GE G60

8-2 G60 Generator Protection System GE Multilin
8.1 PHASE DISTANCE THROUGH POWER TRANSFORMERS 8 THEORY OF OPERATION
8
Table 8–1: PHASE DISTANCE INPUT SIGNALS FOR DELTA-WYE TRANSFORMERS
TRANSFORMER
CONNECTION
LOOP CURRENT
TRANSFORMATION
VOLTAGE
TRANSFORMATION
None AB
BC
CA
Dy1 AB
BC
CA
Dy3 AB
BC
CA
Dy5 AB
BC
CA
Dy7 AB
BC
CA
Dy9 AB
BC
CA
Dy11 AB
BC
CA
I
A
I
B
–
V
AB
I
B
I
C
–
V
BC
I
C
I
A
–
V
CA
3I
A
1
3
-------
V
AB
V
CA
–()
3I
B
1
3
-------
V
BC
V
AB
–()
3I
C
1
3
-------
V
CA
V
BC
–()
I
AB_21P
3I
C
–=
V
AB_21P
1
3
-------
V
BC
V
CA
–()=
I
BC_21P
3I
A
–=
V
BC_21P
1
3
-------
V
CA
V
AB
–()=
I
CA_21P
3I
B
–=
V
CA_21P
1
3
-------
V
AB
V
BC
–()=
I
AB_21P
3I
B
=
V
AB_21P
1
3
-------
V
BC
V
AB
–()=
I
BC_21P
3I
C
=
V
BC_21P
1
3
-------
V
CA
V
BC
–()=
I
CA_21P
3I
A
=
V
CA_21P
1
3
-------
V
AB
V
CA
–()=
I
AB_21P
3I
A
–=
V
AB_21P
1
3
-------
V
CA
V
AB
–()=
I
BC_21P
3I
B
–=
V
BC_21P
1
3
-------
V
AB
V
BC
–()=
I
CA_21P
3I
C
–=
V
CA_21P
1
3
-------
V
BC
V
CA
–()=
I
AB_21P
3I
C
=
V
AB_21P
1
3
-------
V
CA
V
BC
–()=
I
BC_21P
3I
A
=
V
BC_21P
1
3
-------
V
AB
V
CA
–()=
I
CA_21P
3I
B
=
V
CA_21P
1
3
-------
V
BC
V
AB
–()=
I
AB_21P
3I
B
–=
V
AB_21P
1
3
-------
V
AB
V
BC
–()=
I
BC_21P
3I
C
–=
V
BC_21P
1
3
-------
V
BC
V
CA
–()=
I
CA_21P
3I
A
–=
V
CA_21P
1
3
-------
V
CA
V
AB
–()=