GE D90 Plus - Page 671

CHAPTER 15: THEORY OF OPERATION SINGLE-POLE TRIPPING
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 661
Four-bit channels
Four-bit communication channels for pilot-aided schemes use the RX1, RX2, RX3, RX4, TX1,
TX2, TX3, and TX4 operands for each scheme. The tables show how fault data is coded.
Table 40: Permissive scheme transmit codes for four-bit channels
0011BG, CA, CAG BG, AB, ABG BC, BCG, 3P DCUB TRIP B
0001BG, CA, CAG BG, AB, ABG BC, BCG, 3P DCUB TRIP B
1111CG, AB, ABG, 3P,
unrecognized
BG DCUB TRIP B
0111CG, AB, ABG, 3P,
unrecognized
BG DCUB TRIP B
1101CG, AB, ABG, 3P,
unrecognized
BG DCUB TRIP B
0101CG, AB, ABG, 3P,
unrecognized
BG DCUB TRIP B
1100AG, BC, BCG BG DCUB TRIP B
0100AG, BC, BCG BG DCUB TRIP B
1100AG, BC, BCG CG DCUB TRIP C
0100AG, BC, BCG CG DCUB TRIP C
0011BG, CA, CAG CG DCUB TRIP C
0001BG, CA, CAG CG DCUB TRIP C
1111CG, AB, ABG, 3P,
unrecognized
CG, BC, BCG, CA, CAG DCUB TRIP C
0111CG, AB, ABG, 3P,
unrecognized
CG, BC, BCG, CA, CAG DCUB TRIP C
1101CG, AB, ABG, 3P,
unrecognized
CG, BC, BCG, CA, CAG DCUB TRIP C
0101CG, AB, ABG, 3P,
unrecognized
CG, BC, BCG, CA, CAG DCUB TRIP C
1100AG, BC, BCG BC, BCG, unrecognized DCUB TRIP 3P
0100AG, BC, BCG BC, BCG, unrecognized DCUB TRIP 3P
0011BG, CA, CAG CA, CAG, unrecognized DCUB TRIP 3P
0001BG, CA, CAG CA, CAG, unrecognized DCUB TRIP 3P
1111CG, AB, ABG, 3P,
unrecognized
AB, ABG, 3P, unrecognized DCUB TRIP 3P
0111CG, AB, ABG, 3P,
unrecognized
AB, ABG, 3P, unrecognized DCUB TRIP 3P
1101CG, AB, ABG, 3P,
unrecognized
AB, ABG, 3P, unrecognized DCUB TRIP 3P
0101CG, AB, ABG, 3P,
unrecognized
AB, ABG, 3P, unrecognized DCUB TRIP 3P
Remote data Local data
Bit pattern Remote determination of
fault type
Local determination of fault
type
Trip output
RX
1
LO
G1
RX
2
LO
G2
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