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AVR - Automatic Voltage Regulator M25FA600A

AVR - Automatic Voltage Regulator M25FA600A

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El AVR M25FA600A es un regulador de voltaje diseñado específicamente para grupos electrógenos Marelli, garantizando una estabilidad excepcional. Ofrece un amplio rango de sensado de voltaje (170-270 V CA y 350-480 V CA), con una regulación de voltaje precisa de +/- 1%. Su tensión de salida es de 30 V y destaca por un rápido tiempo de respuesta de 1 ciclo. Trabaja con una corriente de 8 A y soporta una corriente de sobrecarga de 15 A durante 10 segundos. Además, opera eficientemente en un rango de temperatura de -20 a +60°C e incluye capacidad para funcionamiento en paralelo, ideal para optimizar el rendimiento de tu grupo electrógeno.

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AVR - M25FA600A is the automatic voltage regulator of the generator: it reads the output voltage and corrects the field excitation so the voltage stays stable as the load changes.

A failing AVR shows up before it dies: voltage dips 5–30 V when a large motor starts, lights flicker, or the control panel reboots. When it fails completely the set delivers only residual voltage or trips on overvoltage.

Specifications and compatibility

Applicable to
MARELLI MOTORI
Dimensions
22 x 6,5 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 MARELLI MOTORI
Weight 2,00 kg
Dimensions 22 x 6,5 x 13 cm
Spare Parts
Generator Parts AVR