MAN B&W 18.04
Page of 7
MAN Diesel
MAN B&W MC/MC-C, ME/MEC/MEGI/ME-B engines 198 70 403.0
Alarm – Slow Down and Shut Down System
Alarm, slow down and remote indication sensors
The International Association of Classication So-
cieties (IACS) indicates that a common sensor can
be used for alarm, slow down and remote indica-
tion.
A general view of the alarm, slow down and shut
down systems is shown in Fig. 8.04.0.
Tables 8.04.02 and 8.04.03 show the require-
ments by MAN Diesel for alarm and slow down
and for UMS by the classication societies (Class),
as well as IACS’ recommendations.
The number of sensors to be applied to a specic
plant for UMS is the sum of requirements of the
classication society, the Buyer and MAN Diesel.
If further analogue sensors are required, they can
be ordered as option: 4 75 28.
Slow down functions
The slow down functions are designed to safe-
guard the engine components against overloading
during normal service conditions and to keep the
ship manoeuvrable if fault conditions occur.
The slow down sequence must be adapted to the
actual plant parameters, such as for FPP or CPP,
engine with or without shaft generator, and to the
required operating mode.
The shut down system must be electrically sepa-
rated from other systems by using independent
sensors, or sensors common for the alarm system
but with galvanically separated electrical circuits,
i.e. one sensor with two sets of electrically inde-
pendent terminals. The list of sensors are shown
in Table 8.04.04.
Basic safety system design and supply
The basic safety sensors for a MAN Diesel engine
are designed for Unattended Machinery Space
(UMS) and comprises:
• the temperature sensors and pressure sensors
that are specied in the ‘MAN Diesel’ column
for shut down in Table 8.04.04.
These sensors are included in the basic Extent of
Delivery, EOD: 4 75 24.
Alarm and slow down system design and supply
The basic alarm and slow down sensors for a
MAN Diesel engine are designed for Unattended
Machinery Space (UMS) and comprises:
• the sensors for alarm and slow down, option: 4
75 27.
The shut down and slow down panels can be or-
dered as options: 4 75 60, 4 75 64 or 4 75 65
whereas the alarm panel is yard’s supply, as it
normally includes several other alarms than those
for the main engine.
For practical reasons, the sensors for the engine
itself are normally delivered from the engine sup-
plier, so they can be wired to terminal boxes on
the engine.
The number and position of the terminal boxes
depends on the degree of dismantling specied in
the Dispatch Pattern for the transportation of the
engine based on the lifting capacities available at
the engine maker and at the yard.
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