Composition of the phase pickup signals for a case, when the zone operates in a non-directional
.
ANSI09000889-1-en.vsd
NDIR_A
NDIR_B
NIDR_C
NDIR_AB
NDIR_BC
NDIR_CA
OR
OR
OR
OR
AND
AND
AND
AND
BLK
PICKUP
PU_C
PU_B
PU_A
15ms
0
15ms
0
15ms
0
15ms
0
ANSI09000889 V1 EN-US
Figure 129: Composition of pickup signals in non-directional operating mode
Results of the directional measurement enter the logic circuits, when the zone operates in
directional (forward or reverse) mode, as shown in figure
NDIR_A
DIR_A
NDIR_B
DIR_B
NDIR_C
DIR_C
NDIR_AB
DIR_AB
NDIR_BC
DIR_BC
NDIR_CA
DIR_CA
AND
AND
AND
AND
BLK
15 ms
0
15 ms
0
PU_ZMPG
PU_A
PU_B
PU_C
PICKUP
PU_ZMPP
AND
AND
AND
AND
AND
AND
OR
OR
OR
OR
OR
OR
ANSI09000888-2-en.vsd
15 ms
0
15 ms
0
ANSI09000888 V2 EN-US
Figure 130: Composition of pickup signals in directional operating mode
Tripping conditions for the distance protection zone one are symbolically presented in figure
.
Section 7
1MRK 502 066-UUS B
Impedance protection
270
Technical manual
Summary of Contents for Relion 670 series
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