Overview
The EA440 is a KUTAI automatic voltage regulator for brushless generators. It maintains generator output voltage by controlling exciter field current with ±1% regulation accuracy.
Key Features
- ±1% Regulation — Stable voltage for industrial applications
- Parallel Operation Capable — DIP, TRIM & DROOP adjustable
- Wide Sensing Range — 90-520VAC for global compatibility
- 50/60Hz Selectable — Universal frequency support
- Sensing Voltage Loss Protection — Automatic fault detection
- Under-Frequency LED Indicator — Visual status at a glance
- Soft Start Voltage Ramping — Eliminates startup surges
- Compatible SX440 Replacement — Drop-in for Stamford systems
Technical Specifications
| Parameter | Value |
|---|---|
| Sensing Input | 90-520VAC, 1-phase 2-wire |
| Output Voltage | Max 63VDC |
| Output Current | Continuous 4A |
| Regulation Accuracy | <±1% |
| Frequency | 50/60 Hz selectable |
| Excitation Type | Self-excited shunt |
| Parallel Operation | Yes, DIP/TRIM/DROOP adjustable |
| Soft Start | Yes |
| UF Protection | Yes, with LED indicator |
| Sensing Loss Protection | Yes |
Compatibility
Compatible with KUTAI generator systems and brushless alternators with matching terminal layout.
Why Choose ZenixPower
- KUTAI Genuine — Taiwanese quality AVR
- DIP Switch Configurable — Easy field adjustment
- ±1% Precision — Stable voltage under load variations
Specification Comparison
Compatible Generators Stamford AS series compatible replacement, 200kW+ generator sets.
Competitors AS440 (Stamford OEM).
| Parameter | EA440 | EA440-T | AS440 |
| Output | 4A | 4A | 4A |
| Regulation | ±0.5% | ±0.5% | ±0.5% |
| 3-Phase Sensing | No | Yes | Yes |
| Price | $30-50 | $35-55 | $70-100 |
Selection Advice
The EA440 is positioned against the AS440, with identical performance at approximately 40-50% of the price. The EA440-T adds 3-phase sensing. If Stamford OEM branding is not required, the EA440 offers excellent value as an AS440 alternative.
