GE L90 Instruction Manual page 568

9.5 SINGLE-POLE TRIPPING
Table 9–27: BLOCKING SCHEME TRIP TABLE FOR FOUR-BIT CHANNELS
BIT PATTERN RECEIVED
RX1 RX2
0 0
1 1
1 0
1 1
0 1
1 0
0 1
1 1
1 1
1 1
0 1
1 0
1 1
0 1
1 0
1 1
1 1
9
9-44
REMOTE DATA
REMOTE
DETERMINATION
RX3 RX4
OF FAULT TYPE
0 0 Any while the INIT
signal was not
established
1 0 MULTI-P
1 1 BG
0 1 CG
1 1 AG
1 1 BG
1 1 AG
0 1 CG
1 0 MULTI-P
0 1 CG
1 1 AG
1 1 BG
1 0 MULTI-P
1 1 AG
1 1 BG
0 1 CG
1 0 MULTI-P
L90 Line Current Differential System
9 THEORY OF OPERATION
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
BC, BCG
CA, CAG
AB, ABG
Unrecognized
TRIP OUTPUT
Trip as for single-bit
channel
DIR BLOCK TRIP A
DIR BLOCK TRIP B
DIR BLOCK TRIP C
DIR BLOCK TRIP 3P
GE Multilin