Kohler 500EOZCS Operation page 30

Run Time. The generator management start/stop
D
order is determined by the runtime hours on the
generators. In this mode, the order is determined to
ensure that the generator with the fewest runtime
hours is the last to stop. Each subsequent order is
assigned to generators with increasing runtime
hours.
If a generator is not running, the system will add the
Run Time Threshold to the runtime hours for that
generator before it considers it in the order—this
allows the generators to avoid starting and
stopping continuously. The actual runtime will have
to differ by more than the threshold to force the
generator order to switch (the stopped generator
will start, synchronize to the paralleling bus, and
begin sharing load—the running generator will
soft-unload, disconnect from the bus, cool down
and stop).
The generator management order is not user
adjustable in runtime mode.
Note: If the load on the system requires an
additional generator to start, the generator
with the most runtime hours will always be
the first one to stop if the load decreases
enough to permit it (the threshold is no
longer taken into consideration as soon as
the generator is connected to the paralleling
bus).
Fuel Level. The generator management start/stop
D
order of the generators is determined by the level of
the fuel in the tank which supplies each generator.
In this mode, the order is determined to ensure that
the generator with the most fuel is the last to stop.
Each subsequent order is assigned to generators
with decreasing fuel percentage.
If a generator is running, the system will add the
Fuel Level Threshold to the measured Fuel Level
for that generator before it considers it in the order.
This allows the generators to avoid starting and
stopping continuously. The actual fuel level will
have to differ by more than the threshold to force
the generator order to switch (the stopped
generator will start, synchronize to the paralleling
bus, and begin sharing load and the running
generator will soft-unload, disconnect from the
bus, cool down and stop).
The generator management order is not user
adjustable in Fuel Level mode.
30 Section 1 Specifications
Note: Fuel Level Order Selection mode requires
separate fuel tanks for the generators and
fuel level senders connected to the
controller to operate.
Level mode without sensors is not defined.
Note: If the load on the system requires an
additional generator to start, the generator
with the lowest fuel level will always be the
one to stop (the threshold is no longer taken
into consideration as soon as the generator
is connected to the paralleling bus).
Gen Management. Allows permanent disabling of the
generator management on this generator. This
parameter can be set individually for each generator
and will inhibit the
Configuration Mismatch Warning for this generator if set
to OFF.
Note: Disabling the generator management on one
generator in a paralleling system will not keep the
other generators in the paralleling system from
alarming if the
configuration of any of the other nodes differs
from the disabled generator.
Note: Generators with
disabled are not taking into consideration for
generator management on the other generators.
It is not recommended to disable any of the
generators in a paralleling system where
generator management is intended to be used,
the generator management may operate too
many generators in these cases.
Generator management defaults to OFF. It should be
enabled on all generators in the system if it is desired.
Gen Management Order. Determines the Start/Stop
Order of this generator. Generators with a lower order
will start before generators with a higher order, higher
order generators stop before lower order generators.
If the Generator Management Order for a generator
changes, generator management will start any
generators which were involved in the order changing
process (including automatic re-sort). After the
incoming generators connect to the paralleling bus, the
generators with a high enough order to stop will start
filling their accumulators to stop.
The generator order is adjustable in Manual/Fixed
Order selection mode. It is only adjustable in Runtime or
Fuel level mode if the generators have identical runtime
or fuel level.
Total Bus Capacity. The total bus capacity is simply the
sum of the kW rating of all generators that are connected
Operation of Fuel
Generator Management
generator management
Generator Management
TP-7126 5/20