Power AVR 1)CE and ISO Certification 2)AVR: SX460,SX440,AS440,MX321,MX341, R448,R449,R230,YH-8A,YH-12A,etc. Power 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 specificationinputvoltage190-264V acfrequency50-60 Hz nominalphase1wire2outputvoltageMax 90V dc at 207V ac ...