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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 104:
RCADir set to 0°
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 105:
RCADir set to -90°
For trip, the operating quantity 3I
0
cos φ, the residual current 3I
0
, and the residual
voltage 3U
0
must be larger than the set levels :
INCosPhi>
,
INRel>
and
UNRel>
.
Refer to the simplified logical diagram in Figure
.
Trip from this function can be blocked from the binary input BLKTRDIR.
When the function picks up, binary output signals START and STDIRIN are
activated. If the output signals START and STDIRIN remain active for the set
delay
tDef
the binary output signals TRIP and TRDIRIN get activated. The trip
from this sub-function has definite time delay.
Section 7
1MRK 506 382-UEN A
Current protection
224
Line distance protection REL650 2.2 IEC
Technical manual
Summary of Contents for RELION 650 SERIES
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