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345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
S4 CONTROLS
CHAPTER 6: SETPOINTS
Figure 36: Logic Element logic diagram
SE
TP
OINT
TRIGGER
SOUR
CE
1
Off
TRIGGER
SOUR
CE
2
Off
TRIGGER
SOUR
CE
3
Off
SE
TP
OINT
BL
OCK
1
Off
BL
OCK
2
Off
BL
OCK
3
Off
AND
PKP
TIME
DEL
AY
SE
TP
OINT
t
RST
LE1
ASSER
TED
ST
A
TE
SE
TP
OINT
t
PKP
Off
On
RST
TIME
DEL
AY
LED:
PICK
UP
SE
TP
OINT
LOGIC
EL
FUNCTION
Disabled
=
0
Latched
Alarm
LED:
AL
ARM
Alarm
OR
OR
AND
RESE
T
Command
Trip
AND
AND
Contr
ol
S
R
LA
TC
H
SE
TP
OINTS
Operate
output
relays
upon
selection
OUTPUT
REL
AY
4
OUTPUT
REL
AY
5
OUTPUT
REL
AY
6
OUTPUT
REL
AY
3
LED:
TRIP
Logic
Elem
1O
P
Event
Recor
der
Transient
R
ecor
der
897816A1.
cdr
TRIGGER
LOGIC
SE
TP
OINT
AND
OR
BL
OCK
LOGIC
SE
TP
OINT
AND
OR
Logic
Elem
1D
P
O
Logic
Elem
1
PKP
Operate
Output
R
elay1
(TRIP)
Message