AVR MX321 is a three phase sensed Automatic Voltage Regulator and the forms part of
the excitation power is derived from a brush-less generator.
Technical specification

Input
        Voltage       170~220V AC max
        Frequency   100~120Hz nominal
          Current       3A/phase
Output
        Voltage       Max 120VDC
        Current        Continuous 3.7A
                           Intermittent 6A for 10 secs
       Resistance    15 ohms minimum
       Regulation      +/- 0.5%RMS with 4% engine governing

3.We mainly supply the following  AVR:
General AVR Series Replacement:
GAVR-15A GAVR-12A GAVR-8A

Stamford Series AVR Replacement:
SX440 AS440 SX460 MX321 MX341

Leroy somer Series Replacement:
R448 R449 R230 R438

Marathon AVR Replacement:SE350   
"we supply:fast delivery ,good service with high quantity and competitive price.high discounts on volume orders as well."