GE C60 Instruction Manual page 533

CHAPTER 8: THEORY OF OPERATION
Remote data
Bit pattern received
RX1 LOG1 RX2
0 0 1
0 0 0
1 1 1
0 1 1
1 1 0
0 1 0
1 1 0
0 1 0
1 1 0
0 1 0
0 0 1
0 0 0
1 1 1
0 1 1
1 1 0
0 1 0
1 1 0
0 1 0
0 0 1
0 0 0
1 1 1
0 1 1
1 1 0
0 1 0
8.2.3.4 Four-bit channels
The TX1, TX2, TX3, TX4, RX1, RX2, RX3, and RX4 operands are used.
Table 8-15: Permissive scheme transmit codes for four-bit channels
Phase selector determination of
fault type
AG
BG
CG
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
Table 8-16: Blocking scheme transmit codes for four-bit channels
Phase selector determination
of fault type
AG
BG
CG
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
Remote determination
of fault type
LOG2
1 BG, CA, CAG
1
1 CG, AB, ABG, 3P,
unrecognized
1
1
1
0 AG, BC, BCG
0
0 AG, BC, BCG
0
1 BG, CA, CAG
1
1 CG, AB, ABG, 3P,
unrecognized
1
1
1
0 AG, BC, BCG
0
1 BG, CA, CAG
1
1 CG, AB, ABG, 3P,
unrecognized
1
1
1
Bit pattern transmitted
TX1 TX2
1 0
0 1
0 0
0 0
Bit pattern transmitted
TX1 TX2 TX3
0 1 1
1 0 1
1 1 0
1 1 1
Local data
Local determination of
fault type
BG, AB, ABG BC, BCG, 3P
BG
BG
CG
CG
CG, BC, BCG, CA, CAG
BC, BCG, unrecognized
CA, CAG, unrecognized
AB, ABG, 3P, unrecognized
TX3 TX4
0 0
0 0
1 0
0 1
FlexLogic operands asserted
TX4 TX1 STOP TX2 STOP
1 1 0
1 0 1
1 0 0
0 0 0
SINGLE-POLE TRIPPING
Trip output
DCUB TRIP B
DCUB TRIP C
DCUB TRIP 3P
TX3 STOP TX4 STOP
0 0
0 0
1 0
0 1
8-13
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