avr SX460 is a half -wave phase-controlled thyristor type Automatic Voltage Regulator (AVR) INPUT Voltage jumper selectable 95-132V ac or 190-264V ac Frequency 50-60 Hz nominal OUTPUT Voltage max 90V dc at 207V ac input Current continuous 4 A dc intermittent 6A for 10 secs Resistance 15 ohms minimum Regulation +/- 1.0% (with 4% engine governing)