GE c60 Instruction Manual page 451
Breaker protection system
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Also See for c60:
- Instruction manual (682 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (320 pages)
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CHAPTER 8: THEORY OF OPERATION
The relay allows locating faults from delta-connected VTs. If the
and the VTs are connected in wye, the fault location is performed based on the actual phase to ground voltages. If the VTs
are connected in delta, fault location is suspended.
If the
FAULT REPORT 1 VT SUBSTITUTION
location is performed based on the actual phase to ground voltages. If the VTs are connected in a delta configuration, fault
location is performed based on the delta voltages and externally supplied neutral voltage:
If the
FAULT REPORT 1 VT SUBSTITUTION
location is performed based on the actual phase to ground voltages. If the VTs are connected in a delta configuration, fault
location is performed based on the delta voltages and zero-sequence voltage approximated based on the zero-sequence
current:
where Z
is the equivalent zero-sequence impedance behind the relay as entered under the fault report setting menu.
SYS0
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
FAULT REPORT 1 VT SUBSTITUTION
setting value is "V0" and the VTs are connected in a wye configuration, the fault
1
V
=
-- V
+
V
V
–
A
N
AB
CA
3
1
V
=
-- V
+
V
V
–
B
N
BC
AB
3
1
V
=
-- V
+
V
V
–
B
N
CA
BC
3
setting value is "I0" and the VTs are connected in a wye configuration, the fault
1
Z
V
=
-- V
V
–
–
A
AB
CA
SYS0
3
1
Z
V
=
-- V
V
–
–
B
BC
AB
SYS0
3
1
Z
V
=
-- V
V
–
–
B
CA
BC
SYS0
3
I
0
I
0
I
0
FAULT LOCATOR
setting is set to "None,"
Eq. 8-13
Eq. 8-14
8-3
8
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