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Section 11
Testing functionality by secondary injection
(2 x X1set+X0set)/3
IEC05000369 V5 EN-US
Figure 38:
Table is used in conjunction with figure .
Table 33:
Test point
1
2
3
4
5
6
7
8
9
Table continues on next page
124
X
2
1
11
10
12
9
8
25% of RFPEZx
50% of RFPEZx
alt. 80% of
RFPEZx
RFPEZx (Load
encroachment)
Distance protection characteristic with test points for phase-to-earth
measurements
Test points for phase-to-earth L3-E (Ohm/Loop)
Reach
Value
X
(2 x X1
+X0
set
R
0
X
(2 x X1
+ X0
set
R
2 x R1
+ R0
set
X
0.8 x (2 x X1
R
0.8 x (2 x R1
+RFPEZx
set
X
0.5 x (2 x X1
R
0.5 x (2 x R1
RFPEZx
set
X
0.85 x RFPEZx
R
0.85 x RFPEZx
X
RLdFw
x tan(ArgLd
set
R
RLdFw
set
X
0
R
RLdFw
set
X
–02143 x RLdFw
R
0.8 x RLdFw
X
–0.8 x RLdFw
R
0.8 x RLdFw
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80%
3
50%
4
5
6
R (Ohm/loop)
7
13
ArgDir
IEC05000369-5-en.vsdx
Comments
)/3
set
)/3
set
)/3
set
+ X0
)/3
set
set
+ R0
)/3
set
set
+ R0
)/3
set
set
+R0
)/3 +
set
set
x tan(ArgLd
)
ArgLd = angle for the maximal load transfer
set
set
)
Set
Exact: 0.8 x RFPEZx x tan (ArgDir=20°)
set
set
x tan(ArgDir=20°)
set
set
1MRK 504 165-UEN Rev. K
Transformer protection RET670
Commissioning manual
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