Basler BE1-951 - Page 249

9328900990 Rev L BE1-951 Application 8-37
Table 8-20. BUS Virtual Output Logic
State Labels
Output Purpose Description Label
True False
VOA
(OUTA)
Alarm Output Contact.
Alarm contact closes/opens
(refer to style number)
automatically when relay trouble
alarm occurs.
ALARM ACTIVE NORMAL
BESTlogic Expression: VOA=0
VO1
(OUT1)
Bus Breaker Trip.
Trip for bus breaker virtual
control switch trip OR for 51 trip
when in Normal mode.
BKR_TRIP TRIP NORMAL
BESTlogic Expression: VO1=101T+VO8*SG0
VO2
(OUT2)
Bus Breaker Close.
Close breaker when virtual
breaker control switch is
operated to close.
BKR_CLOSE CLOSE NORMAL
BESTlogic Expression: VO2=101C
VO3
(OUT3)
External Breaker Failure
Relay BFI.
Initiate external Breaker Failure
Relay for Bus Timed-
Overcurrent trip when in Normal
mode.
EXT-BFI-03 BFI NORMAL
BESTlogic Expression: VO3=VO8+/VO15*SG0
VO4
(OUT4)
Bus Fault Trip (86B).
Trip bus breaker for bus faults
(50TPT, 50TNT, or 50TQT)
when in Normal mode.
BUS_TRIP TRIP NORMAL
BESTlogic Expression: VO4=VO9*SG0
VO5
(OUT5)
Feeder Breaker Trip.
Trip feeder breaker via auxiliary
relay (94) for timed (51) or
instantaneous (50) trip when in
Feeder Relay Backup mode.
FEEDER_TRP TRIP NORMAL
BESTlogic Expression: VO5=VO11*SG1
VO6 N/A N/A VO6 TRUE FALSE
BESTlogic Expression: VO6=0
VO7 N/A N/A VO7 TRUE FALSE
BESTlogic Expression: VO7=0
VO8 Time Overcurrent Trip.
TRUE when any time
overcurrent element trips.
51_TRIP TRIP NORMAL
BESTlogic Expression: VO8=51PT+51NT+51QT
VO9
Instantaneous
Overcurrent Trip.
TRUE when any instantaneous
overcurrent element trips.
50_TRIP TRIP NORMAL
BESTlogic Expression: VO9=50TPT+50TNT+50TQT
VO10 N/A N/A VO10 TRUE FALSE
BESTlogic Expression: VO10=0
VO11
Protective Trip
Expression.
TRUE when any 50 or 51
element times out.
PROT_TRP TRIP NORMAL
BESTlogic Expression: VO11=50TPT+50TNT+50TQT+51PT+51NT+51QT