GE UR Series L90, Instruction Manual, Page: 589 / 846

GE Multilin L90 Line Current Differential System 9-43
9 THEORY OF OPERATION 9.5 SINGLE-POLE TRIPPING
9
The action output is generated per the following tables.
Table 9–24: BLOCKING SCHEME TRANSMIT CODES FOR 4-BIT CHANNELS
PHASE SELECTOR
DETERMINATION OF FAULT
TYPE
BIT PATTERN TRANSMITTED FLEXLOGIC™ OPRERANDS ASSERTED
TX1 TX2 TX3 TX4 TX1 STOP TX2 STOP TX3 STOP TX4 STOP
AG 0 1 1 1 1 0 0 0
BG 1 0 1 1 0 1 0 0
CG 1 1 0 1 0 0 1 0
AB, ABG, BC, BCG, CA, CAG,
3P, Unrecognized
1 1 1 0 0 0 0 1
Table 9–25: UNBLOCKING SCHEME TRANSMIT CODES FOR 4-BIT CHANNELS
PHASE SELECTOR
DETERMINATION OF FAULT TYPE
BIT PATTERN TRANSMITTED
TX1 TX2 TX3 TX4
AG 1 0 0 0
BG 0 1 0 0
CG 0 0 1 0
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
0 0 0 1
Table 9–26: PERMISSIVE SCHEME TRIP TABLE FOR 4-BIT CHANNELS
REMOTE DATA LOCAL DATA
BIT PATTERN RECEIVED REMOTE
DETERMINATION OF
FAULT TYPE
LOCAL DETERMINATION OF
FAULT TYPE
TRIP OUTPUT
RX1 RX2 RX3 RX4
0 0 0 1 MULTI-P AG Trip Phase A
0 1 0 0 BG AG
0 0 1 0 CG AG
1 0 0 0 AG AG, AB, ABG, CA, CAG, 3P,
Unrecognized
0 1 0 0 BG BG, AB, ABG, BC, BCG, 3P,
Unrecognized
Trip Phase B
1 0 0 0 AG BG
0 0 1 0 CG BG
0 0 0 1 MULTI-P BG
0 0 1 0 CG CG, BC, BCG, CA, CAG, 3P,
Unrecognized
Trip Phase C
1 0 0 0 AG CG
0 1 0 0 BG CG
0 0 0 1 MULTI-P CG
1 0 0 0 AG BC, BCG Trip Three Phases
0 1 0 0 BG CA, CAG
0 0 1 0 CG AB, ABG
0 0 0 1 MULTI-P Unrecognized