ABB Relion 670 series - Page 542

-3V
0
3I
0
RCA = -90°, ROA = 90°
= ang(3I
0
) – ang(V
ref
)
3I
0
cos
V
ref
en06000649_ansi.vsd
ANSI06000649 V1 EN
Figure 278: Characteristic for RCADir equal to -90°
When OpModeSel is set to 3I03V0Cosfi the apparent residual power component in the
direction is measured.
When OpModeSel is set to 3I0 and fi the function will operate if the residual current is
larger than the setting INDirPU and the residual current angle is within the sector RCADir
± ROADir.
The characteristic for this OpModeSel when RCADir = 0° and ROADir = 80° is shown in
figure
279.
Section 9 1MRK 506 369-UUS -
Current protection
536 Line distance protection REL670 2.2 ANSI
Application manual