Test point
R
X
Comment
P7
0.5
∗
RLd
-0.5
∗
RLd
∗
tan (
ArgDir
)
P8
-0.5
∗
RFPERvZx
X1Fw
P9
-0.8
∗
X1Fw
∗
tan
(
ArgNegRes - 90
)
0.8
∗
X1Fw
1.
Change the magnitude and angle of phase-to-earth voltage in phase L1 to achieve impedances
at test points P1, P2, …, P9.
2.
Test points P7 and P9 are intended to test the directional lines of impedance protection and
used to find directional accuracy for phase-to-earth faults.
3.
For each test point, observe that the start output signals START, STZx, STNDZx, STL1 and
STPE are activated.
4.
Trip signals TRIP, TRZx, TRL1 will appear after set delay time of
tPEZx
if
OpModetPEZx
is set
to On and
TimerSelZx
is set to Timers separated.
5.
Repeat the above test by injecting phase-to-earth voltage in phase L2 in accordance with test
points and steps described above and observe that the start output signals START, STZx,
STNDZx, STL2 and STPE are activated.
6.
Trip signals TRIP, TRZx, TRL2 will appear after set delay time of
tPEZx
if
OpModetPEZx
is set
to On and
TimerSelZx
is set to Timers separated.
Phase-to-phase fault—measuring element
GUID-C8EE9E16-7307-4853-B9A9-6AFCEA8807BE v2
Test points that are to be considered for measurement accuracy of set reactance reach are shown in
Figure
.
Where:
X1Fw =
X1FwZx
R1Fw =
X1FwZx
/ tan (
LineAng
)
IEC15000436-2-en.vsdx
R(Ohm/phase)
jX(Ohm/phase)
RFPPFwZx
R1 Fw
RFPPRvZx
X1Fw
RFPPFwZx
RFPPRvZx
RLd
80%
P1
P2
P3
P4
P5
P6
P7
P8
P9
ArgLd
ArgDir
ArgNegRes
IEC15000436 V2 EN-US
Figure 24:
Proposed test points for phase-to-phase loop of measuring element
1MRK 506 377-UEN Rev. K
Section 10
Testing functionality by secondary injection
Railway application RER670
93
Commissioning manual
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