The AVR R220 is a high‑performance Automatic Voltage Regulator (AVR) designed to maintain stable electrical output from generator alternators by automatically controlling voltage levels. It’s ideal for ensuring reliable power and protecting sensitive equipment from voltage fluctuations.
Where It Is Used
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Generator alternators with SHUNT or AREP excitation systems
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Small to medium‑sized diesel generators (e.g., Leroy Somer LSA series and similar)
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Industrial backup power systems
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Applications requiring consistent voltage output under varying loads
Key Functions & Features
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Automatic voltage regulation keeps generator output within safe limits, preventing over/undervoltage damage.
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Voltage regulation accuracy ±0.5 % maintains stable power under load.
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Quick response time (≈500 ms) to voltage changes, enhancing performance reliability.
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Supports SHUNT and AREP excitation systems used in brushless alternators.
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Built‑in protection features, including fused power input, help safeguard the regulator.
✔ Used widely as a replacement or upgrade AVR in generator maintenance and repair.
✔ Helps extend alternator life and improve power quality.
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