Appendix B - Settings and Signals
ORDINAL SIGNAL NAME ELEMENT NAME
DESCRIPTION
DDB mapped in PSL from opto input (Bus VT secondary MCB tripped or VT fail detected by external VTS scheme), or signal from host relay VTS
scheme
DDB mapped in PSL from opto input (external signal to inhibit Live Line function)
DDB mapped in PSL from opto input (external signal to inhibit Dead Line function)
DDB mapped in PSL from opto input (external signal to inhibit Live Bus function)
DDB mapped in PSL from opto input (external signal to inhibit Dead Bus function)
CB In Service (can be initiated for autoreclose)
CB not available for autoreclose
A Ph trip & AR initiation memory
B Ph trip & AR initiation memory
C Ph trip & AR initiation memory
Any AR initiation signal present
DDB_SEQ_COUNT_GREATER_THAN_SHOTS
Sequence counts greater than AR Shots settings
If a single phase fault evolves to a multi-phase fault during the single phase dead time, this DDB indicates the fault has evolved and that
SPAR will be stopped and 3PAR started.
CB AR failed due to persistent fault
Enabling condition for any dead time
Output DDB indicates conditions to enable single phase autoreclose dead time to run are satisfied
Output DDB indicates conditions to enable three phase autoreclose dead time to run are satisfied
Indicates single phase autoreclose dead time running
OK to start 3PAR dead time
3Phase dead time 1 running
3Phase dead time 2 running
3Phase dead time 3 running
3Phase dead time 4 running
Indicates three phase autoreclose dead time running
Indicates Auto Close signal has been issued
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