ANSI00000545-3-en.vsd
ZMA
ZMB
AND
AND
AND
ZMC
IRELPG
AND
AND
AND
ZMAB
ZMBC3
ZMCA
IRELPP
INDIR_A
INDIR_B
INDIR_3
OR
OR
OR
OR
INDIR_CA
INDIR_BC
INDIR_AB
PHSEL_G
PHSEL_A
PHSEL_B
PHSEL_C
OR
PHSEL_PP
15 ms
0
15 ms
0
15 ms
0
15 ms
0
15 ms
0
ANSI00000545 V3 EN
Figure 62:
Composition on non-directional phase selection signals
Composition of the directional (forward and reverse) phase selective signals is presented
schematically in figure
and figure
. The directional criteria appears as a condition for
the correct phase selection in order to secure a high phase selectivity for simultaneous and
evolving faults on lines within the complex network configurations. Internal signals
DFWn and DFWnm present the corresponding directional signals for measuring loops
with phases Ln and Lm. Designation FW (figure
) represents the forward direction as
well as the designation RV (figure
) represents the reverse direction.
Figure
presents additionally a composition of a STCNDZI output signal, which is
created on the basis of impedance measuring conditions. This signal can be configured to
PHSEL functional input signals of the distance protection zone and this way influence the
operation of the phase-to-phase and phase-to-ground zone measuring elements and their
phase related pickup and tripping signals.
1MRK 506 335-UUS A
Section 6
Impedance protection
143
Technical manual
Содержание REL650 series
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