GE D90 Plus - Page 672

662 D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
SINGLE-POLE TRIPPING CHAPTER 15: THEORY OF OPERATION
Table 41: Blocking scheme transmit codes for four-bit channels
Table 42: Unblocking scheme transmit codes for four-bit channels
The generated action output is indicated in the following tables.
Table 43: Permissive scheme trip table for four-bit channels
Phase selector determination of fault type Bit pattern Operands asserted
TX1 TX2 TX3 TX4 TX1
STOP
TX2
STOP
TX3
STOP
TX4
STOP
AG 01111000
BG 10110100
CG 11010010
AB, ABG, BC, BCG, CA, CAG, 3P, or
unrecognized
11100001
Phase selector determination of fault type Bit pattern
TX1 TX2 TX3 TX4
AG 1000
BG 0100
CG 0010
AB, ABG, BC, BCG, CA, CAG, 3P, or unrecognized 0001
Remote data Local data
Bit pattern Remote
determination of
fault type
Local determination
of fault type
Trip output
RX1 RX2 RX3 RX4
0001MULTI-P AG TRIP PHASE A
0100BG AG TRIP PHASE A
0010CG AG TRIP PHASE A
1000AG AG, AB, ABG, CA, CAG,
3P, Unrecognized
TRIP PHASE A
0100BG BG, AB, ABG, BC, BCG,
3P, Unrecognized
TRIP PHASE B
1000AG BG TRIP PHASE B
0010CG BG TRIP PHASE B
0001MULTI-P BG TRIP PHASE B
0 0 1 0 CG CG, BC, BCG, CA, CAG,
3P, Unrecognized
TRIP PHASE C
1000AG CG TRIP PHASE C
0100BG CG TRIP PHASE C
0001MULTI-P CG TRIP PHASE C
1000AG BC, BCG TRIP 3-POLE
0100BG CA, CAG TRIP 3-POLE
0010CG AB, ABG TRIP 3-POLE
0001MULTI-P Unrecognized TRIP 3-POLE