SX460 is a half-wave phase-controlled thyristor type automatic voltage (AVR) and froms part of the excitation system for a bruch-less generator.Postive voltage build up from residual leves is ensured by the use of efficient semiconductors in the power circuitry of the AVR.Specifications:Voltage: 220V AC Jumper selectable Phase: 1OUTPUTCurrent: continuous 4 A DCRegulation: ±1.0%AVR response: 20msMachine volts to 97%: 300ms