ABB Relion 650 Series Technical Manual page 195

1MRK 506 326-UUS B
TDSN
t
=
inv
EQUATION2032-ANSI V2 EN-US
6.7.7.4 Directional residual current protection measuring 3I
The function will operate if the residual current is larger that the set value and the angle φ =
ang(3I )-ang(V
0
ANSI06000652 V1 EN-US
Figure 100: Example of characteristic
For trip, both the residual current 3I
INDirPU and VNRelPU and the angle φ shall be in the set sector ROADir and RCADir .
When the function is activated binary output signals PICKUP and PUDIRIN are activated. If the
activation is active after the set delay
activated.
The function indicate forward/reverse direction to the fault. Reverse direction is defined as φ is
within the angle sector:
This variant shall have definite time delay.
6.7.7.5 Directional functions
For all the directional functions there are directional pickup signals PUFW: fault in the forward
direction, and PUREV: Pickup in the reverse direction. Even if the directional function is set to
Line distance protection REL650
Technical manual
( 3 I 3 V cos ( reference
ϕ
⋅ ⋅ ⋅
0 0
3 I 3 V cos ( measured )
ϕ
⋅ ⋅
0 0
) is within the sector
ref
80 80
RCADir + 180° ± ROADir
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))
RCADir ± ROADir
RCA = 0°
ROA = 80°
Operate area
3I
0
-3V
0
en06000652_ansi.vsd
and the release voltage 3V
0
tDef the binary output signals TRIP and TRDIRIN are
Current protection
and φ
0
, shall be larger than the set levels
0
Section 6
(Equation 34)
SEMOD171963-48 v2
SEMOD171963-60 v2
189