Table of Contents
Advertisement
Section 10
Testing functionality by secondary injection
Test point
P14
P15
P16
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.
Testing the residual overcurrent starting element
Inject currents in both the phases such that the residual current (2I0) is measured and if it exceeds
KI0Stab times maximum current measured in both the phases and also make sure that the residual
current exceeds I0MinOp value, the outputs STELEMST and STIE are activated.
Testing the phase selection element
1.
Create a phase-to-earth fault as described in phase-to-earth fault for underimpedance start in
solidly earthed system.
2.
Distance measuring loops L1E and L2E will be released if there were respective start signals
from L1E and L2E loops of underimpedance starting element and residual overcurrent start.
The output STCND would become 1 or 2.
3.
Create a phase-to-phase fault as described in phase-to-phase fault for underimpedance start in
solidly earthed system.
4.
Distance measuring loop L1L2 will be released if there is start output from phase-to-phase loop
of underimpedance start and no start output from residual overcurrent start. The output STCND
would become 4.
5.
Three measuring loops will be released for distance measurement after delayed start output
from residual overcurrent start by tI0 if there were no start output from underimpedance starting
and ModeStubLine set to Off. The output STCND would become 15.
Testing the end zone timer function
End zone timer logic acts as remote back-up to the distance protection and utilizes the output signals
from underimpedance and residual overcurrent starting elements.
1.
To test end zone 1, set OpModetEnd1 to On.
2.
Set OpDirEnd1 to Forward, OpModeEndI0 to Off and tEnd1 to default value.
3.
Inject phase voltage and phase current in accordance with Chapter 'Phase-to-earth fault -
circular characteristic' for test points P1, P2 and P3 or Chapter 'Phase-to-earth fault -
quadrilateral characteristic' for test points P1, P2, P3, P4 and P5 if SystemEarthing is chosen
as Solidly.
4.
If OpDirEnd1 is set to Non-directional, the injected phase voltage and phase current will be in
accordance with Chapters 'Phase-to-earth fault – circular characteristic' and 'Phase-to-earth
fault - quadrilateral characteristic' when SysemEarthing is chosen as solidly.
5.
If OpModeEndI0 is set to On, residual overcurrent based tripping will take place if there were
no pick-up from underimpedance starting.
6.
Trip outputs TRIP, TRL1, TRL2 and TREND1 activated after set delay of tEnd1.
7.
Repeat the above steps to test end zone 2 logic.
80
R
RFPPStart
-0.8 ∗ RFPPStart
-RFPPStart
© 2017 - 2022 Hitachi Energy. All rights reserved
X
-0.8 * X1Start
0.8 ∗ RFPPStart ∗
tan(ArgLd)
0.8 ∗ X1Start
Railway application RER670
1MRK 506 377-UEN Rev. L
Comment
GUID-500B662C-8018-4394-97FA-B0BA9DE386BD v2
GUID-5DEC7D87-6C8B-463E-9204-F834881380CD v2
GUID-C650B5C8-789F-4023-A410-B4EEA06E728E v2
Commissioning manual
Advertisement
Table of Contents
