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350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
S3 PROTECTION
CHAPTER 6: SETPOINTS
Figure 6-52: Volts-per-hertz logic diagram
SE
TP
OINTS:
Operate, Do Not Operate
OUTPUT REL
A
Y
X
898864A1.cdr
Pickup
:
SE
TP
OINTS
RUN
Cur
ve
:
TD Multiplier
:
Reset Time
:
Block
1
SE
TP
OINT
Off
=
0
AND
t
V/
H
z
SE
TP
OINTS
FUNCTION
:
Disabled
=
0
Trip
Alarm
Latched Alarm
OR
AND
AND
AND
Operate Output
Relay
1
(TRIP
)
LED
:TRIP
OR
LED
:A
L
ARM
LA
TC
H
S
R
RESE
T
Command
V
oltage Inputs based on V
T setup
WYE
Delta
Va
n
Vbn
Vc
n
Va
b
Vbc
Vc
a
V
T Fr
equency
Actual V
alues
V,
F
V
oltage Mode
:
OR
Block
2
Off
=
0
Block
3
Off
=0
Event Recorder
Transient Recorder
Voltz
/Hz OP
Voltz
/Hz PKP
Voltz
/Hz DPO
LED
:PICK
UP
MAX