Parameter Range Default Notes
stopped. If the load percentage is lower than this limit for the Delay period, then the
PMS automatically disconnects and stops a genset.
If Calculation in P is selected, then this limit is based on the percentage of active
power.
If Calculation in S is selected, then this limit is based on the percentage of apparent
power.
Delay 5 s to 1 h 30 s
If the load is less than the limit for the whole of the Delay period, then the PMS stops
a genset, according to the priority order.
Configure the parameters under Configure > Parameters > Power management rules > Configuration # > Load-dependent
start/stop > Stop 2 (where # is 1 to 8) to define the second set of stop parameters. By default, the PMS ignores these parameters.
Parameter
Range Default Notes
Enable
Not enabled,
Enabled
Not
enabled
Not enabled: The PMS ignores this set of parameters.
Enabled: The PMS uses this set of parameters for load-dependent stop. The Stop
1 parameters can also be active. The controller will stop a genset if either set of
parameters allow the stop.
P available
limit
1 kW to 9 GW 200 kW
Calculation in P and Method = Power must be selected, otherwise this parameter is
ignored.
If this amount of PMS power would be available for the Delay period if a genset was
stopped, then the PMS stops a genset, according to the priority order.
S available
limit
1 kVA to 9
GVA
200 kVA
Calculation in S and Method = Power must be selected, otherwise this parameter is
ignored.
If this amount of PMS apparent power would be available for the Delay period if a
genset was stopped, then the PMS stops a genset, according to the priority order.
Load limit 1 to 100 % 70 %
Method = Percent must be selected, otherwise this parameter is ignored.
For the stop Load limit, the load percentage is the total power consumed, as a
percentage of the PMS nominal power that would be connected if a genset was
stopped. If the load percentage is lower than this limit for the Delay period, then the
PMS automatically disconnects and stops a genset.
If Calculation in P is selected, then this limit is based on the percentage of active
power.
If Calculation in S is selected, then this limit is based on the percentage of apparent
power.
Delay 5 s to 1 h 30 s
If the load would be less than the limit for the whole of the Delay period if a genset
was stopped, the PMS stops a genset, according to the priority order.
Example
Stop load limit example
The system consists of three gensets. Genset A has a nominal power of 1000 kW. Gensets B and C each have a nominal
power of 500 kW. The priority is A, B, C. The total power consumed in the system (that is, the load) is 700 kW. The Power
selection is Calculation in P. The Method is Percent. The Load limit is 60 %.
DESIGNER'S HANDBOOK 4189340911K UK Page 232 of 521
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