Kohler 500EOZCS Operation page 28

Bus Frequency. The operating frequency of the
paralleling bus.
Gen Frequency. The operating frequency of this
generator.
Speed Bias. The amount that the controller is
attempting to adjust the output frequency of the
generator
(100% bias = +5% on the engine speed, -100% = -5% on
the engine speed).
The controller adjusts the Speed Bias to match
frequency and phase with the paralleling bus.
Phase Matched. The phase 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).
Phase Difference. The phase angle between the
generator and the bus.
Note: This value is only accurate if the generator is
running and the bus is energized. The phase
angle must be established between two
waveforms.
Dwell Time Remaining. The remaining time for the
dwell timer in seconds. The generator is considered to
be in Sync when the dwell timer expires. If this value is
resetting to the Dwell Time (directly above it), the
generator is not holding synchronism. This value is only
updated when the controller is synchronizing (Synch
Mode = Active, Passive or Check, breaker/contactor is
open, generator is running).
Sync Time Remaining. The remaining time before the
controller issues a Failure to Synchronize warning. The
Failure to Synchronize warning will cause the generator
management to consider this generator unreliable and
to start another generator (if available). If the system
commissioning has been performed properly, this
warning should only occur if the system is overloaded or
if there is a malfunction on this generator. This value is
only populated when the generator is actively
synchronizing (Sync Mode = Active, breaker/contactor
is open, generator is running).
Note: Dwell Time Remaining
Remaining are not supported on all firmware
versions. If the controller firmware does not
support the time remaining parameters, they will
be populated with N/A.
28 Section 1 Specifications
and Sync Time
Sharing Setup
Bus % of Rated kW. The ratio of the total load on the
bus (sum of the loads on all connected generators) to
the total bus capacity (sum of all the connected
generator capacities), expressed as a percentage. This
value can be monitored to determine system loading
(also found on Bus Metering screen, and Generator
Management screen).
Gen % of Rated kW. The ratio of the total load on this
generator to its rated capacity, expressed as a
percentage. This value can be compared to the Bus % of
Rated kW (directly above it) to determine if the system is
sharing load properly. The acceptable difference
between the generator and bus is site-dependent. The
adjustment of the parameters on this screen (during
commissioning) will determine how closely the
generators share load.
Speed Bias. The amount that the controller is
attempting to adjust the output frequency of the
generator
(100% bias = +5% on the engine speed, -100% = -5% on
the engine speed).
The controller adjusts the speed bias to share load
between the generators connected to the paralleling
bus.
Bus % of Rated kVAR. The ratio of the total reactive
load on the bus (sum of the reactive loads on all
connected generators) to the total bus reactive capacity
(sum of all the connected generator reactive capacities),
expressed as a percentage. This value can be
monitored to determine system loading (also found on
Bus Metering screen). The Reactive Power rating of the
generator is fixed at 3/4 of the rated kW capacity of the
generator (even in single-phase applications).
Gen % of Rated kVAR. The ratio of the total reactive
load on this generator to its rated reactive capacity,
expressed as a percentage. This value can be
compared to the Bus % of Rated kVAR (directly above it)
to determine if the system is sharing reactive load
properly. The acceptable difference between the
generator and bus is site-dependent. The adjustment of
the parameters on this screen (during commissioning)
will determine how closely the generators share reactive
load. The Reactive Power rating of the generator is fixed
at 3/4 of the rated kW capacity of the generator (even in
single-phase applications).
Voltage Bias. The amount that the controller is
attempting to adjust the output voltage of the generator
(100% bias = +10% on the output voltage, -100% =
-10% on the output voltage). The controller adjusts the
voltage bias to share reactive load between the
generators connected to the paralleling bus.
TP-7126 5/20