ABB Relion 670 Series Commissioning Manual page 80

Section 10
Testing functionality by secondary injection
• 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
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Railway application RER670
Commissioning manual