GE L90 Instruction Manual page 788

SINGLE-POLE TRIPPING
Table 10-26: Permissive scheme transmit codes for four-bit channels
Phase selector determination of
fault type
AG
BG
CG
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
Table 10-27: Blocking scheme transmit codes for four-bit channels
Phase selector determination
of fault type
AG
BG
CG
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
Table 10-28: Unblocking scheme transmit codes for four-bit channels
Phase selector determination of
fault type
AG
BG
CG
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
The action output is generated per the following tables.
Table 10-29: Permissive scheme trip table for four-bit channels
Remote data
Bit pattern received
RX1 RX2
0 0
0 1
0 0
1 0
0 1
1 0
0 0
0 0
0 0
1 0
0 1
0 0
10
10-46
Bit pattern transmitted
TX1
1
0
0
0
Bit pattern transmitted
TX1 TX2
0 1
1 0
1 1
1 1
Bit pattern transmitted
TX1
1
0
0
0
Remote
determination of
RX3 RX4
fault type
0 1 MULTI-P
0 0 BG
1 0 CG
0 0 AG
0 0 BG
0 0 AG
1 0 CG
0 1 MULTI-P
1 0 CG
0 0 AG
0 0 BG
0 1 MULTI-P
TX2 TX3
0 0
1 0
0 1
0 0
FlexLogic operands asserted
TX3 TX4 TX1 STOP
1 1 1
1 1 0
0 1 0
1 0 0
TX2 TX3
0 0
1 0
0 1
0 0
Local data
Local determination of fault
type
AG
AG
AG
AG, AB, ABG, CA, CAG, 3P,
Unrecognized
BG, AB, ABG, BC, BCG, 3P,
Unrecognized
BG
BG
BG
CG, BC, BCG, CA, CAG, 3P,
Unrecognized
CG
CG
CG
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 10: THEORY OF OPERATION
TX4
0
0
0
1
TX2 STOP TX3 STOP TX4 STOP
0 0 0
1 0 0
0 1 0
0 0 1
TX4
0
0
0
1
Trip output
Trip Phase A
Trip Phase B
Trip Phase C