Appendix B -Settings and Signals
ORDINAL SIGNAL NAME ELEMENT NAME
DESCRIPTION
Initiate tripping of circuit breaker 1 from a manual command
Initiate closing of circuit breaker 1 from a manual command
Initiate tripping of circuit breaker 2 from a manual command
Initiate closing of circuit breaker 2 from a manual command
Reset Manual CB Close Timer Delay (stop & reset Manual Close Delay time for closing CB1).
Reset latched relays & LEDs (manual reset of any lockout trip contacts, auto-reclose lockout, and LEDs)
Reset thermal state to 0%
Reset Lockout Opto Input to reset CB1 Lockout state
Reset CB1 Maintenance values
DDB mapped in PSL from opto or comms input. External signal to force CB1 autoreclose to lockout.
Pole discrepancy (from external detector) - input used to force a 2nd single pole trip to move to a 3 pole auto-reclose cycle
To enable loopback mode via opto input
Inhibit weak infeed aided scheme logic
Commissioning tests - automatically places relay in test mode
For IEC-870-5-103 protocol only, used for "Command Blocking" (relay ignores SCADA commands)
For IEC-870-5-103 protocol only, used for "Monitor Blocking" (relay is quiet - issues no messages via SCADA port)
Inhibit stage 1 overcurrent protection
Inhibit stage 2 overcurrent protection
Inhibit stage 3 overcurrent protection
Inhibit stage 4 overcurrent protection
Inhibit stage 1 earth fault protection
Inhibit stage 2 earth fault protection
Inhibit stage 3 earth fault protection
Inhibit stage 4 earth fault protection
Inhibit stage 1 undervoltage protection
Inhibit stage 2 undervoltage protection
Inhibit stage 1 overvoltage protection
Inhibit stage 2 overvoltage protection
Inhibit stage 2 overvoltage protection
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