MX341 is a three phase sensed Automatic Voltage Regulator and the part of the excitation power is derived from a brush-less generator.
Technical specification
Input
     Voltage            140-220V ac max
     Frequency        100-120Hz nominal
     Current            3A/phase
Output
     Voltage            Max 120V dc
     Current            Continuous 2.7A
                           Intermittent 6A for 10 secs
     Regulation        +/-1.0%