ABB REC670 Applications Manual page 203

1MRK 511 401-UUS A
Bay control REC670 2.2 ANSI
Application manual
GlobalBaseSel: It is used to select a GBASVAL function for reference of base values.
RotResU: It is a setting for rotating the polarizing quantity (3V
This parameter is set to 180 degrees by default in order to inverse the residual voltage
(3V ) to calculate the reference voltage (-3V
0
used as the polarizing quantity for directionality, it is important to set this parameter
correctly.
With the setting OpModeSel the principle of directional function is chosen.
With OpModeSel set to 3I0cosfi the current component in the direction equal to the
characteristic angleRCADir has the maximum sensitivity. The characteristic for
RCADir is equal to 0° is shown in Figure 81.
ANSI06000648 V1 EN-US
Figure 81: Characteristic for RCADir equal to 0°
The characteristic is for RCADir equal to -90° is shown in Figure 82.
-jRCADir
e
0
V
RCA = 0°, ROA = 90°
ref
3I
0
) - ang(3V
= ang(3I
0 ref
3I cos
0
en06000648_ansi.vsd
Current protection
) by 0 or 180 degrees.
0
). Since the reference voltage is
)
-3V =V
0 ref
Section 8
197