GE D90 Plus Instruction Manual page 206

GROUPED PROTECTION ELEMENTS
196
Figure 172: Phase distance zone 2 operation scheme logic
The phase distance scheme logic for zone 1 is shown below. The logic is analogous for
zones 2 through 5.
Figure 173: Phase distance scheme logic
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION