Voltage regulator is a device that maintains the terminal voltage of a generator or other voltage source within required limits despite variations in input voltage or load. This is also known as automatic voltage regulator. These are used wherever the unregulated voltage would vary more than can be tolerated by the electrical equipment using that voltage. The alternating-current distribution feeders use regulators to keep the voltage supplied to the user within a prescribed range. The electronic equipment often has voltage regulators in dc power supplies. Voltage variations must be minimized for the efficient operation of industrial equipment and for the satisfactory functioning of domestic appliances, television in particular.
Voltage stabilizer is an electronic device able to deliver relatively constant output voltage when input voltage and load current changes over time. The output voltage is usually regulated using a transistor. In a parallel stabilizer, the transistor is connected parallel to the stabilizer load consuming the excess of power.
Voltage Surge protection resistor is provided for a DC power supply. The rectified AC line voltage of the resistor is filtered in an LC filter having a shunt-connected filter capacitor. This is done by inserting a limiting resistor in series with the filter capacitor during power-up to reduce the inrush current and the voltage overshoot to acceptable values. Once the power-up period is over and D-C power is fed to a load, the limiting resistor is bypassed. Electronic systems can be damaged or disturbed by surges. Voltage surge protection are much greater than the normal working voltage and which appear in a system such as LAN for a short period time and hence are also referred to as less transient over voltage.
Voltage Transducers are designed to measure AC voltage in single and 3 phase systems. They convert the A.C. signal to a D.C. output that is directly proportional to the input signal. Voltage transducers accepts direct AC voltage inputs upto 500V AC and provide proportional dc single or dual output.