R220 Leroy Somer AVR – Automatic Voltage Regulator

OverviewTheLEROY SOMER R220 AVR (Automatic Voltage Regulator)is a precision-engineered voltage regulation solution designed primarily for single-phase generator applications, though it can also be effectively installed in three-phase 12-wire generator configurations. This OEM replacement AVR ensures stable, consistent voltage output for your generator system, protecting sensitive electrical equipment from damaging voltage fluctuations and surges. The R220 utilizes shunt excitation technology and is specifically designed for compatibility with Leroy Somer's LSA40 and LSA42.3 alternator series, delivering reliable performance in industrial, commercial, and standby power applications. Whether you're maintaining critical backup power systems, operating construction equipment, or managing industrial generators, the R220 provides the voltage stability essential for safe, efficient operation.As a genuine Leroy Somer component, the R220 AVR represents decades of engineering excellence in generator voltage regulation technology. This automatic voltage regulator continuously monitors your generator's output voltage and makes real-time adjustments to maintain consistent power delivery regardless of load variations or engine speed fluctuations. The compact, robust design ensures long-term reliability even in challenging environmental conditions, while the shunt excitation configuration simplifies installation and maintenance procedures. For applications requiring AREP (Auxiliary winding with Rotating Exciter and Permanent magnet) or PMG (Permanent Magnet Generator) excitation systems, Leroy Somer offers alternative models such as the R450 and D510C, but for straightforward shunt-excited single-phase and select three-phase installations, the R220 remains the optimal choice for generator operators seeking dependable voltage regulation at an excellent value.Key SpecificationsSpecificationValueModel NumberR220ManufacturerLEROY SOMERExcitation TypeShunt OnlyPhase Application1 Phase