Appendix B - Settings and Signals
ORDINAL SIGNAL NAME ELEMENT NAME
DESCRIPTION
To enable SOTF logic by an external pulse. When this input is energized by en external pulse, SOTF becomes enabled during “SOTF Pulse”
time setting
Any trip signal - can be used as the trip command in three-pole tripping applications
Trip signal for phase A - used as a command to drive trip A output contact(s). Takes the output from the internal trip conversion logic
Trip signal for phase B - used as a command to drive trip B output contact(s). Takes the output from the internal trip conversion logic
Trip signal for phase C - used as a command to drive trip C output contact(s). Takes the output from the internal trip conversion logic
Trip signal for 3ph - used as a command to drive trip 3ph output contact(s). Takes the output from the internal trip conversion logic
2 or 3 phase fault indication - used to flag whether the fault is polyphase. Typically used to control auto-reclose logic, where auto-reclosing
is allowed only for single phase faults
3 phase fault indication. Typically used to control auto-reclose logic, where auto-reclosing is blocked for faults affecting all three phases
together
3 phase fault indication. Typically used to control auto-reclose logic, where auto-reclosing is blocked for faults affecting all three phases
together
Trip 3 phase - input to trip latching logic
A phase trip - input to trip conversion logic. Essential to ensure correct single or three pole trip command results (e.g. converts a 2 pole trip to
3 phase)
B phase trip - input to trip conversion logic. Essential to ensure correct single or three pole trip command results (e.g. converts a 2 pole trip to
3 phase)
C phase trip - input to trip conversion logic. Essential to ensure correct single or three pole trip command results (e.g. converts a 2 pole trip to
3 phase)
External DDB input to host protection trip conversion logic to force 3 Pole tripping of CB for all faults
External trip 3 phase - allows external protection to initiate breaker fail, circuit breaker condition monitoring statistics, and internal auto-
reclose (if enabled)
External trip A phase - allows external protection to initiate breaker fail, circuit breaker condition monitoring statistics, and internal auto-
reclose (if enabled)
External trip B phase - allows external protection to initiate breaker fail, circuit breaker condition monitoring statistics, and internal auto-
reclose (if enabled)
External trip C phase - allows external protection to initiate breaker fail, circuit breaker condition monitoring statistics, and internal auto-
reclose (if enabled)
Setting group selector X1 (low bit)-selects SG2 if only DDB 542 signal is active.
SG1 is active if both DDB 542 & DDB 543=0
SG4 is active if both DDB 542 & DDB 543=1
Setting group selector 1X (high bit)-selects SG3 if only DDB 543 is active.