9.2.2 EMERGENCY genset controller nominal settings
The controller nominal settings are used in a number of key functions. For example, many protection settings are based on a
percentage of the nominal settings.
Generator nominal settings
Configure these nominal settings under Configure > Parameters > Generator > Nominal settings.
Table 9.1
Controller nominal settings
Nominal setting Range Default Notes
Voltage (V) 10 V to 160 kV 400 V The phase-to-phase* nominal AC voltage for the genset.
Current (I) 1 A to 9 kA 867 A
The maximum current flow in one phase (that is, L1, L2 or L3) from the genset
during normal operation.
Frequency (f) 48 to 62 Hz 50 Hz
The system nominal frequency, typically either 50 Hz or 60 Hz. All the
controllers in the system should have the same nominal frequency.
Power (P) 1 kW to 900 MW 480 kW The nominal active power may be on the genset nameplate.
Apparent power (S) 1 kVA to 1 GVA 530 kVA The nominal apparent power should be on the genset nameplate.
Power factor (PF) 0.6 to 1 0.9 The power factor should be on the genset nameplate.
Note: *The nominal voltage is always phase-to-phase, even when phase-to-neutral measurements are chosen.
Configure this under Configure > Parameters > Generator > Nominal settings > Calculation method:
Table 9.2
Nominal setting calculation method
Calculation method Options Default
Reactive power (Q) nominal
Q nominal calculated
Q nominal = P nominal
Q nominal = S nominal
Q nominal calculated
P or S nominal
No calculation
P nominal calculated
S nominal calculated
No calculation
More information
See AC configuration and nominal settings, Nominal settings, Nominal power calculations for more information.
Busbar nominal settings
Configure these nominal settings under Configure > Parameters > Busbar > Nominal settings.
Table 9.3
Controller nominal settings
Nominal setting Range Default Notes
Voltage (V) 10 V to 160 kV 400 V
The phase-to-phase nominal voltage for the busbar. If there are no transformers
between the genset and the busbar, the nominal voltage for the busbar will be the
same as the nominal voltage for the genset.
Frequency (f) 48 to 62 Hz 50 Hz
The system nominal frequency, typically either 50 Hz or 60 Hz. This should be the
same as the genset nominal frequency, and all the controllers in the system should
have the same nominal frequency.
DESIGNER'S HANDBOOK 4189340911K UK Page 324 of 521
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