Test points that are to be considered for measurement accuracy of set impedance
reach are shown in Figure 13 and Table 15.
RLd
R
jX
P1
P2
P3
P4
P5
P6
P7
P8
RLd
ArgLd
(
)
IEC15000429-2-en.vsdx
LineAng
Z1CircleStart
IEC15000429 V2 EN-US
Figure 13: Proposed test points for phase-to-earth loop of circular
characteristic in solidly earthed system
Table 15: Test points for phase-to-earth loop of circular characteristic
Test point
R X Comment
P1
Z1CircleStart
∗
cos(
LineAng
) ∗
(1+
REOverRLStart
)
Z1CircleStart
∗
sin(
LineAng
) ∗
(1+
XEOverXLStart
)
P2 0.8 ∗
Z1CircleStart
∗
cos(
ArgLd
) ∗
(1+
REOverRLStart
)
0.8 ∗
Z1CircleStart
∗
sin(
ArgLd
) ∗
(1+
XEOverXLStart
)
If 2I0 <
I0MinOp
P3
RLd
0 If 2I0 <
I0MinOp
P4 -
Z1CircleStart
∗
cos(
LineAng
) ∗
(1+
REOverRLStart
)
-
Z1CircleStart
∗
sin(
LineAng
) ∗
(1+
XEOverXLStart
)
P5 -0.8 ∗
Z1CircleStart
∗
cos(
ArgLd
) ∗
(1+
REOverRLStart
)
-0.8 ∗
Z1CircleStart
∗
sin(
ArgLd
) ∗
(1+
XEOverXLStart
)
If 2I0 <
I0MinOp
Table continues on next page
1MRK 506 377-UEN C Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC 83
Commissioning manual
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