GE 850 - Page 529

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
51G
T1
87N
T1
87N
T1
86 T1
63
50P-1 51P-1
50N-1 51N-1
27-1
Time
27-1
Inst
25-1
METERING
94
1
52 a
33
LS
850-1
52 a
25-3
50P-3 51P-3
50N-3 51N-3
27R-1 27R-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)OR3(φ-G)
1(φ-φ or φ-G)
OR 2 (φ-φ)
OR 3 (φ-G)
3
43
Local/Rem
43
Local/Rem
*
*
*
*
= OPTIONAL
43/10
1,2,3
43/83
BLOCK
TRANSFER
SCHEME
LOGIC
Dead
Bus
Dead
Line
(Dead Bus Max Volts )
(Dead Line Max Volts )
*
ΙΙ
2
R
51G
T2
87N
T2
87N
T2
86 T2
63
50P-2 51P-2
50N-2 51N-2
27-2
Time
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)OR3(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)OR3(φ-G)
3
(Remote Sources)
Transformer may
not be present
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