Kohler 500EOZCS Operation page 29

Note: The metering values in this screen are populated
regardless of the state of the generator system,
but the system must be in a sharing mode before
it will attempt to match generator and bus loading.
Protective Relays
The protective relays serve two purposes:
1. To protect the generator from damage and
2. To protect the loads supplied by the generator from
damage
The protective relays
commissioning and should not be adjusted except by a
trained commissioning agent. These settings are often
taken into consideration for breaker trip curves, load
control settings, and generator management settings.
The adjustment without careful consideration of the
implications may mask a problem in the system and
cause another. Properly-configured protective relays
should only trip due to a failure.
Note: All protective
breaker/contactor, but will not stop the generator
until the Trip to Shutdown Delay has expired.
During this time, the protective relay which
tripped the breaker/contactor will be listed under
the Active Events, the warning LED will be active,
and the generator will remain running.
protective relay can be reset by pressing the
AUTO button (note, if the generator is in Run, the
protective relay will have to be cleared by
stopping the generator). Pressing OFF/RESET
or removing the remote start signal to the
generator system also clears any active
protective relays.
Gen Management
Generator Management is intended to minimize wear
and tear, fuel consumption, pollutant/sound emissions,
and generated heat. It acts by signaling each generator
to stop when it is unneeded. If generator management
for a generator is disabled, the generator will
start—generator management failures will result in
additional generators running any time the system
receives a start signal (this unit or others).
Generator management sequences the generators off
in a predetermined order. The highest order generators
stop first (when load is low enough) and re-start last
(when load is too high). The order can be viewed on the
front panel of the controller, but can only be adjusted
under certain conditions (see Gen Management Order
later in this section).
The time to start a generator (if the load increases)
varies with the degree of overload.
TP-7126 5/20
are configured
relay events will trip
The time to stop a generator (if the load is low enough
that the generator is no longer needed) varies with the
degree of available capacity.
Note: Receipt of a start signal will cause all generators
to start, synchronize, and close to the bus.
Generator management requires that the
generators are available (not faulted) in order to
be permitted to stop. If a generator is faulted or
manually stopped and then placed back in Auto,
Generator
generator to start and connect to the bus before it
is considered available (and permitted to stop)
during
again—even if generator management had
previously signaled the generator to stop.
Start Capacity. The percent of generator rated kW of
the running generators that the system allows before the
accumulator to start this generator begins filling. The
Start Capacity is set during commissioning and
should not be changed.
Start Delay. The time to decide to start the generator at
the 10% over capacity. The Start Delay is set during
commissioning and should not be changed.
Stop Capacity. The percent of generator rated kW of
the other running generators that the system allows
before the accumulator to stop this generator begins
filling. The
The
commissioning and should not be changed.
Stop Delay. The time to decide to stop the generator at
10% available capacity. The Stop Delay is set during
commissioning and should not be changed.
Gen Management Modes
The method that generator management uses to
determine the starting and stopping order of the available
generators. All the generators in the system must have
the same setting for this parameter 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. This parameter can be set to one of
the following:
Manual/Fixed. The order of the generators is
D
manually set. In this mode, the order is set once by
the user.
Note: The controllers require that the order be
valid. If two nodes share a common order or
there is a gap in the order sequence, the
controllers will attempt to re-sort the order
until it is valid. If the order is not valid
(automatic re-sorting failed) generator
management will be disabled (all generators
will run all the time).
Management will
Stop Capacity is
Section 1 Specifications
require the
set during
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