GE D90 Plus Instruction Manual page 581

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