ABB REL650 series Technical Manual page 149

1MRK 506 335-UUS A
Technical manual
IRELPG
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ZMA
AND
ZMB
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ZMC
ZMAB
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ZMBC3
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ZMCA
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IRELPP
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 64
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 64) represents the forward direction as
well as the designation RV (figure 63) represents the reverse direction.
Figure 63 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.
INDIR_A
INDIR_B
INDIR_3
OR 0
15 ms
0
OR
15 ms
0
OR
15 ms
OR 0
15 ms
INDIR_AB
INDIR_BC
INDIR_CA
OR 0
15 ms
and figure 63. The directional criteria appears as a condition for
Section 6
Impedance protection
PHSEL_G
PHSEL_A
PHSEL_B
PHSEL_C
PHSEL_PP
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