4.1.2.7 Directional overcurrent characteristics
The forward and reverse sectors are defined separately. The forward operation area
is limited with the
Min forward angle
and
Max forward angle
settings. The reverse
operation area is limited with the
Min reverse angle
and
Max reverse angle
settings.
The sector limits are always given as positive degree values.
In the forward operation area, the
Max forward angle
setting gives the
counterclockwise sector and the
Min forward angle
setting gives the corresponding
clockwise sector, measured from the
Characteristic angle
setting.
In the backward operation area, the
Max reverse angle
setting gives the
counterclockwise sector and the
Min reverse angle
setting gives the corresponding
clockwise sector, a measurement from the
Characteristic angle
setting that has
been rotated 180 degrees.
Figure 209: Configurable operating sectors
Table 393: Momentary per phase direction value for monitored data view
Criterion for per phase direction information The value for DIR_A/_B/_C
The ANGLE_X is not in any of the defined sectors, or the direc-
tion cannot be defined due too low amplitude
0 = unknown
The ANGLE_X is in the forward sector 1 = forward
Table continues on the next page
1MRS759142 F Protection functions
REX640
Technical Manual
351
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