GE UR Series L90 Instruction Manual page 588

9.5 SINGLE-POLE TRIPPING
Table 9–22: UNBLOCKING SCHEME TRIP TABLE FOR 2-BIT CHANNELS
BIT PATTERN RECEIVED
RX1 LOG1 RX2
1 1
0 1
0 0
0 0
1 1
0 1
1 1
0 1
0 0
0 0
1 1
0 1
1 1
0 1
1 1
0 1
1 1
0 1
0 0
0 0
1 1
0 1
1 1
0 1
1 1
0 1
0 0
0 0
1 1
0 1
1 1
0 1
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
9
PHASE SELECTOR
DETERMINATION OF FAULT TYPE
AG
BG
CG
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
9-42
REMOTE DATA
REMOTE DETERMINATION OF
FAULT TYPE
LOG2
0 0 AG, BC, BCG
0 0
1 1 BG, CA, CAG
0 1
1 1 CG, AB, ABG, 3P, unrecognized
1 1
0 1
0 1
1 1 BG, CA, CAG
0 1
1 1 CG, AB, ABG, 3P, unrecognized
1 1
0 1
0 1
0 0 AG, BC, BCG
0 0
0 0 AG, BC, BCG
0 0
1 1 BG, CA, CAG
0 1
1 1 CG, AB, ABG, 3P, unrecognized
1 1
0 1
0 1
0 0 AG, BC, BCG
0 0
1 1 BG, CA, CAG
0 1
1 1 CG, AB, ABG, 3P, unrecognized
1 1
0 1
0 1
BIT PATTERN TRANSMITTED
TX1
1
0
0
0
L90 Line Current Differential System
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
TX2 TX3 TX4
0 0 0
1 0 0
0 1 0
0 0 1
9 THEORY OF OPERATION
LOCAL DATA
TRIP OUTPUT
DCUB TRIP A
DCUB TRIP B
DCUB TRIP C
DCUB TRIP 3P
GE Multilin