GE UR T60 - Page 285

GE Multilin T60 Transformer Protection System 5-147
5 SETTINGS 5.6 GROUPED ELEMENTS
5
ward reach impedance defined by the PHS DIST Z1 REACH and PHS DIST Z1 RCA settings, and the reverse reach imped-
ance defined by PHS DIST Z1 REV REACH and PHS DIST Z1 REV REACH RCA as illustrated below.
• 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 5–60: DIRECTIONAL MHO DISTANCE CHARACTERISTIC
Figure 5–61: NON-DIRECTIONAL MHO DISTANCE CHARACTERISTIC
837720A1.CDR
X
R
REACH
RCA
DIR RCA
DIR COMP LIMIT
DIR COMP LIMIT
COMP LIMIT
837802A1.CDR
X
R
RCA
COMP LIMIT
REV REACH
REACH
REV REACH
RCA