CHAPTER 15: THEORY OF OPERATION
PLUS
D90
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Table 50: Trip table for cross-country fault example, four-bit channel
Terminal
Remote data
Bit pattern
RX1
RX2
RX3
T1
0
0
0
T2
1
0
0
Local data
Remote
Local
determination of
determination of
RX4
fault type
fault type
1
AG
ABG
0
ABG
AG
SINGLE-POLE TRIPPING
Trip output
TRIP PHASE A
TRIP PHASE A
667