Directional Overcurrent Characteristics - ABB RELION Series Technical Manual

Section 4
Protection functions
4.1.2.6
230
Table 238: Measurement modes supported by (F)DPHxPDOC stages
Measurement mode
RMS
DFT
Peak-to-Peak

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.
(F)DPHLPDOC
x
x
x
1MRS758755 A
DPHHPDOC
x
x
x
REC615 and RER615
Technical Manual