CHAPTER 6: SETPOINTS
S3 PROTECTION
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
6–47
Figure 6-20: Phase directional logic diagram
898840.cdr
SETPOINT
BLOCK
1:
Of
f=
0
BLOCK
2:
Of
f=
0
BLOCK
3:
Of
f=
0
OR
Ph Dir OC REV
(A
)
(T
o Phase IOC
1,
2
and
TO
C
)
SETPOINT
:
Do Not Operate, Operate
OUTPUT
RELA
Y X
SETPOINT
PH
DIR MT
A
Ia
>
0.
05
x CT
AND
AND
ACTUAL
V
ALUES
Ia
Seq
=
ABC
Seq
=
ACB
Vbc
Vcb
Voltage Polarization
Vpol
FWD
REV
RUN
SETPOINT
PHASE DIR OC POLAR VOL
TAGE
TRESHOLD
V>
=
V
minimum
SETPOINT
BLK P
OC DIR UNDEF
Enabled
Disabled
PHASE B LOGIC SIMILAR
TO
PHASE
A
PHASE C LOGIC SIMILAR
TO
PHASE
A
AND
AND
BLK
PH
OC DIR UND
(A
)
(T
o Phase IOC
1,
2
and
TO
C
)
(Message
)
SETPOINT
PHA
DIR FUNCTION
:
Disabled
=
0
Latched
Alarm
Alarm
OR
Control
OR
AND
RESET
AND
S
R
LA
T
C
H
Ph Dir OC FWD
(A
)
(T
o Phase IOC
1,
2
and
TO
C
)
(Message
)
(Flexlogic
)
AND
(Event Recorder
,T
rasient
Recorder
)
(Flexlogic
)
(Event Recorder
,T
rasient
Recorder
)
898840A1.CDR
