An Automatic Voltage Regulator (AVR) is a device used in generators to automatically regulate voltage, which means that it will turn fluctuating voltage levels into constant voltage levels. The AVR is an electronic device that maintains a constant voltage level to electrical equipment on the same load. It is a solid-state electronic device that facilitates the automatic maintenance of generator output terminal voltage at a preset value, especially when there is a change in the generator load or the operating temperature of the generator undergoes a shift. The AVR works by sensing the voltage from the generator terminals and comparing it to the preset stable reference value to check for the error signal, if any. In case of a discrepancy between the two, the AVR adjusts the field current by increasing or decreasing the current flow to an exciter stator, which ensures a lower or higher voltage, respectively, at the main stator terminals. The AVR is an integral part of the alternators excitation system and is designed to build the voltage at starting and stabilize it at a preset level during the generators operation. The automatic voltage regulator (AVR) is closely related to the performance and durability of the generator, as it ensures that the voltage output delivered will be consistent in its load current even if fluctuations were to occur in the background.