Description----SX440 is a half –wave phase-controlled thyristor type Automatic Voltage Regulator (AVR) INPUT Voltage 190-264v ac Frequency 50-60Hz nominaf OUTPUT Voltage max 90v dc at 207v ac input Current continuous 4A dc Intermittent 6A for 10 secs Resistance 15 ohms minimum Regulation +/- 1%(With 4% engine governing)