Figure 7.4
Example of a ring busbar
Bus tie
breaker 3
Bus tie
breaker 1
BUS TIE
breaker
controller
BUS TIE
breaker
controller
Externally controlled
bus tie breaker
Section 1
Section 2
Section 3
Section 4
Busbar A
Busbar B
Busbar A
Busbar B
Bus tie
breaker 2
BUS TIE
breaker
controller
Busbar A
Busbar B
Single-line diagram
To configure a ring busbar:
1. Go to
Configure > Single-line
.
2. Select the whole single-line diagram.
3. Under
Component configuration
, enable
Ring busbar
.
INFO
A ring busbar connection is only allowed if there are at least two bus tie breakers in the single-line diagram. These bus tie
breakers can be controlled by BUS TIE breaker controllers and/or externally controlled.
Parameters
Configure this parameter under
Configure > Parameters > System power management > Bus tie breaker > Closed ring
.
Parameter
Range
Default
Comment
Close last BTB in a
ring allowed
Not enabled,
Enabled
Not enabled
Not enabled
: The power management system (PMS) does not allow the last
open bus tie breaker to close to create a ring busbar. If the operator presses
the close button, then an info message appears on the display unit.
Enabled
: The PMS allows the last open bus tie breaker to close to create a
ring busbar.
CAUTION
If externally controlled bus tie breaker(s) are present in the system and these are open, then the PMS can close all the bus
tie breakers controlled by the BUS TIE breaker controller, even though
Not enabled
is selected under
Close last BTB in a
ring allowed
. After this, it is possible to manually close the externally controlled bus tie breaker(s) and create a ring, even
though
Not enabled
is selected under
Close last BTB in a ring allowed
.
INFO
If all the bus tie breakers in a ring are closed, and the operator presses the open button for a BUS TIE breaker controller,
then that bus tie breaker opens without de-loading.
7.1.5 Local power management
Local power management parameters only apply to one controller. They are configured under
Configure > Parameters > Local
power management
. These parameters do not affect any other controllers in the system.
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