GE D60 Instruction Manual page 735

CHAPTER 9: THEORY OF OPERATION
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
D60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
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
FAULT LOCATOR
Eq. 9-20
Eq. 9-21
9
9-39