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
0
) by 0 or 180 degrees.
This parameter is set to 180 degrees by default in order to inverse the residual voltage
(3V
0
) to calculate the reference voltage (-3V
0
e
-jRCADir
). Since the reference voltage is
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
279.
-3V
0
=V
ref
3I
0
RCA = 0°, ROA = 90°
= ang(3I
0
) - ang(3V
ref
)
3I
0
cos
en06000648_ansi.vsd
V
ref
ANSI06000648 V1 EN-US
Figure 279: Characteristic for RCADir equal to 0°
The characteristic is for RCADir equal to -90° is shown in Figure
280.
Section 9 1MRK 504 163-UUS A
Current protection
562 Transformer protection RET670 2.2 ANSI
Application manual
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