662
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
SINGLE-POLE TRIPPING
CHAPTER 15: THEORY OF OPERATION
Table 41: Blocking scheme transmit codes for four-bit channels
Table 42: Unblocking scheme transmit codes for four-bit channels
The generated action output is indicated in the following tables.
Table 43: Permissive scheme trip table for four-bit channels
AB, ABG, BC, BCG, CA, CAG, 3P, or unrecognized
0
0
0
1
Phase selector determination of fault type
Bit pattern
Operands asserted
TX1
TX2
TX3
TX4
TX1
STOP
TX2
STOP
TX3
STOP
TX4
STOP
AG
0
1
1
1
1
0
0
0
BG
1
0
1
1
0
1
0
0
CG
1
1
0
1
0
0
1
0
AB, ABG, BC, BCG, CA, CAG, 3P, or
unrecognized
1
1
1
0
0
0
0
1
Phase selector determination of fault type
Bit pattern
TX1
TX2
TX3
TX4
AG
1
0
0
0
BG
0
1
0
0
CG
0
0
1
0
AB, ABG, BC, BCG, CA, CAG, 3P, or unrecognized
0
0
0
1
Remote data
Local data
Bit pattern
Remote
determination of
fault type
Local determination
of fault type
Trip output
RX1
RX2
RX3
RX4
0
0
0
1
MULTI-P
AG
TRIP
PHASE
A
0
1
0
0
BG
AG
TRIP PHASE A
0
0
1
0
CG
AG
TRIP PHASE A
1
0
0
0
AG
AG, AB, ABG, CA, CAG,
3P, Unrecognized
TRIP PHASE A
0
1
0
0
BG
BG, AB, ABG, BC, BCG,
3P, Unrecognized
TRIP PHASE B
1
0
0
0
AG
BG
TRIP PHASE B
0
0
1
0
CG
BG
TRIP PHASE B
0
0
0
1
MULTI-P
BG
TRIP PHASE B
0
0
1
0
CG
CG, BC, BCG, CA, CAG,
3P, Unrecognized
TRIP PHASE C
1
0
0
0
AG
CG
TRIP PHASE C
0
1
0
0
BG
CG
TRIP PHASE C
0
0
0
1
MULTI-P
CG
TRIP PHASE C
1
0
0
0
AG
BC, BCG
TRIP 3-POLE
0
1
0
0
BG
CA, CAG
TRIP 3-POLE
0
0
1
0
CG
AB, ABG
TRIP 3-POLE
0
0
0
1
MULTI-P
Unrecognized
TRIP 3-POLE
Phase selector determination of fault type
Bit pattern
TX1
TX2
TX3
TX4