GE UR Series L90 Instruction Manual page 586

9.5 SINGLE-POLE TRIPPING
Table 9–14: PERMISSIVE SCHEME TRIP TABLE FOR 1-BIT CHANNELS
BIT PATTERN RECEIVED
RX1
1
Table 9–15: BLOCKING SCHEME TRIP TABLE FOR 1-BIT CHANNELS
BIT PATTERN RECEIVED
RX1
0
0
0
0
Table 9–16: UNBLOCKING SCHEME TRIP TABLE FOR 1-BIT CHANNELS
BIT PATTERN RECEIVED
RX1 LOG1
0 or 1
0 or 1
0 or 1
0 or 1
The scheme initiates a three-phase trip if the phase selector fails to recognize the fault type or after the AR FORCE 3P
TRIP operand is asserted.
c) TWO-BIT CHANNELS
The TX1, TX2, RX1 and RX2 operands are used and fault data is coded per the following tables.
Table 9–17: PERMISSIVE SCHEME TRANSMIT CODES FOR 2-BIT CHANNELS
PHASE SELECTOR DETERMINATION
OF FAULT TYPE
AG, BC, BCG
BG, CA, CAG
CG, AB, ABG, 3P, Unrecognized
Table 9–18: BLOCKING SCHEME TRANSMIT CODES FOR 2-BIT CHANNELS
9
PHASE SELECTOR DETERMINATION
OF FAULT TYPE
AG, BC, BCG
BG, CA, CAG
CG, AB, ABG, 3P
CG, AB, ABG, 3P, Unrecognized
9-40
REMOTE DATA
REMOTE DETERMINATION
OF FAULT TYPE
Any
REMOTE DATA
REMOTE DETERMINATION
OF FAULT TYPE
Any
Any
Any
Any
REMOTE DATA
REMOTE DETERMINATION
OF FAULT TYPE
1 Any
1 Any
1 Any
1 Any
BIT PATTERN TRANSMITTED
TX1
1
0
1
BIT PATTERN TRANSMITTED
TX1
0
1
0
0
L90 Line Current Differential System
9 THEORY OF OPERATION
LOCAL DATA
LOCAL DETERMINATION OF
FAULT TYPE
AB, ABG, BC, BCG, CA, CAG,
3P, Unrecognized
LOCAL DATA
LOCAL DETERMINATION OF
FAULT TYPE
AG Fault
BG Fault
CG Fault
AB, ABG, BC, BCG, CA, CAG,
3P, Unrecognized
LOCAL DATA
LOCAL DETERMINATION OF
FAULT TYPE
AG Fault
BG Fault
CG Fault
AB, ABG, BC, BCG, CA, CAG,
3P, Unrecognized
TX2
0
1
1
FLEXLOGIC™ OPERANDS
ASSERTED
TX2 TX1 STOP TX2 STOP
1 1
0 0
0 1
0 1
TRIP OUTPUT
Trip Three Phases (per local
selection, unrecognized and
3P=A+B+C+N/G)
TRIP OUTPUT
Trip Phase A
Trip Phase B
Trip Phase C
Trip Three Phases
TRIP OUTPUT
DCUB TRIP A
DCUB TRIP B
DCUB TRIP C
DCUB TRIP 3P
0
1
1
1
GE Multilin