ABB RELION REX640 Technical Manual page 351

Protection and control

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Table of Contents

1MRS759142 F

Directional overcurrent characteristics

The forward and reverse sectors are defined separately. The forward operation area

is limited with the

operation area is limited with the

In the forward operation area, the

counterclockwise sector and the

clockwise sector, measured from the

In the backward operation area, the

counterclockwise sector and the

clockwise sector, a measurement from the

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 ANGLE_X is not in any of the defined sectors, or the direc-

tion cannot be defined due too low amplitude

The ANGLE_X is in the forward sector

Table continues on the next page

Technical Manual

Min forward angle and Max forward angle settings. The reverse

The sector limits are always given as positive degree values.

Min reverse angle and Max reverse angle settings.

Max forward angle setting gives the

Min forward angle setting gives the corresponding

Characteristic angle setting.

Max reverse angle setting gives the

Min reverse angle setting gives the corresponding

Characteristic angle setting that has

Protection functions

The value for DIR_A/_B/_C