Overview
The DVR2000E 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 Voltage Regulation — Microprocessor-based ±1% precision control
- 3A Continuous Output — 75VDC maximum, 7.5A intermittent for 10 seconds
- Wide Sensing Range — 90-600VAC accommodates global voltage standards
- Broad Frequency Range — 25-420Hz for variable-speed applications
- Dual Excitation — Self-excited or PMG selectable
- Direct OEM Replacement — Plug-and-play for Marathon alternators
Technical Specifications
| Parameter | Value |
|---|---|
| Sensing Input | 90-600VAC |
| Frequency | 25-420 Hz nominal |
| Power Input | 180-240VAC, 250-300Hz |
| Output Voltage | Max 75VDC |
| Output Current | Continuous 3A DC, Intermittent 7.5A for 10s |
| Regulation Accuracy | <±1% (with 4% engine governing) |
| Excitation Type | Self-excited / PMG selectable |
| Digital Control | Yes, microprocessor-based |
Compatibility
- Marathon Generator Alternators
- Compatible with: Part.: DVR2000E
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 Marathon MAGNAPLUS medium-to-large.
Competitors BE2000E (4A/analog) vs DVR2000E (3A/digital).
| Parameter | BE2000E | DVR2000E | SE350 |
| Output | 4A | 3A | 3.5A |
| Control | Analog | Digital | Analog |
| Enclosure | Standard | Standard | Fully sealed |
| Price | $40-60 | $100-150 | $50-80 |
Selection Advice The DVR2000E is Marathon’s only digital AVR with microprocessor control. The key advantage of digital is long-term stability — analog AVR potentiometers drift over time (may need recalibration after 2-3 years), while digital auto-calibrates. If the customer requires long-term maintenance-free operation, the DVR2000E is worth the $50-70 premium.
