Kohler EKOZD Series Service page 164

Live Bus Closure:
The Decision-Makerr 3500 controller monitors the
following to determine if it is safe to close the paralleling
breaker to a live bus:
Voltage and frequency of the paralleling bus as
D
measured by the paralleling bus sensing
connections to the controller. The paralleling bus
voltage must be within the validity window (same as
the generator).
The difference between the RMS voltage of the
D
parallelling bus and the RMS voltage of the
generator. The controller will not signal the breaker
to close while the generator differs from the bus
voltage by more than the Voltage Match Window
threshold.
The difference between the frequency of the
D
paralleling bus and the frequency of the
generator. The controller will not signal the breaker
to close unless the generator frequency is within the
Frequency Match Window of the frequency of the
paralleling bus.
The Phase Difference between the generator and
D
the paralleling bus. The controller will not signal the
breaker to close unless the phase angle between the
generator output and the bus output is within the
Phase Match Window (positive or negative).
The Phase Rotation of the generator and the
D
paralleling bus. The phase rotation (ABC or CBA) of
the generator must match the phase rotation of the
paralleling bus in order for the controller to initiate
active synchronization or to signal the paralleling
breaker to close.
164 Section 9 Component Testing and Adjustment
System configuration parameters:
D
Synch Mode in Auto
D
If the generator is operating in Auto Mode (the LED
above the Auto button is illuminated), this
parameter must be set to one of the following for
the controller to signal the breaker to close:
d
d
Synch Mode in Run
D
If the generator is operating in the Run Mode (the
LED above the Run button is illuminated), this
parameter must be set to one of the following for
the controller to signal the breaker to close:
d
d
Passive
The controller is not changing
the speed or voltage bias for
the generator but will signal
the breaker to close if the
voltage, frequency, phase,
and phase rotation all match
the paralleling bus.
Active
The controller controls the
speed and voltage of the
generator to match phase,
voltage and frequency with the
parallelling bus, the breaker is
signaled to close if the voltage,
frequency, phase, and phase
rotation all match
parallelling bus.
Passive
The controller is not changing
the speed or voltage bias for
the generator but will signal
the breaker to close if the
voltage, frequency, phase,
and phase rotation all match
the paralleling bus.
Active
The controller controls the
speed and voltage of the
generator to match phase,
voltage and frequency with the
paralleling bus, the breaker is
signaled to close if the voltage,
frequency, phase, and phase
rotation all match
paralleling bus.
TP-6953
the
the
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