AVR - Automatic Voltage Regulator R448
El AVR R448 es un regulador de voltaje compatible para generadores sin escobillas Leroy Somer de 50-300KW, apto para alternadores de las series 5000, 6000 y 7000, y se puede alimentar mediante sistemas de excitación PMG, AREP o de derivación. Este AVR, que también reemplaza a modelos como Leroy Somer R449, R438 y AEM110RE016, así como Olympian FG Wilson 922-124, ofrece una regulación de voltaje de <±0.5% con ajuste del motor al 4%. Sus rangos de detección de voltaje son de 95-140V, 170-260V y 340-520V (seleccionable 50/60Hz), con una entrada de energía trifásica de 40-150V CA. La salida de voltaje máxima es de 160 V CC a 120 V CA, con una corriente máxima de 10 A y una caída de corriente máxima del 4% a PF 0.8. Cuenta con arranque de voltaje residual (>5 V CA), ajuste de voltaje externo de ±10%, bobinado auxiliar de 6-150V CA, un tiempo de respuesta de 0.3-1 seg., y una tasa de caída de voltaje LAM seleccionable del 10% o 15%. Diseñado para operar en un amplio rango de temperaturas de -40°C a 60°C, es robusto y cuenta con controles de ajuste para voltaje, estabilidad, UFRO, límite de corriente de excitación y ajuste de caída.
AVR - R448 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
- 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 |