Man L23/30DF, Project Manual

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GS
System description
SaCoS
one
GENSET
Created: 03.08.2009 Karger
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Last change: 16.08.2010 Karger
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2 System description
2.1 Safety system
Safety functions
The safety system monitors all operating data of the engine and initiates the required actions,
i.e. engine shut-down, in case the limit values are exceeded. The safety system is integrated
the Display Module.
The safety system directly actuates the emergency shut-down device and the stop facility of
the speed governor.
Auto shutdown
Auto shutdown is an engine shutdown initiated by any automatic supervision of engine internal
parameters.
Emergency stop
Emergency stop is an engine shutdown initiated by an operator manual action like pressing an
emergency stop button. An emergency stop button is placed at the Control Unit on engine. For
connection of an external emergency stop button there is one input channel at the Connection
Box.
Engine shutdown
If an engine shutdown is triggered by the safety system, the emergency stop signal has an
immediate effect on the emergency shut-down device and the speed control. At the same time
the emergency stop is triggered, SaCoS
one
issues a signal resulting in the generator switch to
be opened.
Shutdown criteria
Engine overspeed
Failure of both engine speed sensors
Lube oil pressure at engine inlet low
HT cooling water temperature outlet too high
High bearing temperature/deviation from Crankcase Monitoring System. (optional)
High oilmist concentration in crankcase. (optional)
Remote Shutdown. (optional)
o
Differential protection (optional)
o
Earth connector closed (optional)
o
Gas leakage (optional)