Overview
The EA350 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
- 4A Continuous Output — 63VDC max, 7A intermittent for 60 seconds
- ±1% Regulation — Reliable voltage control
- Self-Excited Shunt — Simple, proven excitation topology
- DIP Switch 50/60Hz — No jumper needed
- UF Protection & Overexcitation Shutdown — Dual safety
- Internal EMI Filter — Reduces interference
- KUTAI Quality — OEM replacement for multiple brands
Technical Specifications
| Parameter | Value |
|---|---|
| Sensing Input | 190-240VAC, 1-phase |
| Power Input | 90-270VAC, 1-phase |
| Output Voltage | Max 63VDC |
| Output Current | Continuous 4A, Intermittent 7A for 60s |
| Regulation Accuracy | <±1% |
| Frequency | 50/60Hz (DIP switch selectable) |
| Excitation Type | Self-excited shunt, half-wave thyristor |
| UF Protection | Yes, adjustable knee point |
| Overexcitation Shutdown | Yes, auto shutdown |
| EMI Suppression | Internal EMI filter |
| Min Field Resistance | 15 ohms |
| Build-up Voltage | >5VAC residual at AVR terminals |
Compatibility
KUTAI generator systems. Compatible with: EA350.
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 Universal replacement, 50-200kW brushless generators.
Competitors EA05A (KUTAI upgraded model), SX460 (Stamford entry-level).
| Parameter | EA350 | EA05A | SX460 |
| Brand | KUTAI (Taiwan) | KUTAI (Taiwan) | Stamford (UK) |
| Output Current | 4A | 5A | 4A |
| Regulation | ±1% | ±0.5% | ±1% |
| Voltage Selection | Fixed | DIP triple voltage | Fixed |
| Price | $15-22 | $25-38 | $25-45 |
Selection Advice
The EA350 is KUTAI’s most economical AVR, positioned below the EA05A. It has 1A less current, one tier lower regulation accuracy, no DIP voltage selection, and no over-excitation shutdown. Suitable for budget-sensitive replacement needs requiring only basic voltage regulation. If the customer can spend $10 more, the EA05A is recommended — it leads comprehensively in current, accuracy, and features.
