32 TP-7044 6/23
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 and Sync Time 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.
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.
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.
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