AVR - Automatic Voltage Regulator SE350
El AVR SE350 es un regulador de voltaje electrónico encapsulado, diseñado para alternadores Marathon y Stamford, que controla la salida de generadores de CA sin escobillas regulando la corriente del excitador. Se alimenta con una entrada de AC190-240V a 50/60Hz y ofrece una salida continua de 73 V CC a 3.5 A CC (255W), con una capacidad de forzado de 105 V CC a 5 A CC (525W) con entrada de 240 V CA. Su regulación es del 1.00% (o mejor al 1% según la tasa ajustada) y permite un ajuste remoto de voltaje de hasta +/-10% con un reóstato de 2000 ohmios o +/-5% con uno de 1000 ohmios. Además, incluye compensación de frecuencia ajustable con puntos de "roll-off" de 54-61Hz para 60Hz y 45-51Hz para 50Hz. Con un peso de 6.5 oz y unas dimensiones de 100x65x49mm, su disipación de potencia máxima es de 8 vatios, siendo un componente compacto y eficiente.
AVR - SE350 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
- MARATHON ELECTRIC
- Dimensions
- 17 x 6 x 13 cm
- Weight
- 1.00 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 | MARATHON ELECTRIC |
| Weight | 1,00 kg |
| Dimensions | 17 x 6 x 13 cm |
| Spare Parts | |
|---|---|
| Generator Parts | AVR |