Power Tech Generators PTS-25 Operator's Manual page 53

GAC ESD2110 SERIES SPEED CONTROL UNIT
The ESD2110 Speed Control Unit is part of an engine governing system designed to control engine
speed and stability throughout the load range. Operating in combination with a magnetic pick-up and
electric actuator the ESD2110 will maintain the proper engine speed by adjusting the fueling system
according to the applied load. By maintaining a set engine speed the generator voltage output and
frequency will remain constant and stable.
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