AVR R448, 50/60Hz.110~600V. AVR-LS R48 Specially for Leroy Somer alternator/generator(C6/4-AREP excitation with AVR-R438 or AVR-R448), Technical specificationInput Voltage 70~140VAC, 3 phase (PMG)Induction detect 90~480VACOutput Voltage Max 125VDC Current Max 10A Protection Low speed, over excitation, LAMRegulation +/- 0.5% We also have R230, R438, R449.