GE Multilin 850, Instruction Manual

Page: 529 / 664

CHAPTER 8: CONTROL BUS TRANSFER
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–57
Figure 8-26: Transfer Scheme One-Line Diagram
Ι
1
3
33
LS
R
51
G
T1
87
N
T1
87
N
T1
86 T1
63
50
P
-1
51
P
-1
50
N
-1
51
N
-1
27
-1
T
ime
27
-1
Inst
25
-1
METERING
94
1
52
a
33
LS
850-1
52
a
25
-3
50
P
-3
51
P
-3
50
N
-3
51
N
-3
27
R
-1
27
R
-2
850-3
V
V
BUS
BUS
LINE
LINE
METERING
V
V
T1
N/
C
N/
O
SOURCE
Ι
*
*
1(
φ
-
φ
or
φ
-G
)
OR
2
(
φ
-
φ
)O
R
3
(
φ
-G
)
1(
φ
-
φ
or
φ
-G
)
OR
2
(
φ
-
φ
)
OR
3
(
φ
-G
)
3
43
Local
/Rem
43
Local
/Rem
*
*
*
*
=
OPTIONAL
43
/1
0
1,
2
,3
43
/8
3
BLOCK
TRANSFER
SCHEME
LOGIC
Dead
Bus
Dead
Line
(Dead Bus Max V
olts
)
(Dead Line Max V
olts
)
*
ΙΙ
2
R
51
G
T2
87
N
T2
87
N
T2
86 T2
63
50
P
-2
51
P
-2
50
N
-2
51
N
-2
27
-2
T
ime
27
-2
Inst
25
-2
METERING
94
2
52
a
33
LS
850-2
V
V
BUS
LINE
T2
N/
C
SOURCE
ΙΙ
*
*
1(
φ
-
φ
or
φ
-G
)
OR
2
(
φ
-
φ
)O
R
3
(
φ
-G
)
1(
φ
-
φ
or
φ
-G
)
OR
2
(
φ
-
φ
)
OR
3
(
φ
-G
)
3
43
Local
/Rem
*
1(
φ
-
φ
or
φ
-G
)
1(
φ
-
φ
or
φ
-G
)
OR
2
(
φ
-
φ
)
OR
3
(
φ
-G
)
2(
φ
-
φ
)O
R
3
(
φ
-G
)
3
(Remote Sources
)
T
ransformer may
not be present
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