SX460 is a half-wave phase-controlled thyristor type AVR and forms part of excitation system for a brushless alternator. ... a half-wave phase-controlled thyristor type Automatic Voltage Regulator(AVR) and forms part of the excitation system for a brushless ... , MX321, SR7, UVR6, SE350, M16FA655A, M40FA640A/A, VR6/K65-12B. AVR SX460