ABB Relion 670 Series Technical Reference Manual page 277

1MRK505222-UUS C
Technical reference manual
reverse direction. The zone measurement function filter out the relevant signals on the
DIRCND input depending on the setting of the parameter OperationDir. It shall be
configured to the DIRCND output on the Directional impedance element for mho
characteristic (ZDMRDIR,21D) function.
PHSEL
AND
AG
AND
BG
AND
CG
LOVBZ
OR
BLOCK
ANSI06000408 V1 EN
Figure 136: Conditioning by a group functional input signal PHSEL
Composition of the phase pickup signals for a case, when the zone operates in a non-
directional mode, is presented in figure 137.
NDIR_A
NDIR_B
NDIR_C
BLK
ANSI06000409 V1 EN
Figure 137: Composition of pickup signals in non-directional operating mode
Impedance protection
OR
OR
AND
AND
15 ms
AND
15 ms
AND
15 ms
AND
OR
15 ms
Section 6
NDIR_A
NDIR_B
NDIR_C
NDIR_G
PHPUND
BLK
en06000408_ansi.vsd
PU_A
0
PU_B
0
PU_C
0
PICKUP
0
en06000409_ansi.vsd
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