Kohler 500EOZCS Operation page 31

to the paralleling bus (running with paralleling
breaker/contactor closed). Generators in Baseload,
System Control, or Unload mode are not taking into
consideration for this capacity.
Bus Total Power. The sum of the power output of all
generators which are connected to the bus and
available for sharing load. Generators in Baseload,
System Control, or Unload mode are not taking into
consideration for this level. The Bus Total Power is
compared to the Start kW and Stop kW of the generator
to determine if the generator should be started, stopped,
or remain as-is.
Start kW. The threshold of Bus Total Power above which
the Start Accumulator for this generator will start filling.
Note: The Accumulator fill rate is higher for larger
differences between Bus Total Power and Start
kW.
Stop kW. The threshold of Bus Total Power below which
the Stop Accumulator for this generator will start filling.
Note: The Accumulator fill rate is higher for larger
differences between Stop kW and the Bus Total
Power.
Preemptive Warnings. A preemptive warning tells the
system that a generator may have a problem in the
future. If Generator Management has stopped the
generators, it will start one of the unused generators but
keep the running generator with the preemptive fault
online. The following conditions are considered
preemptive warnings:
Low Oil Pressure Warning
D
Low Fuel Pressure Warning
D
High Coolant Temperature Warning
D
Failure to Synchronize Warning
D
Water in Fuel Warning
D
Fuel Tank Leak Warning
D
Loss of Fuel Warning
D
A preemptive warning disables Generator Management
on the unit which has the warning. It will run as long as
the start signal is present.
Note: Most of the preemptive warnings have a
shutdown which follows shortly after the warning.
The intent of starting another generator is that it
will be able to supply the load when the generator
shuts down on a fault.
TP-7126 5/20
Start Accumulator. The Start Accumulator fills from 0%
to 100% while the Bus Total Load remains above the
Start kW. This generator will be signaled to start when
this accumulator reaches 100%.
Note: The Start Accumulator will reset to 0% if the Bus
Total Power drops below the Start kW for one
second.
The Start Accumulator may be filling while the engine is
running in cooldown. If it reaches 100% before the
cooldown is complete, the generator will synchronize
and close to the bus (it will not have to go through a start
sequence).
Stop Accumulator. The Stop Accumulator fills from 0%
to 100% while the Bus Total Load remains below the
Stop kW. This generator will be signaled to stop when
this accumulator reaches 100%.
Note: The Stop Accumulator will reset to 0% if the Bus
Total Power exceeds the Stop kW for one second.
The generator may remain running and connected to
the paralleling bus for a few seconds after the Stop
Accumulator reaches 0%.
generator is unloading so that it can trip the circuit
breaker/contactor connecting it to the bus with minimal
wear on the contacts in the breaker/contactor and
minimal disturbance to the voltage and frequency of the
system.
Run Time Threshold. The maximum difference in
runtime hours that generator management will accept
before it re-sorts the Start/Stop Order of the generators
to equalize hours (see Gen Management Order earlier
in this section). All the generators in the system must
have the same setting for the Run Time Threshold for
the generator management to operate. If this parameter
is changed on any controller, it will be updated on all the
generators which are connected to the PGEN network.
Total Run Time. The actual runtime hours of this
generator (to the nearest tenth of an hour). This
parameter is also available in the Generator Information
screen, but is rounded to the nearest hour.
Fuel Level Threshold. The maximum difference in fuel
level that generator management will accept before it
re-sorts the Start/Stop Order of the generators to
equalize fuel level. (See Gen Management Order earlier
in this section). All the generators in the system must
have the same setting for the Fuel Level Threshold for
the generator management to operate. If this parameter
is changed, it will be updated on all the generators which
are connected to the PGEN network.
During this time, the
Section 1 Specifications 31