Overview
The GAVR-15A is an Automatic Voltage Regulator (AVR) that maintains the generator output voltage within precise limits by controlling the exciter field current. It continuously samples the generator output voltage and adjusts excitation to compensate for load changes, engine speed variations, and temperature drift.
Key Features
- Half-Wave Thyristor Control — Reliable excitation for brushless generators
- Wide Voltage Sensing — Compatible with 220/380/440VAC configurations
- Under-Frequency Protection — Automatic voltage reduction at low RPM
- Compact Industrial Design — Durable construction for generator control panels
Technical Specifications
| Parameter | Value |
|---|---|
| Model | GAVR-15A |
| Sensing Input | 160-260VAC 1-phase |
| Output Voltage | Max 90VDC@240VAC input |
| Output Current | Continuous 15A |
| Regulation Accuracy | <±1% |
| Frequency | 50/60 Hz |
| Excitation Type | Half-wave phase-controlled thyristor |
| UF Protection | Yes |
Compatibility
Universal brushless generators.
Why Choose ZenixPower
- Tight Voltage Regulation — <±1% RMS regulation ensures stable generator output under 0-100% load transients
- Fast Response — Sub-0.5 second recovery time prevents voltage dips during motor starting and load switching
- Dual Excitation Compatibility — Self-excited shunt or PMG-powered configurations clearly labeled for correct selection
- Built-in Protections — Under-frequency roll-off, over-excitation limiting, and soft-start ramp as standard
- Drop-In Replacement — Terminal layout and mounting dimensions match STAMFORD, Leroy-Somer, Marathon, and Mecc Alte OEM AVRs
- Pre-Calibrated — Each AVR ships with factory-default potentiometer settings for immediate plug-and-play operation
Specification Comparison
Compatible Generators 10-30kW brushless generators — the most widely used power range for the GAVR series.
Competitors Three models with progressive upgrades, plus the simplified AVR15A.
| Parameter | GAVR-15A | GAVR-15B | GAVR-15C | AVR15A |
| Output | 15A | 15A | 15A | 15A |
| Control | Half-wave thyristor | Half-wave SCR improved | Half-wave SCR enhanced | Standard |
| Low-Speed Protection | No | No | Yes | No |
| EMI Filtering | Basic | Enhanced | Enhanced | Basic |
| Regulation | ±1% | ±1% | ±1% | ±1% |
| Price | $15-25 | $18-28 | $20-30 | $10-18 |
Selection Advice
The GAVR-15C is widely regarded as the highest-quality model in the domestic GAVR series. Compared to the 15A, it adds low-speed protection (automatically reduces voltage when generator RPM drops too low to prevent equipment damage) and enhanced EMI filtering for only $5 more. The GAVR-15B is the mid-range option. The AVR15A is a simplified version with no protection features and no filtering — only suitable for minimum-budget scenarios.
