AVR MX321 is a premium Automatic Voltage Regulator (AVR) designed to deliver stable and reliable voltage control for diesel and industrial generators. This high-performance regulator continuously senses generator output and adjusts excitation to maintain consistent voltage under varying electrical loads, protecting sensitive equipment and improving overall generator performance.
Where It Is Used
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Installed on gensets with Stamford/AvK alternators
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Heavy-duty diesel generators in industrial, commercial and backup power applications
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Larger power units requiring three-phase sensing and PMG excitation systems
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Suitable for use on Cummins, Onan, Hipower/Himoinsa and other branded generator systems equipped with MX321-compatible alternators
Key Functions & Features
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Automatic voltage regulation for stable AC output even under load changes
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Three-phase RMS sensing for precise voltage monitoring
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PMG (Permanent Magnet Generator) excitation support to isolate control circuitry from load disturbances
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Soft-start and under-frequency protection options improve generator reliability
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High regulation accuracy (typically ±0.5% with proper engine governing)
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