GE D30 Instruction Manual page 612

FAULT LOCATOR
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
9
9-24
setting value is "V0" and the VTs are connected in a wye configuration, the fault
setting value is "I0" and the VTs are connected in a wye configuration, the fault
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 9: THEORY OF OPERATION
Eq. 9-20
Eq. 9-21