AVR 20a Automatic Voltage Regulator Gavr-20A For Generator is a half-wave phase controlled thyristor type Automatic Voltage Regulator and forms part of the excitation system for a brushless generatorAVR 20a Automatic Voltage Regulator Gavr-20A For Generator is a half-wave phase controlled thyristor type Automatic Voltage Regulator and forms part of the excitation system for a brushless generator.
