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The AVR R450 regulator is a half-wave phase-controlled thyristor automatic voltage regulator designed for brushless generator excitation systems. Engineered as a direct replacement for OEM voltage regulators on Leroy-Somer LSA423 and LSA502 generator series, the AVR R450 regulator delivers voltage regulation within plus or minus 1% under normal load conditions. The AVR R450 regulator accepts three-phase sensing inputs from 95 to 480VAC and power inputs from 40 to 150VAC, covering both low- and high-voltage generator platforms. A jumper-selectable frequency setting allows the AVR R450 regulator to serve both 50Hz and 60Hz power systems without hardware changes. With maximum 160VDC output at 120VAC input and 10A excitation capacity, the AVR R450 regulator is the standard service choice for LSA423 and LSA502 generator maintenance.
The AVR R450 regulator circuit continuously monitors generator terminal voltage through its three-phase sensing input and adjusts excitation current to hold the preset voltage level. When generator load increases and output voltage drops, the AVR R450 regulator raises excitation current to restore the target set point. When voltage rises above the set point, the AVR R450 regulator reduces excitation automatically. This closed-loop control method gives the AVR R450 regulator a fast correction response that reduces the amplitude of transient voltage deviation during sudden load changes. Service technicians choose the AVR R450 regulator for its predictable correction behavior and straightforward installation process in both new and replacement applications.
The AVR R450 regulator PCB integrates into standard generator control panels with clearly labeled input and output terminals. The AVR R450 regulator includes accessible trimmers for both stability adjustment and voltage-level setting, allowing a qualified technician to configure the AVR R450 regulator on-site without specialized tools.
| Parameter | Value |
|---|---|
| Product Name | Generator AVR R450 for model Lsa423 Lsa502 |
| Sensing/Power input Voltage | 95-480VAC, 40-150VAC, 3 phase |
| Sensing/Power input Frequency | 50/60 Hz jumper selectable |
| Output Voltage | Max 160VDC at 120VAC input |
| Output Current | Max 10A |
| Voltage Regulation | < +/-1% (with 4% engine governing) |
The AVR R450 regulator thyristor-based control circuit responds to voltage deviations within milliseconds, a reaction speed far exceeding older electromechanical voltage regulators. This fast response allows the AVR R450 regulator to reduce the amplitude of voltage transients during sudden load changes, keeping equipment connected to the generator within safe operating voltage limits. The AVR R450 regulator rapid correction characteristic is particularly valuable in applications where electrical loads switch on and off frequently, such as motor starting circuits or variable duty-cycle industrial equipment.
The AVR R450 regulator wide sensing input range addresses a common compatibility challenge when deploying voltage regulators across generator fleets with different nominal output voltages. Whether a site uses 220V or 380V generator output, the AVR R450 regulator sensing circuit accommodates both configurations without hardware changes, making it a practical single-model solution for service organizations. POPULACE manufactures the AVR R450 regulator using high-temperature-rated thyristor components, and conformal coating on key PCB areas extends the AVR R450 regulator service life in humid and dust-exposed generator installation environments.
Sourcing the AVR R450 regulator from POPULACE gives distributors and service providers an OEM-equivalent replacement solution at a competitive supply price. The AVR R450 regulator covers multiple Leroy-Somer generator models with a single SKU, reducing inventory overhead while expanding serviceable platform coverage.
The AVR R450 regulator is packaged for safe international shipping, supporting importers and regional distributors who supply generator service markets across different countries and continents. POPULACE provides technical documentation for the AVR R450 regulator, including installation guides and parameter specification sheets, giving buyers the resources needed to support their own clients effectively at the field level. The AVR R450 regulator consistent output quality and traceable batch production records support quality management requirements at every level of the supply chain, from importer to end-user service organization.
Q: Which generator models is the AVR R450 regulator compatible with?
A: The AVR R450 regulator is designed as a direct replacement for OEM automatic voltage regulators on Leroy-Somer LSA423 and LSA502 brushless generator series.
Q: How is the operating frequency selected on the AVR R450 regulator?
A: The AVR R450 regulator uses a jumper selector to switch between 50Hz and 60Hz operation. Changing the setting on the AVR R450 regulator takes only a few minutes and requires no specialized tools, making the AVR R450 regulator easy to configure for different regional power grid standards before installation.
Q: What voltage regulation accuracy does the AVR R450 regulator provide?
A: The AVR R450 regulator maintains output voltage within plus or minus 1% when the engine governor holds speed within plus or minus 4%, making the AVR R450 regulator suitable for sensitive commercial and industrial generator loads.
Q: Can the AVR R450 regulator work with different generator output voltages?
A: Yes. The AVR R450 regulator accepts sensing input from 95 to 480VAC and power input from 40 to 150VAC, covering the common generator nominal output voltages used across international markets. The AVR R450 regulator input voltage flexibility means one model serves generator platforms across different regional electrical standards without a hardware change.
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