Output
Purpose
Output Description
Variable
Label
State Labels
TRUE (1)
FALSE (0)
BE1-951
Application
8-5
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
None
VO6
TRUE
FALSE
BESTlogic Expression: VO6 = 0
VO7
None
VO7
TRUE
FALSE
BESTlogic Expression: VO7 = 0
VO8
None
VO8
TRUE
FALSE
BESTlogic Expression: VO8 = 0
VO9
None
VO9
TRUE
FALSE
BESTlogic Expression: VO9 = 0
VO10
None
VO10
TRUE
FALSE
BESTlogic Expression: VO10 = 0
VO11
Protective Trip
Expression.
TRUE when any 50 or 51 element
times out.
PROT_TRIP
TRIP
NORMAL
BESTlogic Expression: VO11 = 50TPT+50TNT+50TQT+51PT+51NT+51QT
VO12
Protection Picked Up
Expression.
TRUE when any 50 or 51 element
picks up.
PROT_PU
PU
NORMAL
BESTlogic Expression: VO12 = 51PPU +51NPU+51QPU
VO13
Alarm Mask 21.
VO13
TRUE
FALSE
BESTlogic Expression: VO13 = 0
VO14
Alarm Mask 22.
VO14
TRUE
FALSE
BESTlogic Expression: VO14 = 0
VO15
Alarm Mask 23.
VO15
TRUE
FALSE
BESTlogic Expression: VO15 = 0