"automatic voltage regulator AVR SX460 is a half-wave phase-controlled thyristor type Automatic Voltage Regulator(AVR) and forms part of the excitation system for a brushless alternator, such as Stamford or stamford technical alternator." 
Technical specification 
Input 
        Voltage       jumper selectable 95-132V ac or 190-264V ac 
        Frequency   50~60Hz nominal 
Output 
        Voltage       Max 90VDC at 207VAC input 
        Current        Continuous 4ADC 
                           Intermittent 6A for 10 secs 
        Resistance   15 ohms minimum 
        Regulation      +/- 1.0% 

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   
"Fast delivery good service with high quantity and competitive price,offer high discounts on volume orders as well"