| Attribute | Value |
|---|---|
| Device Name | R449 Alternator Voltage Regulator |
| Manufacturer | Leroy-Somer |
| Capacitor Brand 1 | Sic-safco |
| Capacitor Brand 2 | Sorec |
| Capacitor Brand 3 | Felsic 85 |
| Capacitance | 1 000 Μf -10+30% |
| Voltage/Temp Rating | 450vcc -55+85°c |
| Leakage Current | Leffa100hz 4.7 Aa85°c |
| Date Code/Batch | 0516 .ll. 265 |
| Internal P/N 1 | 744245 |
| Model Identifier | R449e |
| Internal P/N 2 | 054922921 |
| Frequency Rating | 50hz-60hz |
| Phase | 3ph. |
| Component Type | Pot 1w-470ω |
| Regulator Model | R 449 |
| Weight | 1.010 Kg |
| Reference Number(s) | 55952 |
What is the Leroy-Somer R449 Alternator Voltage Regulator?
The Leroy-Somer R449 is an advanced, high-performance AVR designed for use with Leroy-Somer alternators. It provides a stabilized output voltage through control of the excitation current in relation to changes in load.
Whether used in backup power systems, industrial machinery, marine vessels, or generator sets, this AVR ensures constant voltage levels even under heavy fluctuations in loads.
The R449 is especially suitable for generators requiring precise regulation, high reliability, and optimized voltage stability in harsh environments.
How the R449 Voltage Regulator Works
The R449 monitors the alternator’s output voltage and adjusts excitation to maintain consistent power delivery. It does so by:
- Real-time voltage measurement
- Feedback control loops
- Exciter field current adjustments
- Protection circuits to avoid overload or instability
This ensures that the alternator maintains a steady and smooth voltage regardless of load changes, temperature variations, or system disturbances.
Key Features of the Leroy-Somer R449 AVR
1. High-Precision Voltage Regulation
It provides excellent accuracy for output voltage stabilization, exhibiting very consistent performance against sudden changes in the load.
2. Modular and rugged design
The R449 features a compact, industrial-grade build that is suitable for demanding applications.
3. Over-Excitation Protection
Protects both the alternator and the electrical system from excess excitation current.
4. Adaptability of Load
Performs efficiently in dynamic load conditions such as motor starting, welding, compressors, and industrial machinery.
5. Dual Excitation Systems
Designed to function with both shunt and PMG-type excitations.
6. Adjustable Voltage Settings
Allows users and technicians to fine-tune parameters based on system requirements.
7. Integrated Soft Start
It reduces mechanical and electrical stress at generator startup.
Applications of the Leroy-Somer R449 AVR
1. Industrial Generators
Ensures reliable power for factories, refineries, and manufacturing units.
2. Marine Alternators
Operates effectively in severe marine conditions and on-board electrical systems.
3. Commercial Buildings & Backup Power Systems
Ideal applications: UPS systems, HVAC loads, lifts, and emergency power.
4. Construction and Mining Equipment
Supports generator systems used in either temporary or remote sites.
5. Renewable Energy & Hybrid Systems
Maintains voltage in wind-driven or hybrid generator applications.
6. Data Centers and Hospitals
Provides stable voltage where power quality is mission-critical.
Why Choose the Leroy-Somer R449 Voltage Regulator?
Unmatched Reliability
Designed to operate smoothly even under the harshest industrial or marine conditions.
Stable and precise power output
Maintains voltage stability for sensitive equipment and heavy-duty machinery.
Easy Maintenance and Configuration
In addition, technicians love the fact that it features a more user-friendly design and is very serviceable.
Compatibility with numerous alternator models
Offers flexible integration with various Leroy-Somer systems.
Long lifespan and strong safety features.
Built with high-quality components for durability and system protection.
