GE D90 Plus Instruction Manual page 212

Line distance protection system

Hide thumbs Also See for D90 Plus:

Table of Contents

GROUPED PROTECTION ELEMENTS

Figure 178: Ground distance settings configuration

The following settings are available for each ground distance zone. There are five ground

distance zones of protection in each setting group.

Range: Enabled, Disabled

Default: Disabled

This setting enables and disables the phase distance protection feature.

Range: Forward, Reverse, Non-directional

Default: Forward

All ground distance zones are reversible. The forward direction is defined by the

setting and the reverse direction is shifted by 180° from that angle. The non-directional

zone spans between the forward reach impedance defined by the

settings, and the reverse reach impedance defined by the

Range: Mho, Quad

Default: Mho

This setting selects the shape of the ground distance characteristic between the mho

and quadrilateral characteristics. The selection is available on a per-zone basis.

The figures show the directional and non-directional mho and quadrilateral ground

distance characteristics.

LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL

CHAPTER 7: PROTECTION

Reverse Reach