ABB Relion 650 Series Technical Manual page 192

Section 6
Current protection
ANSI06000648 V1 EN-US
Figure 96: RCADir set to 0°
ANSI06000649 V1 EN-US
Figure 97: RCADir set to -90°
For trip, both the residual current 3I
set levels:
When the function is activated binary output signals PICKUP and PUDIRIN are activated. If the
activation is active after the set delay
activated. The trip from this sub-function has definite time delay.
186
V
RCA = 0°, ROA = 90°
ref
= ang(3I
RCA = -90°, ROA = 90°
V
ref
3I
0
3I cos
0
= ang(3I
INCosPhiPU and VNRelPU .
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3I
0
) - ang(3V )
0 ref
-3V =V
0
3I cos
0
en06000648_ansi.vsd
)
) – ang(V
0 ref
-3V
0
en06000649_ansi.vsd
·cos φ and the release voltage 3V
0
tDef the binary output signals TRIP and TRDIRIN are
ref
, must be larger than the
0
Line distance protection REL650
1MRK 506 326-UUS B
Technical manual