of these equipment are air conditioners, offset printing machines, laboratory equipment, industrial machines, and medical apparatus.

Voltage stabilizers regulate the fluctuating input voltage before it could be fed to the load (or equipment which is sensitive to voltage variations). The output voltage from the stabilizer will stay in the range of 220 Volt in case of single phase supply, within given fluctuating range of input voltage. This regulation is carried by buck and boost operations performed by internal circuitry.

There are huge varieties of automatic voltage regulators are available in today’s market. These can be single or three-phase units as required by the type of application and capacity (KVA) needed. These can be analog or digital type of stabilizer units.