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.
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).
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.
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