GE G60 Instruction Manual page 535
Ur series generator protection system
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- Instruction manual (768 pages) ,
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- Communications manual (526 pages)
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8 THEORY OF OPERATION
Table 8–2: PHASE DISTANCE INPUT SIGNALS FOR WYE-DELTA TRANSFORMERS
TRANSFORMER
LOOP
CONNECTION
Yd1
AB
BC
CA
Yd3
AB
BC
CA
Yd5
AB
BC
CA
Yd7
AB
BC
CA
Yd9
AB
BC
CA
Yd11
AB
BC
CA
GE Multilin
8.1 PHASE DISTANCE THROUGH POWER TRANSFORMERS
CURRENT
TRANSFORMATION
1
------ - 2I
(
)
I
I
I
=
–
–
AB_21P
A
B
C
3
1
------ - 2I
(
)
I
I
I
=
–
–
BC_21P
B
A
C
3
1
------ - 2I
(
)
I
I
I
=
–
–
CA_21P
C
A
B
3
1
------ - I
(
)
I
I
2I
=
+
–
AB_21P
A
B
C
3
1
------ - I
(
)
I
I
2I
=
+
–
BC_21P
B
C
A
3
1
------ - I
(
)
I
I
2I
=
+
–
CA_21P
A
C
B
3
1
------ - 2I
(
)
I
I
I
=
–
–
AB_21P
B
A
C
3
1
I
------ - 2I
(
I
I
)
=
–
–
BC_21P
C
A
B
3
1
I
------ - 2I
(
I
I
)
=
–
–
CA_21P
A
B
C
3
1
I
------ - I
(
I
2I
)
=
+
–
AB_21P
B
C
A
3
1
------ - I
I
(
I
2I
)
=
+
–
BC_21P
A
C
B
3
1
------ - I
I
(
I
2I
)
=
+
–
CA_21P
A
B
C
3
1
------ - 2I
(
)
I
I
I
=
–
–
AB_21P
C
A
B
3
1
------ - 2I
(
)
I
I
I
=
–
–
BC_21P
A
B
C
3
1
------ - 2I
(
)
I
I
I
=
–
–
CA_21P
B
A
C
3
1
------ - I
(
)
I
I
2I
=
+
–
AB_21P
A
C
B
3
1
------ - I
(
)
I
I
2I
=
+
–
BC_21P
A
B
C
3
1
------ - I
(
)
I
I
2I
=
+
–
CA_21P
B
C
A
3
G60 Generator Protection System
VOLTAGE
TRANSFORMATION
V
3V
=
AB_21P
A
V
3V
=
BC_21P
B
V
3V
=
CA_21P
C
V
3V
=
–
AB_21P
C
V
3V
=
–
BC_21P
A
V
3V
=
–
CA_21P
B
V
3V
=
AB_21P
B
V
3V
=
BC_21P
C
V
3V
=
CA_21P
A
V
3V
=
–
AB_21P
A
V
3V
=
–
BC_21P
B
V
3V
=
–
CA_21P
C
V
3V
=
AB_21P
C
V
3V
=
BC_21P
A
V
3V
=
CA_21P
B
V
3V
=
–
AB_21P
B
V
3V
=
–
BC_21P
C
V
3V
=
–
CA_21P
A
8
8-3
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