Overview
The EA05A 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
- 5A Continuous Output — 90VDC max, 7A intermittent for 10 seconds
- ±0.5% Regulation — DIP switch programmable for 50/60Hz
- 220/380/440VAC Sensing — Three voltage ranges via DIP switch
- RoHS Compliant — Lead-free manufacturing process
- Compatible with Basler KR7, Airman DST-100-2, Markon 36245
- Internal EMI Filter — Reduces electromagnetic interference
- Compact Design — 107 x 75 x 48.5 mm, only 183g
Technical Specifications
| Parameter | Value |
|---|---|
| Sensing Input | 220/380/440VAC, 1-phase, 2-wire (DIP switch selectable) |
| Power Input | 100-300VAC, 1-phase, 2-wire |
| Output Voltage | Max 90VDC at 240VAC input |
| Output Current | Continuous 5A, Intermittent 7A for 10s |
| Regulation Accuracy | <±0.5% (with 4% engine governing) |
| Frequency | 50/60Hz (DIP switch selectable) |
| Excitation Type | Self-excited shunt, half-wave thyristor |
| UF Protection | 45Hz knee point (50Hz) / 55Hz (60Hz) |
| Min Field Resistance | 15 ohms |
| Max Field Resistance | 100 ohms |
| Soft Start | 3 seconds ramp |
| Build-up Voltage | >5VAC residual at AVR terminals |
| EMI Suppression | Internal EMI filter |
| Dimensions | 107 x 75 x 48.5 mm |
| Weight | 183g |
Compatibility
KUTAI generator systems. Compatible with: EA05A.
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 Stamford BC/UC, Basler-compatible, Marathon, Chinese-made brushless generators 50-200kW.
Competitors SX460 (Stamford), AVC63-4 (Basler).
| Parameter | EA05A | SX460 | AVC63-4 |
| Brand | KUTAI (Taiwan) | Stamford (UK) | Basler (USA) |
| Output Current | 5A cont. / 7A intermittent 10s | 4A cont. / 6A forcing 1 min | 4A cont. / 6A forcing 1 min |
| Regulation | ±0.5% | ±1% | ±1% |
| Rectification | Half-wave thyristor | Half-wave thyristor | Full-wave rectification |
| Excitation Type | Self-excited shunt | Self-excited shunt | Self-excited shunt |
| Voltage Sensing | 220/380/440V DIP triple voltage | 190-264VAC single voltage | 95-139V or 190-277V dual voltage |
| Frequency | 50/60Hz DIP selectable | 50/60Hz auto | 50/60Hz auto |
| Build-up Voltage | 5VAC residual | 6VAC residual | 6VAC residual |
| UF Protection | Yes | Yes | Yes |
| Over-Excitation Shutdown | Yes | No | Yes |
| Enclosure | Standard open-frame | Standard open-frame | Potted/sealed |
| RoHS Compliant | Yes (lead-free) | No | No (some models) |
| Parallel Operation | Compatible with EP200 module | No | No |
| Market Price | $25-38 | $25-45 | $35-55 |
Selection Advice
EA05A: strongest specs at the lowest price. 5A output = 1A more than competitors — drives larger excitation fields (important for aged generators). ±0.5% regulation halves voltage fluctuation — critical for hospitals, data centers, precision machinery. DIP triple voltage: one SKU for three markets. No potted enclosure (less suitable for wet environments), lower Western brand recognition. Best value-performance choice.
# AVR Competitor Comparison & Selection Guide
> Each AVR model has independent content listing 2-3 real competitors with detailed specification comparison and selection advice.
