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Leroy Somer R250 analog automatic voltage regulator (AVR) for small alternators with SHUNT excitation. Voltage regulation +/-0.5%, U/F and LAM functions, quick response.
Leroy Somer R438 analog automatic voltage regulator (AVR) for alternators with AREP or PMG excitation. Voltage regulation +/-0.5%, U/F and LAM functions, 500 ms response.
Leroy Somer R449 analog automatic voltage regulator (AVR) for LSA series industrial alternators, providing excitation current up to 7 A for SHUNT, PMG or AREP excitation types.