GE L90

10-46 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
SINGLE-POLE TRIPPING CHAPTER 10: THEORY OF OPERATION
10
Table 10-26: Permissive scheme transmit codes for four-bit channels
Table 10-27: Blocking scheme transmit codes for four-bit channels
Table 10-28: Unblocking scheme transmit codes for four-bit channels
The action output is generated per the following tables.
Table 10-29: Permissive scheme trip table for four-bit channels
Phase selector determination of
fault type
Bit pattern transmitted
TX1 TX2 TX3 TX4
AG 1000
BG 0100
CG 0010
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
0001
Phase selector determination
of fault type
Bit pattern transmitted FlexLogic operands 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
1110 0 0 0 1
Phase selector determination of
fault type
Bit pattern transmitted
TX1 TX2 TX3 TX4
AG 1000
BG 0100
CG 0010
AB, ABG, BC, BCG, CA, CAG, 3P,
Unrecognized
0001
Remote data Local data
Bit pattern received Remote
determination of
fault type
Local determination of fault
type
Trip output
RX1 RX2 RX3 RX4
0001 MULTI-P AG Trip Phase A
0100 BG AG
0010 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
1000 AG BG
0010 CG BG
0001 MULTI-P BG
0 0 1 0 CG CG, BC, BCG, CA, CAG, 3P,
Unrecognized
Trip Phase C
1000 AG CG
0100 BG CG
0001 MULTI-P CG