BE1-951
Application
8-13
NEUTRAL
TOC
(51N)
51NT
51NPU
PHASE
IOC
(150TP)
150TPT
150TPPU
NEUTRAL
IOC
(150TN)
150TNT
150TNPU
NEG SEQ
IOC
(150TQ)
PHASE
IOC
(50TP)
50TPT
50TPPU
NEUTRAL
IOC
(50TN)
50TNT
50TNPU
NEG SEQ
IOC
(50TQ)
50TQT
50TQPU
PHASE
TOC
(51P)
51PT
51PPU
NEG SEQ
TOC
(51Q)
51QT
51QPU
IN4 N & Q ENABLE
OPTO
IN3 RECLOSE INITIATE
OPTO
IN2 DTL
OPTO
IN1 52B
OPTO
143
343
43
OUT1
OUTPUT
LOGIC
CO-OUTx
OUT2
OUTPUT
LOGIC
CO-OUTx
OUT3
OUTPUT
LOGIC
CO-OUTx
OUT4
OUTPUT
LOGIC
CO-OUTx
OUTPUT
LOGIC
OUT5
CO-OUTx
D2848-19
04-08-99
CO-343
CO-243
CO-143
CO-43
243
ACTIVE
SETTING
GROUP
CONTROL
AUTO
SG0
SG2
SG1
SG3
BLK
BLK
0
BLK
BLK
BLK
BLK
BLK
0
0
BLK
BLK
0
150TQT
150TQPU
WAIT
VO8 79RI
AUTO
D3
D2
D1
D0
VO1 52TC
VO2 52CC
VO3
VO4 MINOR ALARM
VO5 MAJOR ALARM
Note: For clarity, multiple variables going to the same OR
Gate are shown by a single line into the OR Gate.
79
RE-
CLOSER
RI
DTL/BLK
STATUS
79RNG
79F
79LO
79SCB
79C
VOA ALARM
OUTA
OUTPUT
LOGIC
CO-OUTx
ALMMAJ
ALARMS
ALMMIN
0
VO11 PROT TRIP
9
VO9 DTL
HIGH SET
9
VO12 PROT PU
Figure 8-3.
OC-W-79 Logic Diagram
Courtesy of NationalSwitchgear.com