9328900990 Rev L BE1-951 Application 8-5
Table 8-3. BASIC-OC Virtual Switch Logic
State Labels
Switch Purpose Mode Label
True False
43 N/A 0 (Disable) SWITCH_43 CLOSED OPEN
143 N/A 0 (Disable) SWITCH_143 CLOSED OPEN
243 N/A 0 (Disable) SWITCH_243 CLOSED OPEN
343 N/A 0 (Disable) SWITCH_343 CLOSED OPEN
101 N/A 0 (Disable) N/A N/A N/A
Table 8-4. BASIC-OC 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)
Breaker Trip Output.
Contact closes when protective
trip expression is TRUE.
BKR_TRIP TRIP NORMAL
BESTlogic Expression: VO1=VO11
VO2
(OUT2)
Instantaneous Phase OC
Auxiliary Contact.
Contact closes when
instantaneous phase-overcurrent
trip occurs.
50TP_TRIP TRIP NORMAL
BESTlogic Expression: VO2=50TPT
VO3
(OUT3)
Timed Phase OC Auxiliary
Contact.
Contact closes when timed
phase-overcurrent trip occurs.
51P_TRIP TRIP NORMAL
BESTlogic Expression: VO3=51PT
VO4
(OUT4)
Instantaneous Neutral and
Negative-Sequence OC.
Contact closes when
instantaneous neutral or
instantaneous negative-sequence
overcurrent condition occurs.
INST_N&Q TRIP NORMAL
BESTlogic Expression: VO4=50TNT+50TQT
VO5
(OUT5)
Timed Neutral and
Negative-Sequence OC.
Contact closes when timed
neutral or timed negative-
sequence overcurrent condition
exists.
51N&QTRP TRIP NORMAL
BESTlogic Expression: VO5=51NT+51QT
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 N/A N/A VO8 TRUE FALSE
BESTlogic Expression: VO8=0