Single-line diagram
To add an externally controlled bus tie breaker to the single-line diagram:
1. In PICUS, under
Configure > Single-line
, drag the
BTB icon
to the right place on the single-line
diagram.
2. Select
External
, then select a controller from the list. The external breaker feedback digital inputs must
be connected to this controller.
a. Optional: You can add one or more redundant breaker feedbacks for the external bus tie breaker.
Select the externally controlled bus tie breaker on the single-line diagram, and select a controller to
provide the redundant breaker feedback under
Redundant breaker feedback #
.
3. Broadcast the changes to all the controllers in the system.
•
If needed, you can override the controller ready status.
You can assign up to four external breakers (these can be bus tie breakers and/or shore connections) or redundant breaker
feedbacks to each controller (but only three external breakers to an EMERGENCY genset controller).
Each external bus tie breaker creates a new section on the single-line diagram.
Additional equipment
You should install a check sync relay or a paralleling relay in the switchboard to check the synchronisation before closing, for
example, the DEIF CSQ-3 or HAS.
Wiring example
More information
See
Wiring for controller functions
,
Breaker wiring
in the
Installation instructions
for an example of external breaker
wiring.
Inputs and outputs
Assign the externally controlled bus tie breaker inputs in the chosen controller under
Configure > Input/output
. Select the hardware
module, then select the digital input or digital output to configure.
Table 7.22
Hardware required in addition to the minimum standard controller wiring
Function
I/O
Type
Details
Breakers > Breaker feedback # > Feedback >
Breaker # feedback closed*
Digital input Continuous
The feedback ensures that the controller system
knows when the external breaker is closed.
Breakers > Breaker feedback # > Feedback >
Breaker # feedback open*
Digital input Continuous
The feedback ensures that the controller system
knows when the external breaker is open.
Table 7.23
Optional hardware
Function
I/O
Type
Details
Breakers > Breaker feedback # > State > Breaker # feedback is
open*
Digital output Continuous Activated when the breaker is open.
Breakers > Breaker feedback # > State > Breaker # feedback is
closed*
Digital output Continuous
Activated when the breaker is
closed.
*Note: # represents the external breaker number. Up to four external breakers can be assigned to a controller.
How to use the externally controlled bus tie breaker
To close the externally controlled bus tie breaker, the operator must put the system under switchboard control. The operator must
then manually synchronise the busbar sections and then manually close the external breaker.
DESIGNER'S HANDBOOK 4189340911K UK
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