Idle Speed Setting; Speed Droop Operation; Accessory Input; Accessory Supply - KIRLOSKAR DV Series O & M Manual

Idle Speed Setting

If the IDLE speed setting was not adjusted as detailed in "Starting Fuel Adjustment" section, then place
the optional external selector switch in the IDLE position. The idle speed set point is increased by clockwise
rotation of the IDLE adjustment control. When the engine is at idle speed, the speed control unit applies
droop to the governor system to insure stable operation.

Speed Droop Operation

Droop is typically used for the paralleling of engine driven generators.
Place the optional external selector switch in the DROOP position, DROOP is increased by clockwise
rotation of the DROOP adjustment control. When in droop operation, the engine speed will decrease as
engine load increases. The percentage of droop is based on the actuator current change from engine no
load to full load. A wide range of droop is available with the internal control. Droop level requirements above
10% are unusual.
If droop levels experienced are higher or lower than those required, contact the factory for assistance.
After the droop level has been adjusted, the rated engine speed setting may need to be reset. Check the
engine speed and adjust the speed setting accordingly.

Accessory Input

The AUXilary Terminal N accepts input signals from load sharing units, auto synchronizers, and other
governor system accessories, GAC accessories are directly connected to this terminal. It is recommended
that this connection from accessories be shielded as it is a sensitive input terminal.
If the auto synchronizer is used alone, not in conjunction with a load sharing module, a 3 M ohm resistor
should be connected between Terminals N and P. This is required to match the voltage levels between the
speed control unit and the synchronizer.
When an accessory is connected to Terminal N, the speed will decrease and the speed adjustment must
be reset.
When operating in the upper end of the control unit frequency range, a jumper wire or frequency trim
control may be required between Terminals G and J. This increases the frequency range of the speed
control to over 7000 Hz.

Accessory Supply

The + 10 volt regulated supply, Terminal P, can be utilized to provide power to GAC governor system
accessories. Up to 20 ma of current can be drawn from this supply. Ground reference is Terminal G.
Caution: a short circuit on this terminal can damage the speed control unit.
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