ABB RELION REX640 Technical Manual page 1289

Protection and control

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1MRS759142 F

Characteristic

Max torque line

Figure 730: Configurable directional setting when "Neg. seq. volt." selection is made

using the Pol quantity setting

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

operating sector selected by the

Technical Manual

Zero seq. volt. voltage selection is made using Pol quantity setting, the

Characteristic angle setting. If the angle difference is within the

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

The directional characteristic for the measured or calculated residual

power is same.

Zero torque line

Directional mode setting, the Enable signal is sent

Protection related functions