GE D90 Plus Instruction Manual page 219

CHAPTER 7: PROTECTION
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 184: Ground distance zone 2 operation logic
The following figure shows the ground distance scheme logic for zone 1.
Figure 185: Ground distance zone 1 logic
The following figure shows the ground distance scheme logic for zone 2. The logic is
analogous for zones 3 through 5.
GROUPED PROTECTION ELEMENTS
209