AVR - Automatic Voltage Regulator R120
El AVR R120 es un regulador de voltaje de alta precisión con regulación de ±1% y un rápido tiempo de respuesta de menos de 50 milisegundos. Soporta entradas de detección monofásicas (277 V CA ±10%) y trifásicas (415 V CA ±10%) con detección de 2 líneas, y su potencia de entrada es de 277 V CA RMS a 50/60 Hz. Ofrece una salida de 95 V CC a 240 V CA con 4 A CC continuos (y 6 A por 30 segundos), permitiendo un ajuste de voltaje de ±10%. Diseñado para operar entre -20 °C y +70 °C, incluye ajuste de estabilidad, compensación por baja frecuencia (por debajo de 46/56 Hz), un bajo cebado de tensión de 2 voltios y una baja deriva térmica de ±1% por cada 30 °C.
AVR - R120 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 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 | LEROY SEMER |
| Weight | 1,00 kg |
| Dimensions | 17 x 6 x 13 cm |
| Spare Parts | |
|---|---|
| Generator Parts | AVR |