Appendix B - Settings and Signals
ORDINAL SIGNAL NAME ELEMENT NAME
DESCRIPTION
Trip on re-close protection is active - indicated TOC delay timer has elapsed after circuit breaker opening, and remains in-service on auto-
reclosure for the duration of the trip on close window
Switch on to fault protection is active - in service on manual breaker closure, and then remains in-service for the duration of the trip on close
window
System checks inactive (output from the check synchronism, and other voltage checks)
DDB input must be high to enable check sync stage 1 logic to operate. Defaults to high if not mapped in PSL; if mapped in PSL must be driven
high.
DDB input must be high to enable check sync stage 2 logic to operate. Defaults to high if not mapped in PSL; if mapped in PSL must be driven
high.
Output from Check Sync logic, when enabled: indicates set conditions for sync check stage 1 are satisfied.
Output from Check Sync logic, when enabled: indicates set conditions for sync check stage 2 are satisfied.
Indicates Bus input is live, i.e. voltage >= setting "Live Bus"
Indicates Bus input is dead, i.e. voltage < setting "Dead Bus"
Indicates Line input is live, i.e. voltage >= setting "Live Line"
Indicates Line input is dead, i.e. voltage < setting "Dead Line"
Pole dead logic detects 3 phase breaker open
Pole dead logic detects at least one breaker pole open
DDB_SYNC_CTRL_SYS_CHECK_OK
Input to the circuit breaker control logic to indicate manual check synchronization conditions are satisfied
External check-sync is OK
Circuit breaker is open, all three phases
Circuit breaker A phase is open
Circuit breaker B phase is open
Circuit breaker C phase is open
Circuit breaker is closed, all three phases
Circuit breaker A phase is closed
Circuit breaker B phase is closed
Circuit breaker C phase is closed
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