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=
=
0 ,
0
RCADir
ROADir
0
3I
ϕ =
−
0
ref
ang(3I ) ang(3U )
−
=
0
ref
3U
U
0
3I cos
⋅
ϕ
IEC06000648-3-en.vsd
IEC06000648 V3 EN
Figure 63:
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
Figure 64:
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
RCADir
= 0° and
ROADir
Section 6
1MRK 505 291-UEN A
Current protection
128
Application manual
Summary of Contents for Relion REQ650
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