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Section 10
Testing functionality by secondary injection
cases where the load encroachment characteristic is not activated, tests according to the adjusted
figures should be carried out.
To verify the settings, the operating points according to the following fault types should be tested:
•
One phase-to-earth fault
•
One phase-to-phase fault
Set Operation to On always to check for performance of distance protection during testing.
Circular characteristic
Select type of earthing system by setting parameter SystemEarthing and set to Solidly. Also, Select
CharStartZ< to Circular and set OpLoadEnch to On. Set Z1CircleStart, REOverRLStart,
XEOverXLStart, LineAng and ArgLd to default values. Also, set RLd such that its value is lower than
Z1CircleStart, that is, encroached into operating region.
Phase-to-earth fault
Test points that are to be considered for measurement accuracy of set impedance reach are shown
in
Figure 13
IEC15000429 V3 EN-US
Figure 13:
74
and
Table
15.
jX(Ohm/loop)
P8
P6
RLd
P5
P4
Proposed test points for phase-to-earth loop of circular characteristic in solidly
earthed system
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P1
Z1CircleStart
P2
ArgLd
LineAng
P3
R (Ohm/loop)
RLd
P7
IEC15000429-3-en.vsdx
1MRK 506 377-UEN Rev. L
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Railway application RER670
Commissioning manual
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