Parameter Range Default Notes
Open point enabled Not enabled, Enabled Not enabled
Not enabled: The SGB may open at any load.
Enabled: The SGB will not open if the load on the breaker
is more than Open when power below.
Open when power below
2 to 100 % of nominal
power
5 %
Configure these parameters under Configure > Parameters > Local power management > Shaft generator PTH mode >
Connect load.
Parameter
Range Default Notes
PTH connect load 1 kW to 900 MW 100 kW The minimum available power required when the SGB closes.
For PTH the shaft generator breaker synchronisation parameters can be different from the normal shaft generator breaker
synchronisation settings. Configure these parameters under Configure > Parameters > Breakers > Shaft generator breaker
configuration >Synchronisation setting (PTH).
Name
Range Default Comment
Sync. type
• Dynamic
• Static
Dynamic
The synchronisation type to be performed by controller to close the
breaker.
Delta frequency
min.
-0.5 to 0.3 Hz -0.3 Hz
Add Delta frequency min. to the busbar frequency, for the minimum
frequency from the synchronising generator for the breaker to close.
Delta frequency
max.
0.0 to 2.0 Hz 0.1 Hz
Add Delta frequency max. to the busbar frequency, for the maximum
frequency from the synchronising generator for the breaker to close.
Delta frequency max. must always be higher than Delta frequency min.
Delta voltage min.
2 to 10 % of nominal
voltage
5 %
The maximum that the voltage of the synchronising generator may be
below the voltage of the busbar for the breaker to close.
Delta voltage max.
2 to 10 % of nominal
voltage
5 %
The maximum that the voltage of the synchronising generator may be
above the voltage of the busbar for the breaker to close.
Breaker close time 40 to 300 ms 50 ms
The time between when the close breaker signal is sent and when the
breaker actually closes.
Applications
The electricity required for PTH can be supplied by diesel generators, as shown in the following drawing.
The gensets can also be used to provide power for two shaft generators, both running power take home, if required.
DESIGNER'S HANDBOOK 4189340911K UK Page 362 of 521
To Next Page
Loading...
