5.5.10 Breaker configuration failure
This alarm blocks breaker operation if the breaker is not properly configured. The alarm is activated if a breaker is present on the
Single-line diagram, but the Input/output functions that are required for the breaker type are not fully configured.
This alarm is always enabled, and has the alarm action Block, Latch enabled. You cannot see or change the parameters for this
alarm.
5.5.11 Any tie breaker position failure
This alarm is for tie breaker position failure.
The alarm is based on the tie breaker feedback
signals, which are digital inputs to the controller.
The alarm is activated if the breaker Closed and
Open feedbacks are both missing for longer than
the delay time. The alarm is also activated if the
breaker Closed and Open feedbacks are both
present for longer than the delay time.
The alarm is activated in ALL of the controllers in
the sections connected to the tie breaker.
0
1
Breaker
open
feedback
Time
Delay
Breaker
closed
feedback
Breaker
position
OK
0
1
0
1
0
1
Breaker
open
feedback
Time
Delay
Breaker
closed
feedback
Breaker
position
OK
0
1
0
1
This alarm is always enabled. The alarm action is Warning. The parameters for this alarm are not visible.
All affected controllers under switchboard control
If the Any tie breaker position failure alarm is activated, the controller cannot be sure whether the breaker is open or closed. The
power management system therefore forces ALL of the controllers in the sections connected to the tie breaker under switchboard
control. The controllers remain under switchboard control until the position failure is fixed.
INFO
This alarm is only activated if the controller is in contact with the tie breaker's controller.
DESIGNER'S HANDBOOK 4189340911K UK Page 166 of 521
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