Table 12.16 BUS TIE breaker controller inhibits
Inhibit Disables the alarm when ...
Bus tie breaker closed The Breakers > Bus tie breaker > Feedback > BTB Closed digital input is activated.
Bus tie breaker open The Breakers > Bus tie breaker > Feedback > BTB Open digital input is activated.
Controller under SWBD
control
The Mode > Switchboard control digital input is activated, OR a system problem forced the controller
under switchboard control.
ACM wire break
All these conditions are met:
• The bus tie breaker is closed
• Voltage is detected by one set of ACM voltage measurements
• No voltage is detected on a phase, or on all three phases for the other set of ACM voltage
measurements
Inhibit 1 The Alarm system > Inhibits > Activate inhibit 1 digital input is activated.
Inhibit 2 The Alarm system > Inhibits > Activate inhibit 2 digital input is activated.
Inhibit 3 The Alarm system > Inhibits > Activate inhibit 3 digital input is activated.
12.5.4 Breaker alarms
More information
The Breakers, synchronisation and de-loading chapter describes breaker handling and alarms in general.
The following table shows where to configure these alarms for the BUS TIE breaker, as well as which general alarm corresponds to
each BUS TIE breaker alarm.
Table 12.17
Breaker alarm names for the BUS TIE breaker controller
BUS TIE breaker alarm Configure > Parameters > General name
BTB synchronisation failure
Breakers > Bus tie breaker monitoring > Synchronisation
failure
Breaker synchronisation failure
BTB de-load failure Breakers > Bus tie breaker monitoring > De-load failure Breaker de-load failure
Vector mismatch Breakers > Bus tie breaker monitoring > Vector mismatch Vector mismatch
BTB opening failure Breakers > Bus tie breaker monitoring > Opening failure Breaker opening failure
BTB closing failure Breakers > Bus tie breaker monitoring > Closing failure Breaker closing failure
BTB position failure Breakers > Bus tie breaker monitoring > Position failure Breaker position failure
BTB trip (external) Breakers > Bus tie breaker monitoring > Tripped (external) Breaker trip (external)
BTB short circuit Breakers > Bus tie breaker monitoring > Short circuit Breaker short circuit
BTB configuration failure - Breaker configuration failure
Busbar A phase sequence error Busbar A > AC setup > Phase sequence error Phase sequence error
Busbar B phase sequence error Busbar B > AC setup > Phase sequence error Phase sequence error
12.5.5 AC alarms
More information
The AC configuration and nominal settings chapter describes AC alarms in general.
The following tables show where to configure these alarms for the BUS TIE breaker controller, as well as which general alarm
corresponds to each BUS TIE breaker controller alarm.
DESIGNER'S HANDBOOK 4189340911K UK Page 410 of 521
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