ABB Relion 611 Series, Technical Manual

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Table 95: Measurement modes supported by DPHxPDOC stages
Measurement mode DPHLPDOC DPHHPDOC
RMS x x
DFT x x
Peak-to-Peak x x
4.1.2.6 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.
Relay characteristic angle (RCA) is set positive if the operating current lags the
polarizing quantity and negative if the operating current leads the polarizing quantity.
1MRS757454 D
Section 4
Protection functions
611 series 113
Technical Manual