Hitachi Relion 670 Series Applications Manual page 143

1MRK511407-UUS Rev. N
ANSI06000649 V1 EN-US
Figure 67:
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 68.
ANSI06000652 V2 EN-US
Figure 68:
Phasor measurement unit RES670
Application manual
RCA = -90°, ROA = 90°
V
ref
3I
0
3I cos
0
= ang(3I
en06000649_ansi.vsd
Characteristic for RCADir equal to -90°
RCA = 0º
ROA = 80º
Characteristic for RCADir = 0° and ROADir = 80°
© 2017 - 2023 Hitachi Energy. All rights reserved
)
) – ang(V
0 ref
-3V
0
Operate area
3I
0
V =-3V
ref 0
ANSI06000652-2-en.vsd
Section 8
Current protection
137