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AVR - Automatic Voltage Regulator R449

AVR - Automatic Voltage Regulator R449

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El AVR R449 es un regulador de voltaje analógico diseñado para alternadores con sistemas de excitación AREP o PMG. Su función principal es controlar la corriente de excitación para mantener la estabilidad del voltaje de salida del alternador. El R449 se destaca por su regulación de voltaje eficiente, siendo sencillo de configurar y usar, además de muy confiable. Puede operar tanto con la función LAM (U/f) como sin ella, seleccionable mediante el strap ST5, y cumple con los estándares I.E.C. 60034-1 y U.L. 508 / C.S.A..

$ 142.96 142.96 USD Tax Excluded

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  • Generator Parts
  • Applicable To
  • Weight
  • Dimensions

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AVR - R449 belongs to the generator excitation circuit and holds the output voltage within about ±1 % when the load steps up or down.

AVR wear is thermal. It works inside the generator compartment with no ventilation of its own, so it is usually the first module to age on a high-hour set. Keeping one on the shelf avoids a multi-day stop for a low-cost part.

Specifications and compatibility

Applicable to
LEROY SEMER
Dimensions
17 x 9,5 x 13 cm
Weight
2.00 kg

How to verify before ordering

  • Check that the reference printed on the AVR label (for example AS440, MX341, R120) matches exactly; variants differ in sensing range and excitation level.
  • Confirm the excitation input voltage and the generator type it serves. They are not interchangeable across generator makes or speed ranges.
  • Inspect wiring and brushes before replacing the module: a loose connection produces exactly the same symptoms as a burnt AVR.

Frequently asked questions

How do I know the fault is the AVR and not the generator?

Measure output voltage at steady load. If it is low and does not respond to the excitation trim, while windings and rotating diodes are healthy, the AVR is the suspect. A cross-test with a spare AVR confirms it in minutes.

Can the voltage be trimmed after installation?

Yes. Most of these regulators have a voltage and a stability trim pot. Set them at no load to the site nominal voltage, then verify under load before signing off.

Related parts

See the spare parts catalogue or request a quotation quoting the equipment reference. Third-party trademarks are cited for identification purposes only.

Specifications

Characteristics
Applicable To LEROY SEMER
Weight 2,00 kg
Dimensions 17 x 9,5 x 13 cm
Spare Parts
Generator Parts AVR