INFO
The precautionary genset start is based on the busbar voltage and frequency alarms. You cannot disable the precautionary
genset start based on an alarm. However, you can change the busbar voltage and frequency alarm parameters.
7.4.12 Number of gensets connected
These parameters determine the minimum and maximum number of connected gensets required for the section.
Configure the parameters under
Configure > Parameters > Power management rules > Configuration # > Number of gensets
connected
.
Maximum
These parameters set the maximum number of gensets connected for GENSET controllers in AUTO mode.
Parameter Range
Default
Notes
Enable
Not enabled,
Enabled
Not enabled
Not enabled
: The power management system ignores this limit.
Enabled
: The power management system uses this limit.
Set point
1 to 64
5
In AUTO mode, the load-dependent start function will not start another genset if this
would result in more gensets running than this set point. This parameter only applies
to the number of connected GENSET controllers in AUTO mode.
The system is limited to a maximum of 12 controllers.
INFO
This parameter is an absolute limit on the number of connected GENSET controllers in AUTO mode. For example, if the
maximum number of gensets are already running, the power management system will not connect an additional genset
temporarily to take over the load from a running genset. This means that if the maximum number of gensets is already
running, then changing the priorities will not connect a new genset.
CAUTION
This parameter could cause a blackout due to insufficient power. If the maximum number of gensets are already
connected, the controllers will not automatically connect additional gensets.
Minimum
These parameters set the minimum number of gensets connected with their GENSET controllers in AUTO mode. Note that any
gensets with GENSET controllers in SEMI mode or under switchboard control are not included. You can use these parameters to
guarantee a minimum level of power available.
Parameter Range
Default
Notes
Enable
Not enabled,
Enabled
Not
enabled
Not enabled
: The power management system ignores this limit.
Enabled
: The power management system uses this limit.
Set point
1 to 64
1
The minimum set point.
The power management system starts more gensets if fewer gensets are connected than
this set point.
The load-dependent stop function does not stop another genset if this would result in
fewer connected gensets than this set point. The minimum number of gensets continue
to run, even if the load is low and the load-dependent stop function otherwise would stop
one or more gensets.
DESIGNER'S HANDBOOK 4189340911K UK
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