ABB Relion 650 Series Technical Manual page 105

1MRK 506 326-UUS B
ANSI05000201 V2 EN-US
Figure 53: Composition of phase selection signals for forward direction
Figure 54
NDIR_PP, FWD_PP and REV_PP are the equivalent to internal signals NDIR_G, FWD_G and REV_G,
but for the phase-to-phase loops.
Line distance protection REL650
Technical manual
INDIR_A
DFW_A
INDIR_AB
DFW_AB
INDIR_CA
DFW_CA
INDIR_B
DFW_B
INDIR_AB
INDIR_BC
DFW_BC
INDIR_C
DFW_C
INDIR_BC
INDIR_CA
presents the composition of output signals TRIP and PICKUP, where internal signals
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AND
AND OR
AND
OR
AND
AND OR
AND
AND
AND OR
AND
OR
AND
15 ms 15 ms
AND OR
t
15 ms
AND
15 ms
AND
15 ms
15 ms 15 ms
AND OR
t
AND
15 ms
15 ms
AND
15 ms
Section 5
Impedance protection
FWD_IPH
t
FWD_A
t
FWD_G
t
FWD_B
t
FWD_2PH
t
FWD_C
t
FWD_3PH
t
FWD_PP
t
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