Overview
The EA16A 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
- 16A Continuous Output — 90VDC max, 20A non-continuous for 10 seconds
- EA15A Enhanced Design — Upgraded for parallel generator systems
- ±0.5% Regulation — Precision analog control
- 170-510VAC Sensing — Ultra-wide range, DIP switch selectable
- Parallel-Ready — Superior load sharing with 1A/5A CT input
- Analog Input — External voltage adjustment via 0-5VDC signal
- Half-Wave Thyristor — Proven reliable excitation
Technical Specifications
| Parameter | Value |
|---|---|
| Sensing Input | 170-510VAC, 1-phase, 2-wire (DIP switch selectable) |
| Power Input | 60-300VAC, 1-phase, 2-wire |
| Output Voltage | Max 90VDC at 240VAC input |
| Output Current | Continuous 16A, Non-continuous 20A for 10s |
| Regulation Accuracy | <±0.5% (with 4% engine governing) |
| Frequency | 50/60Hz (DIP switch selectable) |
| Excitation Type | Self-excited shunt, half-wave thyristor |
| Current Transformer | 1A or 5A selectable (for parallel operation) |
| UF Protection | 95% set point, 20-second delay |
| Min Field Resistance | 5 ohms |
| Parallel Function | Enhanced vs EA15A — superior load sharing |
| Dimensions | 156 x 106 x 43 mm |
| Weight | 450g |
Compatibility
KUTAI generator systems. Compatible with: EA16A.
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 100kW+ large generator sets operating in parallel.
Competitors EA15A-2 (non-parallel), MX321 (Stamford parallel).
| Parameter | EA16A | EA15A-2 | MX321 |
| Output | 16A | 15A | 5A |
| Parallel | Yes | No | Native support |
| Excitation | Self-excited | Self-excited | PMG |
| Price | $70-100 | $50-70 | $180-300 |
Selection Advice
The EA16A is KUTAI’s only parallel-capable AVR, with 16A high current. Compared to the Stamford MX321, the EA16A is approximately 1/3 the price with 3x the current. If PMG excitation reliability is not required, the EA16A is a high-value choice for parallel operation scenarios.
