GE D90 Plus Instruction Manual page 193

Line distance protection system

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CHAPTER 7: PROTECTION

LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL

Figure 145: Load encroachment characteristic

The element operates if the positive-sequence voltage is above a user-specified level and

asserts its output signal that can be used to block selected protection elements such as

distance or phase overcurrent. The following figure shows an effect of the load

encroachment characteristics used to block the quadrilateral distance element.

Figure 146: Load encroachment applied to distance element

Select the Settings > Protection > Elements > Group 1 > Load Encroachment menu item

to open the load encroachment configuration window.

GROUPED PROTECTION ELEMENTS