Generator AVR 1)CE and ISO Certification 2)AVR: SX460,SX440, ... ,MX321,MX341, R448,R449,R230,YH-8A,YH-12A,etc. Generator AVR SX440 is a half-wave phase-controlled thyristor type ... Automatic Voltage Regulator(AVR) and forms part of the excitation system for a brushless alternator.Technical ...