-3V
0
=V
ref
3I
0
RCA = 0°
3I
0
cos
Operate area
ROA
en06000650_ansi.vsd
ANSI06000650-2-
vsd
Vref=-3Vo
ANSI06000650 V2 EN
Figure 220: Characteristic with ROADir restriction
The function indicates forward/reverse direction to the fault. Reverse direction is
defined as 3I
0
·cos (φ + 180°) ≥ the set value.
It is also possible to tilt the characteristic to compensate for current transformer angle
error with a setting RCAComp as shown in the figure 221:
Section 7 1MRK505222-UUS C
Current protection
440
Technical reference manual
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