The ESD5550E Speed Control Unit (Governor) is a rugged, all-electronic speed controller designed to manage engine speed with high precision. It is part of the elite ESD5500 series but is specifically equipped with features to handle engines with Normally Closed (N/C) fuel systems and high-current actuators. It is widely used in global power generation for its ability to maintain a rock-steady frequency, even in the face of sudden, massive load changes.
| Feature | Detailed Specification |
| Model Number | ESD5550E |
| Series | ESD5500 Series (High Performance / N/C) |
| Operating Voltage | 12V or 24V DC (Standard) |
| Steady State Stability | ±0.25% |
| Speed Range | 1KHz – 7.5KHz |
| Max Output Current | 10A (Peak) |
| Starting Fuel Control | 0 – 100% (Adjustable) |
| Speed Ramp Time | 1 – 20 Seconds (Adjustable) |
| Speed Drift | < ±1% (Thermal Stability) |
| Input Signal (MPU) | 0.5 – 120 V RMS |