ABB RELION REX640 Technical Manual page 1197

1MRS759142 C
REX640
Technical Manual
Characteristic
RCA=+45 deg
Angle/
Max
Max torque line
forward
angle
I
2
Min
Forward
forward
angle
area
Min operate
current
GUID-330BB730-0008-49F7-AC16-9BFD87884A9D V1 EN
Figure 644: Configurable directional setting when "Neg. seq. volt." selection is
made using the Pol quantity setting
When Zero seq. volt. voltage selection is made using Pol quantity setting, the
directional detector module compares the angle of the residual current to the residual
voltage. Using the residual voltage as reference, the residual current angle is
compared to the Characteristic angle setting. If the angle difference is within the
operating sector selected by the Directional mode setting, the Enable signal is sent to
Timer.
The polarizing quantity (residual voltage) is inverted because of
switched voltage measurement cables, the correction can be done by
setting the Pol reversal setting to "True", which rotates the polarizing
quantity by 180 degrees.
The directional characteristic for the measured or calculated residual
power is same.
Protection related functions
-U
2
Zero torque line
Backward
Min
area
reverse
angle
Min operate
voltage
Max
reverse
angle
Section 5
1191