GE D90 Plus Instruction Manual page 210

GROUPED PROTECTION ELEMENTS
200
Figure 176: Phase distance zone 2 operation logic
The following figure shows the phase distance scheme logic for zone 1. The logic is
analogous for zones 2 through 5.
Figure 177: Phase distance logic
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION