8-40
Application
BE1-951
NEUTRAL
TOC
(51N)
51NT
51NPU
PHASE
IOC
(50TP)
50TPT
50TPPU
NEUTRAL
IOC
(50TN)
50TNT
50TNPU
NEG SEQ
IOC
(50TQ)
50TQT
50TQPU
PHASE
TOC
(51P)
51PT
51PPU
IN4 TEST MODE
OPTO
IN3 FEEDER BACKUP
OPTO
IN2 BLOCK INST
OPTO
IN1
OPTO
OUTA
OUTPUT
LOGIC
CO-OUTx
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
D2848-14
04-01-99
BLK
BLK
BLK
BLK
BLK
0
6
6
VO8 51TRIP
VO9 50TRIP
VO11 PROT TRIP
VO1 52TC
VOA ALARM
VO2 52CC
VO3 EXTERNAL BFI SIGNAL
VO4 BUS FAULT TRIP (86B)
VO5 FEEDER BU TRIP (94)
Note: For clarity, multiple variables going
to the same OR Gate are shown by a
single line into the OR Gate.
3
3
VO12 PROT PU
343 TEST MODE
CO-343
243
CO-243
143
CO-143
43
CO-43
ACTIVE
SETTING
GROUP
CONTROL
MODE 2
SG3
SG1
SG2
SG0
AUTO
D3
D2
D1
D0
0
0
0
0
VO13 FEEDER BU MODE
VO15 TEST MODE
0
NORMAL MODE
CO-101
101T
101C
101SC
NEG SEQ
TOC
(51Q)
51QT
51QPU
BLK
0
Figure 8-10.
BUS Logic Diagram
Courtesy of NationalSwitchgear.com