ROADir
is Relay Operating Angle.
ROADir
is identifying a window around the
reference direction in order to detect directionality. Figure
made by the
ROADir
.
Operate area
ROADir
IEC06000650_2_en.vsd
=
o
0
RCADir
0
3
I
j
0
3
×
j
I cos
-
=
0
3
ref
U
U
IEC06000650 V2 EN
Figure 178:
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
1MRK502052-UEN B
Section 8
Current protection
395
Technical manual
Summary of Contents for Relion REG670
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