GE 850 - Page 647

CHAPTER 12: RECORDS FAULT REPORTS
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 12–3
Figure 12-1: Fault Locator Logic diagram
Phase A Current (IA)
Phase B Current (IB)
Phase C Current (IC)
SETPOINTS
FAULT REPORT
FAULT TRIGGER :
Off =0
SETPOINTS
FAULT REPORT
Z_1 (RESISTIVE ):
WYE
DELTA
VA
VAB
VB VBC
VC VCA
Vn or V 0
Neutral Current (3I0)
Current Inputs
Voltage Inputs
FAULT DISTANCE
CALCULATION
RUN
FAULT REPORT
Z_1 (INDUCTIVE ):
FAULT REPORT
Z_0 (RESISTIVE ):
FAULT REPORT
Z_0 (INDUCTIVE ):
FAULT REPORT
UNITS OF LENGTH :
FAULT REPORT
LENGTH :
FAULT REPORT
Z_0 SYS (RESISTIVE ):
FAULT REPORT
Z_0 SYS (INDUCTIVE ):
RECORDS
FAULT REPORT
DATE
FAULT REPORT
TIME
FAULT REPORT
TYPE OF FAULT
FAULT REPORT
DISTANCE TO FAULT
Type of Fault
(Phase selector)