The AVR R438 is a reliable Automatic Voltage Regulator (AVR) designed to control and stabilize the output voltage of generator alternators. It adjusts the exciter field current to maintain steady voltage levels even under varying load conditions — ensuring your generator delivers clean, stable power. This regulator is commonly used in Leroy Somer alternators and compatible generator systems with AREP or PMG excitation.
Where It Is Used
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Installed in diesel and brushless generators with PMG or AREP excitation systems
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Compatible with alternators like Leroy Somer LSA series used in industrial gensets
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Suitable for standby, prime‑power and heavy‑load applications
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Ideal for commercial, construction and industrial power generation setups where voltage stability is critical
Key Functions & Features
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Automatic voltage regulation: Maintains output voltage within tight tolerances (±0.5 to ±1.0 %) despite load changes, protecting appliances and equipment from voltage spikes and drops.
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Compatible with AREP & PMG systems: Works with both standard auxiliary winding and permanent magnet generator excitation types.
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Stable performance: Regulates generator output under varying load and environmental conditions.
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Electronic protection: Built‑in safeguards against overloads and short circuits for durability.
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Easy installation: Designed as a direct replacement for OEM R438 modules in many gensets.
Order your AVR R438 Automatic Voltage Regulator at www.rixingcompany.com — your trusted source for generator spare parts and power solutions in Kenya.
