Man B&W S80ME-C7, Project Manual

Page: 272 / 353

MAN B&W 16.01
Page 6 of 8
MAN Diesel
MAN B&W ME/MEC engines 198 48 476.5
Engine Control System Interface to Surrounding Systems
To support the navigator, the vessels are
equipped with a ship control system, which in-
cludes subsystems to supervise and protect the
main propulsion engine.
Alarm system
The alarm system has no direct effect on the ECS.
The alarm alerts the operator of an abnormal con-
dition.
The alarm system is an independent system, in
general covering more than the main engine itself,
and its task is to monitor the service condition
and to activate the alarms if a normal service limit
is exceeded.
The signals from the alarm sensors can be used
for the slow down function as well as for remote
indication.
Slow down system
Some of the signals given by the sensors of the
alarm system are used for the ‘Slow down re-
quest’ signal to the ECS of the main engine.
Safety system
The engine safety system is an independent sys-
tem with its respective sensors on the main en-
gine, fulfilling the requirements of the respective
classification society and MAN Diesel.
If a critical value is reached for one of the meas-
uring points, the input signal from the safety
system must cause either a cancellable or a
noncancellable shut down signal to the ECS.
Telegraph system
This system enables the navigator to transfer the
commands of engine speed and direction of rota-
tion from the Bridge, the engine control room or
the Local Operating Panel (LOP), and it provides
signals for speed setting and stop to the ECS.
The engine control room and the LOP are pro-
vided with combined telegraph and speed setting
units.
Remote Control system
The remote control system normally has two alter-
native control stations:
• the bridge control
• the engine control room control
The remote control system is to be delivered by
an approved supplier.
Power Management System
The system handles the supply of electrical power
onboard, i. e. the starting and stopping of the
generating sets as well as the activation / deacti-
vation of the main engine Shaft Generator (SG), if
fitted.
The normal function involves starting, synchro-
nising, phasingin, transfer of electrical load and
stopping of the generators based on the electrical
load of the grid on board.
The activation / deactivation of the SG is to be
done within the engine speed range which fulfils
the specified limits of the electrical frequency.