... ,MX321,MX341, R448,R449,R230,YH-8A,YH-12A,etc. Voltage Stabilizer SX440 is a half-wave phase-controlled thyristor type Automatic ... Voltage Regulator(AVR) and forms part of the excitation system for ... msFiled current to 90%80 msMachine volts to 97%300msExternal voltage adjustment+/- 10% with 1 k ohm 1 watt trimmer(see ...