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5.6 GROUPED ELEMENTS
•
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.
5
5-128
Ensure that the Phase VT Secondary Voltage setting (see the
menu) is set correctly to prevent improper operation of associated mem-
INPUTS
VOLTAGE BANK
ory action.
PHS DIST Z1 REACH
and
PHS DIST Z1 REV REACH RCA
X
DIR COMP LIMIT
Figure 5–51: DIRECTIONAL MHO DISTANCE CHARACTERISTIC
REV REACH
RCA
Figure 5–52: NON-DIRECTIONAL MHO DISTANCE CHARACTERISTIC
D30 Line Distance Protection System
and
settings, and the reverse reach imped-
PHS DIST Z1 RCA
as illustrated below.
COMP LIMIT
DIR COMP LIMIT
DIR RCA
RCA
R
837720A1.CDR
X
COMP LIMIT
RCA
837802A1.CDR
5 SETTINGS
SETTINGS
SYSTEM SETUP
PHS DIST Z1 RCA
R
GE Multilin
AC
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