The GAC analog ESD5100 governor is designed to precisely control engine speed with rapid responses to transient load changes and is ideal for parallel running.

GAC ESD5100 electronic governor

The GAC ESD5100 electronic governor is ideal for variable, isochronous and droop speed operation

Ruggedly built to withstand all engine environments, the GAC ESD5100 governor will control a wide variety of engines in an isochronous or droop mode when connected to a proportional electronic throttle actuator and supplied with a magnetic pickup sensor signal. The governor also features a remote switchable idle/run speed selection.

Isochronous speed control supplies a constant frequency of electricity under varying loads – so there will be no generator droop or overshoot. Overshoot is just as problematic as droop and can spell bad news for sensitive equipment such as IT and healthcare systems. The inclusion of isochronous speed control will eliminate the danger of these occurrences.

Main features also include:

  • Multi-Voltage Units.
  • Adjustable PID.
  • Auxiliary Accessory Inputs.
  • Temperature Compensated Available.
  • Soft Coupling Options Available.
  • EFC Reverse Acting Options Available.
  • EFC Forward Acting.
  • Light Force Option Available.

The GAC ESD5100 also features protection against:

  • reverse battery voltage.
  • transient voltages.
  • accidental short circuit of the actuator.
  • fail safe design in the event of loss of speed sensor signal or battery supply.

Will the GAC ESD5100 governor fit my brand of engine?

The GAC ESD5100 electronic governor is compatible with all GAC proportional actuators and is suitable for a wide range of engine brands:

  • Perkins.
  • Yanmar.
  • Kubota.
  • Isuzu.
  • Mitsubishi.
  • Caterpillar.
  • Farymann.
  • Shibaura.

Please download our GAC datasheet which features a full compatibility table – it’ll tell you which controller, actuator & magnetic pickup sensor your engine needs. Alternatively, see below for our online GAC product selector.

Why should I switch to electronic governing?

The GAC range of electronic governing systems make it simple to get maximum productivity from your engines and gensets.

With electronic governing:

  • Gensets maintain a constant frequency whatever the load. Sensitive electronic equipment is protected against damaging fluctuations. This is especially important in IT and healthcare.
  • Engines respond faster to load changes – as much as 200 times faster.
  • You improve your fuel economy because an electronic governor accurately sets the engine’s throttle to match the load. That reduces your bills and your environmental footprint.
  • You avoid the massive disruption of installing a new engine from scratch.


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