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CHAPTER 6: SETPOINTS
S3 PROTECTION
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
6–95
Figure 30: Phase Overvoltage logic diagram
Phase
V
oltage
Inputs
(associated
setpoints)
SETPOINTS
Va
b
SETPOINT
PH
OV
FUNCTION:
Disabled
=
0
Latched
Alarm
PH
OV
PICKUP:
AND
Vbc
Vca
Operate
Output
Relay
1
(TRIP)
Event
Recorder
T
ransient
Recorder
LED:
TRIP
Alarm
OR
OR
AND
SETPOINTS:
Operate
output
relays
upon
selection
OUTPUT
RELA
Y
4
OUTPUT
RELA
Y
5
OUTPUT
RELA
Y
6
OUTPUT
RELA
Y
3
T
rip
AND
T
rip
(T
o
Breaker
Failure)
SETPOINTS
BLOCK
1:
O
ff=0
BLOCK
2:
O
ff=0
BLOCK
3:
O
ff=0
OR
RUN
RUN
RUN
Va
n
Vbn
Vcn
None
Delta
Wy
e
LED:
PICKUP
Event
Recorder
T
ransient
Recorder
Phase
Overvoltage
Message
V
a
>
PICKUP
Vb
>
PICKUP
Vc
>
PICKUP
All
Three
Operate
for
programmed
combination
Any
T
w
o
Any
One
SETPOINT
PH
OV
PHASES:
OR
PHASE
OV
DELA
Y:
SETPOINT
t
PKP
LED:
ALARM
RESET
Command
AND
S
R
LA
TCH
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