Overview
The DER1 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
- Digital Regulation — Precise ±1% voltage control for stable generator output
- Ultra-Wide Sensing Range — 40-270VAC accommodates virtually all generator voltage configurations
- 1/3-Phase Sensing — Flexible input for single or three-phase generator systems
- Wide Frequency Range — 12-72Hz operation for variable-speed and standard generator applications
- 5A Continuous Output — High current capacity for large alternator excitation
- Extended Temperature Range — Reliable operation from -25°C to +70°C
- Compact Digital Design — Modern microprocessor-based control in a space-saving form factor
Technical Specifications
| Parameter | Value |
|---|---|
| Sensing Input | 40-270VAC, 1 or 3 phase |
| Frequency Range | 12-72Hz |
| Output Current | 5A continuous max |
| Excitation Current | 4A |
| Regulation Accuracy | <±1% |
| Operating Temperature | -25°C to +70°C |
Compatibility
- Mecc Alte Alternator Series
- Compatible with: Part.: DER1
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 Mecc Alte digital upgrade requirements.
Competitors DSR with communication (RS485/RS232/USB), DER1 without.
| Parameter | DER1 | DSR | SR7 |
| Control | Digital | Digital | Analog |
| Communication | None | RS485/RS232/USB | None |
| Price | $80-130 | $150-250 | $40-60 |
Selection Advice The DSR is Mecc Alte’s high-performance model with unique communication interfaces for remote voltage adjustment and fault diagnostics — suitable for smart power stations requiring SCADA access. For applications without remote communication needs, the DER1 is sufficient.
