GENERAL
The M71FA300 is a digital automatic voltage regulator made by Marelli in Italy. Special add-on for 160-900 frames. This regulator senses 3 phases and adjusts excitation when needed. PMG and Auxiliary windings is needed to power the AVR.
APPLICATIONS
CORRESPONDING, ASSOCIATED & OBSOLETE PART NUMBERS
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Perhaps one of the most commonly used AVR’s in the Stamford line. Known by many techs, electricians, engineers and end users, the SX460 voltage regulator is a superior regulator with easy to use settings and very low price. It’s ability to regulate voltage is essential with today’s power demand.
The MX321-2 automatic voltage regulator is used on larger Stamford generator alternator ends. These units are installed as a standard from factory on alternator ends HC6 and P7 stamford frames. This regulator allows 3 phase sensing which is constantly sensing the voltages across all 3 lines vs just 2 lines like on other standard AVRs. As an added benefit the regulator enables quadrature droop input, this enables the chance for multiple synchronizing across many generator sets.
