CHAPTER 6: SETPOINTS
S4 CONTROLS
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
6–121
Figure 42: Logic Element logic diagram
SETPOINT
TRIGGER
SOURCE
1
Of
f
TRIGGER
SOURCE
2
Of
f
TRIGGER
SOURCE
3
Of
f
SETPOINT
BLOCK
1
Of
f
BLOCK
2
Of
f
BLOCK
3
Of
f
AND
PKP
TIME
DELA
Y
SETPOINT
t
PKP
t
RST
LE1
ASSER
TED
ST
A
TE:
SETPOINT
t
PKP
Of
f
On
Event
Recorder
T
ransient
Recorder
SETPOINT
OUTPUT
RELA
Y
4
OUTPUT
RELA
Y
5
OUTPUT
RELA
Y
6
OUTPUT
RELA
Y
3
RST
TIME
DELA
Y
Logic
Elem1
OP
Logic
Elem1
PKP
LED:
PICKUP
Message
SETPOINT
LOGIC
EL
FUNCTION
Disabled
=
0
Latched
Alarm
Operate
Output
Relay
1
(TRIP)
LED:
ALARM
LED:
TRIP
Alarm
OR
OR
AND
RESET
Command
T
rip
AND
AND
Control
S
R
LA
TCH
898755A1.cdr
Logic
Elem1
DPO
t
PKP
TRIGGER
LOGIC
SETPOINT
AND
OR
t
PKP
BLOCK
LOGIC
SETPOINT
AND
OR
Operate
output
relays
upon
selection