GE D60 Instruction Manual page 519

9 THEORY OF OPERATION
Table 9–22: UNBLOCKING SCHEME TRIP TABLE FOR 2-BIT CHANNELS
REMOTE DATA
BIT PATTERN RECEIVED
RX1 LOG1 RX2 LOG2
1 1 0
0 1 0
0 0 1
0 0 0
1 1 1
0 1 1
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
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
d) FOUR-BIT CHANNELS
The TX1, TX2, TX3, TX4, RX1, RX2, RX3 and RX4 operands are used.
Table 9–23: PERMISSIVE SCHEME TRANSMIT CODES FOR 4-BIT CHANNELS
PHASE SELECTOR
DETERMINATION OF FAULT TYPE
AG
BG
CG
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
GE Multilin
REMOTE DETERMINATION OF
FAULT TYPE
0 AG, BC, BCG
0
1 BG, CA, CAG
1
1 CG, AB, ABG, 3P, unrecognized
1
1
1
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
D60 Line Distance Protection System
9.5 SINGLE-POLE TRIPPING
LOCAL DATA
LOCAL DETERMINATION
OF FAULT TYPE
AG, AB, ABG CA, CAG, 3P
AG
AG
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
TRIP OUTPUT
DCUB TRIP A
DCUB TRIP B
DCUB TRIP C
DCUB TRIP 3P
9
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