(2) Speed control unit for governor system
The ESD5550 Series speed control unit is an all electronic device designed to control
engine speed with fast and precise response to transient load changes. This closed loop
control, when connected to a proportional electric actuator and supplied with a magnetic
speed sensor signal, will control a wide variety of engines in an isochronous or droop
mode. It is designed for high reliability and built ruggedly to withstand the engine environ-
ment.
Simplicity of installation and adjustment was foremost in the design. Non-interacting perfor-
mance controls allow near optimum response to be easily obtained.
The primary features of the ESD5550 Series speed control unit are the engine STARTING
FUEL and SPEED RAMPING adjustments. The use of these features will minimize engine
exhaust smoke experienced prior to attaining engine operating speed.
Other features include adjustable droop and idle operation, inputs for accessories used in
multi-engine or special applications, protection against reverse battery voltage, transient
voltages, accidental short circuit of the actuator and fail safe design in the event of loss of
speed sensor signal or battery supply.
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Engine model
P126TI
GAC governor model
ACE 175A
Speed control unit model
ESD5550
