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Section 10
Testing functionality by secondary injection
110
11
X1+XN
10
40% of RLdFw
80% of RLdFw
alt. 80% of
RFPE (Load
encroachment)
IEC05000369 V3 EN
Figure 25:
Distance protection characteristic with test points for phase-to-earth
measurements
Table
28
is used in conjunction with figure 25.
Table 28:
Test points for phase-to-earth L3-E (Ohm/Loop)
Test point
Reach
Value
1
X
(2 x X1
R
0
2
X
(2 x X1
R
2 x R1
3
X
0.8 x (2 x X1
R
0.8 x (2 x R1
4
X
0.5 x (2 x X1
R
0.5 x (2 x R1
5
X
0.85 x RFPE
R
0.85 x RFPE
6
X
RLdFwset x tan(ArgLdSet)
R
RLdFw
7
X
0
R
RLdFw
8
X
–02143 x RLdFw
R
0.8 x RLdFw
Table continues on next page
X
2
1
80%
3
50%
4
12
5
120°
a
6
R (Ohm/loop)
7
13
9
20°
8
RFPE
IEC05000369-3-en.vsd
+X0
)/3
set
set
+ X0
)/3
set
set
+ R0
)/3
set
set
+ X0
)/3
set
set
+ R0
)/3 +RFPE
set
set
+ R0
)/3
set
set
+R0
)/3 + RFPE
set
set
x tan(ArgLdset)
set
set
set
set
set
1MRK 506 355-UEN A
Comments
set
set
ArgLd = angle for the maximal load
transfer
Exact: 0.8 x RFPE x tan (ArgDir=20°)
Line distance protection REL670 2.1 IEC
Commissioning manual
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