![background image](http://html.mh-extra.com/html/ge/350-a9/350-a9_instruction-manual_131787207.webp)
CHAPTER 6: SETPOINTS
S3 PROTECTION
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
6–77
Figure 6-33: 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
Transient Recorder
LED:
TRIP
Alarm
OR
OR
AND
SETPOINTS:
Do Not Operate, Operate
OUTPUT
RELA
Y X
Trip
AND
Trip (T
o Breaker Failure)
SETPOINTS
BLOCK 1:
Of
f = 0
BLOCK 2:
Of
f = 0
BLOCK 3:
Of
f = 0
OR
RUN
RUN
RUN
Va
n
Vbn
Vcn
None
Delta
Wye
LED: PICKUP
Event Recorder
Transient Recorder
Phase Overvoltage
Message
Va
> PICKUP
Vb > PICKUP
Vc > PICKUP
All
Three
Operate for
programmed
combination
Any
Tw
o
Any One
SETPOINT
PH OV PHASES:
OR
PHASE OV DELA
Y:
SETPOINT
t
PKP
LED:
ALARM
RESET
Command
AND
S
R
LA
TCH
898013A1.cdr