Fail Class - Deif GPC-3 Designers Reference Handbook

GPC-3 DRH 4189340587 UK
Set point selection Description
Internal Set point is taken from the internal settings, for example nominal frequency for fixed
frequency
External The set point is taken from the analogue inputs (+/-10 V DC)
Communication Set points are taken from the control register
Control set points
The control set points are described in the table below.
Mode/Set point
Fixed frequency
Fixed power
Frequency droop
Load sharing

4.9 Fail class

All activated alarms must be configured with a fail class. The fail classes define the category of the alarms
and the subsequent alarm action.
Five different fail classes can be used. The tables below illustrate the action of each fail class when the en-
gine is running or stopped.
Engine running
Fail class/Action Alarm horn
relay
1 Block X
2 Warning X
3 Trip of GB X
4 Trip and stop X
5 Shutdown X
6 Safety stop X
Safety stop will not de-load the GB in Manual or SWBD mode. In this case, the fail class will
have the same functionality as the "Block" fail class.
The table illustrates the action of the fail classes. If, for example, an alarm has been configured with the "shut-
down" fail class, the following actions occur:
● The alarm horn relay will activate
● The alarm will be displayed in the alarm info screen
● The generator breaker will open instantly
● The genset is stopped instantly
● The genset cannot be started from the unit (see next table)
DEIF A/S
Internal
Nom. frequency
Menu 7051
Menu 2514 or 2573
Analogue lines
Alarm dis-
play
X
X
X
X
X
X
External
+/-5 Hz
0 to 100 %
+/-5 Hz
+/-5 Hz
De-load Trip of GB Cooling-
X
X
X
X
Additional functions
Communication
(Ctrl. reg. table)
Address 3
Address 1
Address 3
Analogue lines
Stop gen-
down genset set
X X
X
X X
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