LEROY SOMER AVR D550 ITEM: LEROY SOMER AVR D550 BRAND: NIDEC DATA: Excitation mode SHUNT, AREP, PMG Rated excitation current 7 A Regulation accuracy (+/- %) 0.25 % Frequency range 10 – 400 Hz Voltage setting range (+/- %) 30 % kU/F limitation 0.5 < k< 3