Marine Installation Manual
2021-08
2-18
2 Engine Power and Speed
2.8 CPP requirements for the propulsion control system
X72DF
2.8
CPP requirements for the propulsion control
system
WinGD recommends including CPP control functions in an engine Remote
Control System (RCS) from an approved supplier. This ensures, amongst others,
that the requirements of the engine builder are strictly followed.
The following operating modes can be included in the propulsion control system:
•
Combinator mode 1
Combinator mode for operation without a shaft generator, or with a shaft
generator and frequency control system. Any combinator curve including a
suitable light running margin can be set in field A.
•
Combinator mode 2
Optional mode used in connection with shaft generators. During manoeu
-
vring, the combinator curve is freely selected in field A. At sea, the engine
is operated at constant speed on Line 12, between point F and CMCR.
For manual and emergency operation, separate set-points for speed and pitch are
usually provided. At any location allowing such operation, a plate must be
placed with the following warning:
The pitch value (xx) is to be defined according to installation data.
For additional information about the CPP application in the propulsion control
system, see the section
5.4.2 Recommended manoeuvring characteristics,
Operation in the
prohibited area
In addition, if the engine is operated for more than three minutes in the prohib
-
ited operation area, an alarm must be provided in either the main engine safety
system or the vessel’s alarm and monitoring system.
If the engine is operated for more than five minutes in the prohibited operation
area, then the speed must be reduced below 62.3rpm.
Engine must not be operated continuously at a
pitch lower than xx% at any speed above 62.3rpm.
