Automatic Voltage Regulator (AVR) The Automatic Voltage Regulator (AVR) regulates the excitation current to keep the generator’s voltage output in the required range. A complete inspection of the AVR system is required to ensure its safe and effective operation.  The inspection activities are described in detail below: 1). Safety Checks 2). Check the Auxiliary Power … Continue reading Automatic Voltage Regulator (AVR) Inspection Checklist