GE D90 Plus - Page 670

660 D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
SINGLE-POLE TRIPPING CHAPTER 15: THEORY OF OPERATION
Table 38: Blocking scheme trip table for two-bit channels
Table 39: Unblocking scheme trip table for two-bit channels
1 0 AG, BC, or BCG BG TRIP PHASE B
1 1 CG, AB, ABG, 3P, or
unrecognized
CG, BC, BCG, CA, or CAG TRIP PHASE C
1 0 AG, BC, or BCG CG TRIP PHASE C
0 1 BG, CA, or CAG CG TRIP PHASE C
1 1 CG, AB, ABG, 3P, or
unrecognized
AB, ABG, 3P, or unrecognized TRIP 3-POLE
1 0 AG, BC, or BCG BC, BCG, or unrecognized TRIP 3-POLE
0 1 BG, CA, or CAG CA, CAG, or unrecognized TRIP 3-POLE
Remote data Local data
Bit pattern Remote determination of
fault type
Local determination of fault
type
Trip output
RX1 RX2
0 1 AG, BC, or BCG AG, AB, ABG, CA, CAG, or 3P DIR BLOCK TRIP A
1 0 BG, CA, or CAG AG DIR BLOCK TRIP A
0 0 CG, AB, ABG, 3P, or
unrecognized
AG DIR BLOCK TRIP A
1 0 BG, CA, or CAG BG, AB, ABG, BC, BCG, or 3P DIR BLOCK TRIP B
0 0 CG, AB, ABG, 3P, or
unrecognized
BG DIR BLOCK TRIP B
0 1 AG, BC, or BCG BG DIR BLOCK TRIP B
0 0 CG, AB, ABG, 3P, or
unrecognized
CG, BC, BCG, CA, or CAG DIR BLOCK TRIP C
0 1 AG, BC, or BCG CG DIR BLOCK TRIP C
1 0 BG, CA, or CAG CG DIR BLOCK TRIP C
0 0 CG, AB, ABG, 3P, or
unrecognized
AB, ABG, 3P, or unrecognized DIR BLOCK TRIP 3P
0 1 AG, BC, or BCG BC, BCG, or unrecognized DIR BLOCK TRIP 3P
1 0 BG, CA, or CAG CA, CAG, or unrecognized DIR BLOCK 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
1100AG, BC, BCG AG, AB, ABG CA, CAG, 3P DCUB TRIP A
0100AG, BC, BCG AG, AB, ABG CA, CAG, 3P DCUB TRIP A
0011BG, CA, CAG AG DCUB TRIP A
0001BG, CA, CAG AG DCUB TRIP A
1111CG, AB, ABG, 3P,
unrecognized
AG DCUB TRIP A
0111CG, AB, ABG, 3P,
unrecognized
AG DCUB TRIP A
1101CG, AB, ABG, 3P,
unrecognized
AG DCUB TRIP A
0101CG, AB, ABG, 3P,
unrecognized
AG DCUB TRIP A
Remote data Local data
Bit pattern Remote determination of
fault type
Local determination of fault
type
Trip output
RX1 RX2