6–86
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
S3 PROTECTION
CHAPTER 6: SETPOINTS
Figure 6-38: Auxiliary Overvoltage logic diagram
Auxiliary V
oltage Input
(associated setpoints)
SETPOINTS
SETPOINT
AUX OV FUNCTION:
Disabled = 0
Latched
Alarm
AUX OV PICKUP:
AND
Operate Output Relay 1 (TRIP)
Event 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
Aux V
LED: PICKUP
Aux. OV
Trip (Alarm) - PKP
, OP
, DPO
Message
V > PICKUP
AUX OV DELA
Y:
SETPOINT
t
PKP
LED:
ALARM
RESET
Command
AND
S
R
LA
TCH
89801
1A2.cdr