Each BUS TIE breaker controller and each externally controlled breaker creates a new busbar section.
More information
See
Power management
,
Power management principles
,
Busbar sections
for more information about busbar sections.
12.2.2 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.
Busbar A nominal settings
Configure these nominal settings under
Configure > Parameters > Busbar A > Nominal settings > Nominal settings #
, where #
is 1 to 4.
Table 12.1
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 busbar A.
Current (I)
1 A to 9 kA
867 A
The maximum current flow in one phase (that is, L1, L2 or L3) in busbar A
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 for the bus tie breaker. Ignored if
P nominal
calculated
is selected.
Apparent power (S) 1 kVA to 1 GVA
530 kVA
The nominal apparent power for the bus tie breaker. Ignored if
S nominal
calculated
is selected.
Power factor (PF)
0.6 to 1
0.9
The nominal power factor at the bus tie breaker.
*Note: In a single-phase set up the nominal AC voltage is phase-to-neutral.
Configure the nominal settings calculation method under
Configure > Parameters > Busbar A > Nominal settings > Nominal
settings # > Calculation method
, where # is 1 to 4.
Table 12.2
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 B nominal settings
Configure these nominal settings under
Configure > Parameters > Busbar B > Nominal settings > Nominal settings #
, where #
is 1 to 4.
DESIGNER'S HANDBOOK 4189340911K UK
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