GE UR Series L90, Instruction Manual, Page: 590 / 846

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