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=
=
o
o
0 ,
90
RCADir
ROADir
0
3I
j =
-
0
ref
ang(3I ) ang(3U )
-
=
0
ref
3U
U
0
3I cos
×
j
IEC06000648-4-en.vsd
IEC06000648 V4 EN-US
Figure 287: Characteristic for RCADir equal to 0°
The characteristic is for
RCADir equal to -90° is shown in Figure
.
IEC06000649_3_en.vsd
ref
U
= −
=
90 ,
90
RCADir
ROADir
0
3
I
0
3
⋅
ϕ
I cos
ϕ =
−
0
(3 )
(
)
ref
ang I
ang U
−
0
3
U
IEC06000649 V3 EN-US
Figure 288: Characteristic for RCADir equal to -90°
When
OpMode is set to 3U03I0cosfi the apparent residual power component in the direction is
measured.
When
OpMode is set to 3I0 and fi the function will operate if the residual current is larger than
the setting
INDir> and the residual current angle is within the sector RCADir ± ROADir.
The characteristic for this
OpMode when RCADir = 0° and ROADir = 80° is shown in figure
1MRK 505 343-UEN B
Section 8
Current protection
439
Application manual
Содержание Relion 670 series
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