AVR - Automatic Voltage Regulator STLF-3
El AVR STLF-3 es un regulador de voltaje diseñado para mantener una estabilidad de voltaje entre 95% y 105%, con una tasa de ajuste en estado estacionario inferior a ±1.5%. Su entrada de voltaje principal es de 380V, y ofrece una entrada de detección de 220V CA (personalizable) o 400V CA trifásica, a 50/60Hz.1 Proporciona un voltaje de excitación de 20-100V CC y una corriente de excitación controlable de 30-50A.2 La regulación de voltaje es de ±1.5% RMS (con 4% de control del motor) y permite un ajuste de voltaje externo de ±10% con un recortador de 2k ohm y 1 watt.3
AVR - STLF-3 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
- ESCOBILLA
- Dimensions
- 17 x 8,5 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 | Brush |
| Weight | 1,00 kg |
| Dimensions | 17 x 8,5 x 13 cm |
| Spare Parts | |
|---|---|
| Generator Parts | AVR |
