Kohler 500EOZCS Operation page 27

Sync Mode In Auto. This should be set to Active before
leaving the vessel when commissioning or testing is
complete, but can be used to keep the controller from
closing the paralleling breaker/contactor to complete a
test or to take a generator out of service. Setting the
Sync Mode to OFF will disable the synchronizer, the
paralleling breaker/contactor will not close with the
synchronizer disabled. To remove a generator from
service manually, set the Sync Mode in Auto to OFF, wait
for any additional generators to start, and set the Load
Enable to OFF. When the breaker/contactor trips, stop
the generator by pressing the OFF button, then set the
Sync Mode back to Active and the Load Enable back to
ON.
Note: Pressing the OFF button will also disconnect the
generator from the paralleling bus, but it will not
give the other generators any opportunity to
negotiate an arrangement to support the load.
Even if there are enough generators online to
support the load, the voltage and frequency may
dip when the other running generators are
required to pick up the load formerly supported by
this generator.
Sync Mode In Run. The default setting for this
parameter is Check. In Check mode, the controller will
close the paralleling breaker/contactor to a dead bus (no
other generators supplying the load) but will hold
synchronism with the bus without closing the paralleling
breaker/contactor if it is already supplied by another
generator. This allows operational verification of the
synchronizer, but does not allow the generator to supply
the load. If the generator system is to be operated with
the engine control switch in Run, the Sync Mode in Run
may need to be set to Active.
Note: System Start (AUTO-RUN) is the preferred
method of operating a generator system. RUN is
intended for testing or verification only.
Note: Sync Mode in Auto and Sync Mode in Run can
also be found on the Synchronizing Setup
screen.
TP-7126 5/20
Synchronizing Setup
This screen is primarily used to configure the
synchronizer. There is a lot of metering information that
can be accessed on this screen, but the parameters
should be adjusted only during commissioning.
Volts-Hz OK. The voltage and frequency have been
within the acceptable window for the Volts-Hz OK Delay.
In Sync. The frequency, voltage and phase rotation of
the generator have matched that of the bus and the
generator and bus have been in phase for the duration
of the dwell timer. This value is only updated when the
controller is synchronizing (Synch Mode = Active,
Passive or Check, breaker/contactor is open, generator
is running).
Voltage Matched. The difference between the
generator voltage and the bus voltage is within the
acceptable window. This value is only updated when the
controller is synchronizing (Synch Mode = Active,
Passive or Check, breaker/contactor is open, generator
is running).
AVG Bus Voltage L-L. The average voltage of the
paralleling bus.
AVG Gen Voltage L-L. The average voltage of this
generator.
Voltage Bias. The amount that the controller is
attempting to adjust the output voltage
(100% bias = +10% on the output voltage, -100% =
-10% on the output voltage).
The controller adjusts the Voltage Bias to match the
generator voltage to the bus voltage
Frequency Matched. The difference between the
generator frequency and the bus frequency is within the
acceptable window. This value is only updated when the
controller is synchronizing (Synch Mode = Active,
Passive or Check, breaker/contactor is open, generator
is running).
Section 1 Specifications 27