Overview
The GAVR-12A 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-12A |
| Sensing Input | 160-260VAC 1-phase |
| Output Voltage | Max 90VDC@240VAC input |
| Output Current | Continuous 12A |
| Regulation Accuracy | <±1% |
| Frequency | 50/60 Hz |
| Excitation Type | Self-excited shunt |
| 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 8-25kW brushless generators.
Competitors GAVR-12A vs GAVR-12B (enhanced) vs AVR12A (simplified).
| Parameter | GAVR-12A | GAVR-12B | AVR12A |
| Output | 12A | 12A | 12A |
| UF Protection | Yes | Yes | No |
| EMI Filtering | Basic | Enhanced | Basic |
| Price | $14-22 | $16-24 | $10-18 |
Selection Advice
The GAVR-12B costs $2-4 more than the 12A, but adds enhanced EMI filtering — voltage is more stable in environments with significant electromagnetic interference such as welding machines or VFD-driven equipment. For standard applications, the 12A is adequate. For interference-heavy environments, choose the 12B.
