Overview
The GAVR-8A 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
- ±1% Regulation — Precise voltage control
- Programmable Input — 110/220/440VAC selectable
- Soft Start Ramping — Smooth generator startup
- Under-Frequency Protection — Automatic voltage reduction
- Rugged Compact Design — Industrial durability in small form factor
Technical Specifications
| Parameter | Value |
|---|---|
| Model | GAVR-8A |
| Sensing Input | 160-260VAC 1-phase |
| Output Voltage | Max 90VDC@240VAC input |
| Output Current | Continuous 8A |
| Regulation Accuracy | <±1% |
| Frequency | 50/60 Hz |
| Excitation Type | Self-excited shunt |
| Soft Start | 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 3-15kW small brushless diesel/gasoline generators.
Competitors GAVR-10A (higher current), AVR8A (simplified version).
| Parameter | GAVR-8A | GAVR-10A | AVR8A |
| Output Current | 8A | 10A | 8A |
| Voltage Sensing | 110/220/440V programmable | Same as 8A | Fixed single voltage |
| Soft Start | Yes | Yes | No |
| UF Protection | Yes | Yes | No |
| Regulation | ±1% | ±1% | ±1% |
| Price | $10-18 | $12-20 | $8-15 |
Selection Advice
The GAVR-8A is the standard choice for 3-15kW small generators. 110/220/440V triple voltage programmability means worldwide compatibility. If the generator power approaches the 15kW upper limit, the GAVR-10A (10A provides more headroom) is recommended. The AVR8A is the most simplified version, missing several protection features but $2-5 cheaper — suitable for one-time low-cost replacement.
