GE UR Series L90 Instruction Manual page 587

9 THEORY OF OPERATION
Table 9–19: UNBLOCKING SCHEME TRANSMIT CODES FOR 2-BIT CHANNELS
PHASE SELECTOR DETERMINATION
OF FAULT TYPE
AG, BC, BCG
BG, CA, CAG
CG, AB, ABG, 3P, Unrecognized
The action output is generated per the following tables.
Table 9–20: PERMISSIVE SCHEME TRIP TABLE FOR 2-BIT CHANNELS
REMOTE DATA
BIT PATTERN RECEIVED REMOTE DETERMINATION OF FAULT
RX1 RX2
1 0
0 1
1 1
0 1
1 1
1 0
1 1
1 0
0 1
1 1
1 0
0 1
Table 9–21: BLOCKING SCHEME TRIP TABLE FOR 2-BIT CHANNELS
REMOTE DATA
BIT PATTERN RECEIVED REMOTE DETERMINATION OF FAULT
RX1 RX2
0 1
1 0
0 0
1 0
0 0
0 1
0 0
0 1
1 0
0 0
0 1
1 0
GE Multilin
BIT PATTERN TRANSMITTED
TX1
1
0
1
TYPE
AG, BC, BCG
BG, CA, CAG
CG, AB, ABG, 3P, Unrecognized
BG, CA, CAG
CG, AB, ABG, 3P, Unrecognized
AG, BC, BCG
CG, AB, ABG, 3P, Unrecognized
AG, BC, BCG
BG, CA, CAG
CG, AB, ABG, 3P, Unrecognized
AG, BC, BCG
BG, CA, CAG
TYPE
AG, BC, BCG
BG, CA, CAG
CG, AB, ABG, 3P, Unrecognized
BG, CA, CAG
CG, AB, ABG, 3P, Unrecognized
AG, BC, BCG
CG, AB, ABG, 3P, Unrecognized
AG, BC, BCG
BG, CA, CAG
CG, AB, ABG, 3P, Unrecognized
AG, BC, BCG
BG, CA, CAG
L90 Line Current Differential System
9.5 SINGLE-POLE TRIPPING
TX2
0
1
1
LOCAL DATA
LOCAL DETERMINATION
OF FAULT TYPE
AG, AB, ABG CA, CAG, 3P
AG
AG
BG, AB, ABG, BC, BCG, 3P
BG
BG
CG, BC, BCG, CA, CAG
CG
CG
AB, ABG, 3P, Unrecognized
BC, BCG, Unrecognized
CA, CAG, Unrecognized
LOCAL DATA
LOCAL DETERMINATION
OF FAULT TYPE
AG, AB, ABG CA, CAG, 3P
AG
AG
BG, AB, ABG, BC, BCG, 3P
BG
BG
CG, BC, BCG, CA, CAG
CG
CG
AB, ABG, 3P, Unrecognized
BC, BCG Unrecognized
CA, CAG Unrecognized
TRIP OUTPUT
Trip Phase A
Trip Phase B
Trip Phase C
Trip Three Phases
TRIP OUTPUT
DIR BLOCK TRIP A
DIR BLOCK TRIP B
DIR BLOCK TRIP C
DIR BLOCK TRIP 3P
9
9-41