The ESD5221 is an all-electronic engine governor designed for precise and responsive speed control in diesel generators and alternators. It uses closed-loop control with a proportional electric actuator and magnetic speed sensor, supporting both isochronous and droop modes. Built for durability, it withstands harsh engine environments.

• Key Features:
  • Fast response to transient load changes
  • Adjustable droop and idle operation
  • Protection against reverse battery voltage, transient voltages, and accidental short circuits
  • Fail-safe design in case of speed sensor signal loss or battery failure
  • Simple installation and non-interacting performance controls
• Specifications:
  • Working Voltage: 12-32V DC
  • Output Current Range: 0-5A
  • Speed Sensor Signal: 0.5-120 V RMS
  • Temperature Range: -40°C to +85°C
  • Relative Humidity: <95%
  • Speed Range: 1K-7.5K Hz
  • Speed Trim Range: ±200Hz
  • Overspeed Set Range: 2KHz-8.5KHz