GAC Speed Governor Speed Controller ESD5520

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The ESD5520 Series speed control unit?is an all-electronic device designed to control engine speed with fast and precise response transient load changes.

(ESD5520 is designed for EFC series.)

Isochronous Operation/Steady Stability---- +/-0.25% or better

Supply----12 or 24 VDC Battery Systems(transient&reverse voltage protected)

Power Consumption----50 ma continuous plus actuator current

Maximum Actuator Current at 25celsius (77celsius F)----10 Amps continuous

Specific Data



  • Supply 12 or 24 VDC Battery System (Transient and Reverse Voltage)
  • Polarity Negative Ground (Case Isolated)
  • Power Consumption 50 ma continuous plus actuator current
  • Actuator Current Range @ 25
  • Deg. C - (Inductive Load) Min.2.5 Amps; Max. 10Amps continuous
  • PID PID parameter is different with ESD5500
  • Speed Sensor Signal 0.5-120 Volts RMS




  • Isochronous Operation/Steady
  • State Stability ㊣0.25% or better
  • Speed Range/Governor 1K to 7.5K Hz continuous
  • Speed Drift with Temperature ㊣1 Max
  • Idle Adjust CW 60% of set speed
  • Idle Adjust CCW Less than 1200 Hz.
  • Droop Range 1-5% regulation
  • Droop Adj. Max. (K-L Jumpered) 400 Hz., ㊣75Hz. Per 1.0A change
  • Droop Adj. Min. (K-L Jumpered) 15Hz., ㊣6Hz. Per 1.0A change
  • Speed Trim Range ㊣200 Hz
  • Remote Variable Speed Range 500 - 7.5 Hz. Or any part there of
  • Terminal Sensitivity J 100 Hz., ㊣ 15Hz / Volt @ 5.0 K Impedance
  • Terminal Sensitivity L 735 Hz., ㊣60 Hz / Volt @ 65 K Impedance
  • Terminal Sensitivity N 148 Hz., ㊣10 Hz / Volt @ 1 Meg. Impedance
  • Terminal Sensitivity P 10 VDC Supply @ 20 ma Max




  • Ambient Operating Temperature
  • Range -40 to +85 Deg. C
  • Relative Humidity Up to 95%
  • All Surface Finishes Fungus Proof and Corrosion Resistant



  • Vibration 1G at 20 to 100 Hz.
  • Testing 100% Functionally Tested
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