9328900990 Rev L BE1-951 Application 8-41
State Labels
Input Purpose Name Label
Energized De-Energized
IN3
Initiates breaker failure (BFI) by external
relays.
EXT-BFI BFI-INI NORMAL
IN4
Places the relay in test mode so that
breaker failure is disabled when IN4 is de-
energized.
TESTDISABL NORMAL TSTMODE
Table 8-22. BACKUP Function Block Logic
Function Purpose
BESTlogic
Expression
Mode
Setting
50TP
Requires 18-20 cycle coordination delay since no blocking is
provided for feeder relay pickup. Used for backup bus fault trip.
0 1 (enabled)
50TN
Requires 18-20 cycle coordination delay since no blocking is
provided for feeder relay pickup. Used for backup bus fault trip.
0
1 (3 Phase
Residual)
50TQ
Requires 18-20 cycle coordination delay since no blocking is
provided for feeder relay pickup. Used for backup bus fault trip.
0 1 (enabled)
150TP
Used for fault detector supervision of external BFI. Since this
isn’t used for tripping, the SG-TARG command should not be
used to enable this function.
0 1 (enabled)
150TN
Used for fault detector supervision of external BFI. Since this
isn’t used for tripping, the SG-TARG command should not be
used to enable this function.
0 1 (enabled)
150TQ
Used for fault detector supervision of external BFI. Since this
isn’t used for tripping, the SG-TARG command should not be
used to enable this function.
0 1 (enabled)
51P N/A 0 1 (enabled)
51N N/A 0
1 (3 Phase
Residual)
51Q N/A 0 1 (enabled)
151N N/A 0 0 (disabled)
24 N/A 0 0 (disabled)
27P N/A 0 0 (disabled)
27X N/A 0 0 (disabled)
59P N/A 0 0 (disabled)
159P N/A 0 0 (disabled)
159X N/A 0 0 (disabled)
47 N/A 0 0 (disabled)
25 N/A 0 0 (disabled)
81 N/A 0 0 (disabled)
181 N/A 0 0 (disabled)
281 N/A 0 0 (disabled)
381 N/A 0 0 (disabled)
481 N/A 0 0 (disabled)
581 N/A 0 0 (disabled)
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