GE D30 series Instruction Manual page 245

Line distance protection system. ur series

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Ensure that the Phase VT Secondary Voltage setting (see the SETTINGS ðò SYSTEM SETUP ð AC

INPUTS ðò VOLTAGE BANK menu) is set correctly to prevent improper operation of associated

memory action.

PHS DIST Z1 DIR: All phase distance zones are reversible. The forward direction is defined by the

setting, whereas the reverse direction is shifted 180° from that angle. The non-directional zone spans between the for-

ward reach impedance defined by the

ance defined by

PHS DIST Z1 REV REACH

PHS DIST Z1 SHAPE: This setting selects the shape of the phase distance function between the mho and quadrilat-

eral characteristics. The selection is available on a per-zone basis. The two characteristics and their possible varia-

tions are shown in the following figures.

Figure 5–52: DIRECTIONAL MHO DISTANCE CHARACTERISTIC

Figure 5–53: NON-DIRECTIONAL MHO DISTANCE CHARACTERISTIC

PHS DIST Z1 REACH

PHS DIST Z1 RCA

PHS DIST Z1 REV REACH RCA

DIR COMP LIMIT

D30 Line Distance Protection System

5.6 GROUPED ELEMENTS

PHS DIST Z1 RCA

settings, and the reverse reach imped-

as illustrated below.

837720A1.CDR

837802A1.CDR