Test point R X Comment
P7 0 -
X1Start
P8 -(
X1Start
/
tan(
LineAng
))
-
X1Start
P9 -
RFPPStart
-0.8 ∗
X1Start
P10 -0.8 ∗
RFPPStart
-0.8 ∗
RFPPStart
∗
tan(
ArgLd
)
P11 -
RLd
0
P12 -
RFPPStart
0 If
OpLoadEnch
=
Off
P13 0.8 ∗
RFPPStart
-0.8 ∗
RFPPStart
∗
tan(
ArgLd
)
P14
RFPPStart
-0.8 *
X1Start
P15 -0.8 ∗
RFPPStart
0.8 ∗
RFPPStart
∗
tan(
ArgLd
)
P16 -
RFPPStart
0.8 ∗
X1Start
1. Change the magnitude and angle of phase-to-phase voltage to achieve
impedances at test points P1, P2, …, P16.
2. For each test point, observe that the output signals STELEMST, STNDZL1
and STNDZL2 are activated.
Compensated/high impedance earthed systems
GUID-4F0E1FFA-7356-4429-8CFD-C78A5E61CEDA v1
1. Select type of earthing system by setting parameter SystemEarthing and set to
either Compensated or High impedance.
2. Select CharStartZ< to Circular and set OpLoadEnch to On.
3. Set Z1CircleStart, REOverRLStart, XEOverXLStart, LineAng and ArgLd to
default values. Also, set RLd such that its value is lower than Z1CircleStart.
Phase-to-earth fault – circular characteristic
GUID-F98052A3-2D77-4792-A07E-ADD61717C70A v2
Test points that are to be considered for measurement accuracy of set impedance
reach are shown in Figure
17 and Table 19.
1MRK 506 377-UEN C Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC 89
Commissioning manual
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