ABB RELION 670 Series Technical Manual page 294

Section 7
Impedance protection
INDIR_A
DRV_A
INDIR_AB
DRV_AB
INDIR_CA
DRV_CA
INDIR_B
DRV_B
INDIR_AB
INDIR_BC
DRV_BC
INDIR_C
DRV_C
INDIR_BC
INDIR_CA
ANSI00000546 V3 EN-US
Figure 144: Composition of phase selection signals for reverse direction
288
AND
AND OR 0
15 ms
AND
OR 0
15 ms
AND
AND OR 0
15 ms
INDIR_A
AND INDIR_B
INDIR_C
INDIR_AB
INDIR_BC
AND
INDIR_CA
AND OR 0
15 ms
AND
OR 0
15 ms
REV_A
REV_G
REV_B
PHSELZ
Bool to
integer
REV_C
REV_PP
ANSI00000546-3-en.vsd
1MRK 502 066-UUS B
Technical manual