GE D90 Plus Instruction Manual page 671

CHAPTER 15: THEORY OF OPERATION
Four-bit channels
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Remote data
Bit pattern Remote determination of
fault type
RX LO RX LO
1 G1 2 G2
0 0 1 1 BG, CA, CAG
0 0 0 1 BG, CA, CAG
1 1 1 1 CG, AB, ABG, 3P,
unrecognized
0 1 1 1 CG, AB, ABG, 3P,
unrecognized
1 1 0 1 CG, AB, ABG, 3P,
unrecognized
0 1 0 1 CG, AB, ABG, 3P,
unrecognized
1 1 0 0 AG, BC, BCG
0 1 0 0 AG, BC, BCG
1 1 0 0 AG, BC, BCG
0 1 0 0 AG, BC, BCG
0 0 1 1 BG, CA, CAG
0 0 0 1 BG, CA, CAG
1 1 1 1 CG, AB, ABG, 3P,
unrecognized
0 1 1 1 CG, AB, ABG, 3P,
unrecognized
1 1 0 1 CG, AB, ABG, 3P,
unrecognized
0 1 0 1 CG, AB, ABG, 3P,
unrecognized
1 1 0 0 AG, BC, BCG
0 1 0 0 AG, BC, BCG
0 0 1 1 BG, CA, CAG
0 0 0 1 BG, CA, CAG
1 1 1 1 CG, AB, ABG, 3P,
unrecognized
0 1 1 1 CG, AB, ABG, 3P,
unrecognized
1 1 0 1 CG, AB, ABG, 3P,
unrecognized
0 1 0 1 CG, AB, ABG, 3P,
unrecognized
Four-bit communication channels for pilot-aided schemes use the RX1, RX2 RX3, RX4, TX1,
TX2, TX3, and TX4 operands for each scheme. The fault data is coded as shown in the
following tables.
Table 40: Permissive scheme transmit codes for four-bit channels
Phase selector determination of fault type
AG
BG
CG
SINGLE-POLE TRIPPING
Local data
Local determination of fault
type
BG, AB, ABG BC, BCG, 3P
BG, AB, ABG BC, BCG, 3P
BG
BG
BG
BG
BG
BG
CG
CG
CG
CG
CG, BC, BCG, CA, CAG
CG, BC, BCG, CA, CAG
CG, BC, BCG, CA, CAG
CG, BC, BCG, CA, CAG
BC, BCG, unrecognized
BC, BCG, unrecognized
CA, CAG, unrecognized
CA, CAG, unrecognized
AB, ABG, 3P, unrecognized
AB, ABG, 3P, unrecognized
AB, ABG, 3P, unrecognized
AB, ABG, 3P, unrecognized
Bit pattern
TX1 TX2
1 0
0 1
0 0
Trip output
DCUB TRIP B
DCUB TRIP B
DCUB TRIP B
DCUB TRIP B
DCUB TRIP B
DCUB TRIP B
DCUB TRIP B
DCUB TRIP B
DCUB TRIP C
DCUB TRIP C
DCUB TRIP C
DCUB TRIP C
DCUB TRIP C
DCUB TRIP C
DCUB TRIP C
DCUB TRIP C
DCUB TRIP 3P
DCUB TRIP 3P
DCUB TRIP 3P
DCUB TRIP 3P
DCUB TRIP 3P
DCUB TRIP 3P
DCUB TRIP 3P
DCUB TRIP 3P
TX3 TX4
0 0
0 0
1 0
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