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1MRK 506 355-UEN A
10.4.1.1
Line distance protection REL670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
Table 18:
Test points for phase-to-earth L3-E (Ohm/Loop)
Test point
Reach
Value
1
X
R
2
X
R
3
X
R
4
X
R
5
X
R
6
X
R
7
X
R
8
X
R
9
X
R
10
X
R
11
X
R
12
X
R
13
X
R
Measuring the operating limit of set values
Procedure:
1.
Subject the IED to healthy normal load conditions for at least two seconds.
2.
Apply the fault condition and slowly decrease the measured impedance to find
the operating value of the phase-to-phase fault for zone 1 according to test point
1 in figure
14
and table 17. Compare the result of the measurement with the set
value.
3.
Repeat steps
1
to
2
(2 x X1
+X0
)/3
set
set
0
(2 x X1
+ X0
)/3
set
set
2 x R1
+ R0
)/3
set
set
0.8 x (2 x X1
+ X0
)/3
set
set
0.8 x (2 x R1
+ R0
)/3 +RFPE
set
set
0.5 x (2 x X1
+ R0
)/3
set
set
0.5 x (2 x R1
+R0
)/3 + RFPE
set
set
0.85 x RFPE
x tan(ArgLdset)
set
0.85 x RFPE
RLdFwset x tan(ArgLdSet)
RLdFw
set
0
RLdFw
set
–0.1072 x RLdFw
set
0.4 x RLdFw
set
–0.8 x RLdFw
x tan(ArgDir=20°)
set
0.8 x RLdFw
set
0.17 x (2 x X1
+ X0
)
set
set
-0.36 x (2 x X1
+ X0
)
set
set
0.27 x (2 x X1
+X0
)
set
set
–0.57 x (2 x X1
+ X0
)
set
set
0.5 x (2 x X1
+ X0
)/3
set
set
0.5 x (2 x R1
+ R0
)/3
set
set
0
RFPE
to find the operating value for test points 2, 3 in table 17.
Section 10
Comments
set
set
ArgLd = angle for the maximal load
transfer
Exact: 0.4 x RFPE x tan (ArgDir=20°)
Exact: 0.5 x (2 x X1
X0
set
Exact: 0.5 x (2X1
+ X0
set
tan(AgNegDir=30°)
Exact: 0.8 x (2 x X1
+ X0
set
Exact: 0.8 x (2X1set + X0set)/(3 x
tan(AgNegDir=30°)
Only used when RLdFw > RFPE
)/3
set
)/(3 x
set
)/3
set
93
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