Kohler EKOZD Series Service page 233

Genset Maximum Percent Capacity
The Genset Maximum Percent Capacity is the
maximum level that the load management system will
automatically place on the generator. Each priority is
expected to provide 15% load on the generator system,
so load management will ensure that the generator load
is below 15% less than the Genset Maximum Percent
Capacity before permitting another load to add.
Range: 0.0% - 120.0%
Default: 70.0%
Generator Overloaded Percent
The Generator Overloaded Percent is the output power
threshold above which the load management system
considers a generator or generator system to be
overloaded. Loads will start shedding in their priority
order if the generator system output power exceeds this
level for long enough. Loads will continue to shed in
decreasing intervals until the output power of the
generator system drops below this level.
Range: 0.0% - 120.0%
Default: 85.0%
Under Frequency Shed Level
The Under Frequency Shed Level is the degree of
frequency droop (operation below the nominal value)
that is permitted on the generator system before the
load management system considers a generator or
generator system to be overloaded. Loads will start
shedding in their priority order if the generator system
frequency droop exceeds this level for long enough.
Loads will continue to shed in decreasing intervals until
the frequency of the generator system recovers to the
point where the droop drops below this level.
Range: 0.00Hz - 5.00Hz
Default: 0.50Hz
Base Load Add Time
The Base Load Add Time is the time required to add a
load with 25% available capacity (generator system
power output is 40% below the Genset Maximum
Percent Capacity). The load will add more quickly with
lower load and take longer as the load increases, but the
time is relative to the base load add time.
Range: 10.0 sec - 2400.0 sec
Default: 60.0 sec
TP-6953 7/19
Base Overload Shed Time
The Base Overload Shed Time is the time required to
shed a load with 10% overload on the generator system
(generator system power output is 10% above the
Generator Overloaded Percent). The load will shed
more quickly with higher load and take longer as the load
decreases, but the time is relative to the base overload
shed time.
Range: 2.0 sec - 30.0 sec
Default: 30.0 sec
Base Under Frequency Shed Time
The Base Under Frequency Shed Time is the time
required to shed a load with 1Hz of frequency droop
(frequency is 1Hz below the Under Frequency Shed
Level less than the rated frequency of the generator).
The load will shed more quickly with lower frequency
and take longer as the frequency increases, but the time
is relative to the Base Under Frequency Shed Time.
Range: 1.0 sec - 20.0 sec
Default: 5.0 sec
12.6.8 Miscellaneous
Fail to Open Delay
The Fail to Open Delay is the time that the controller will
wait after applying a trip signal to the circuit breaker to
see the breaker status indicate open. If the breaker
status does not indicate open within this time, the
controller will issue a Failure to Open warning. The
controller continues to apply the trip signal to the circuit
breaker and if the breaker opens at a later time, the
warning will be cleared automatically (but still stored in
the event log). If this warning recurs frequently in the
event log of a generator, it may indicate that the Fail to
Open Delay is set for too short of a time and that the
breaker is not able to respond quickly enough to match
the Fail to Open Delay. In this case, the Fail to Open
delay can be lengthened, but consideration of the
protective relay functionality and timing should be
considered when lengthening the timing, as it may be
preferred to troubleshoot the breaker for slow operation
first.
Range: 0.1 sec - 30.0 sec
Default: 1.0 sec
Section 12 Paralleling System Information 233