Speed Control
Reverse acting 2301A Full Authority Speed Controls will operate EGB
governor/actuators. In reverse-acting systems, the actuator calls for more fuel
when the actuator current decreases. Complete loss of signal to the actuator will
drive the actuator to full fuel. This allows a backup mechanical-ballhead governor
to take control rather than shut down the prime mover as would a direct-acting
system.
External wiring connections for reverse-acting controls are identical to those for
direct-acting controls. However, changes must be made to the printed circuit
board should a control need to operate the opposite type of actuator. Changing the
supply voltage rating requires exchanging the unit for the properly rated control.