1. Inject the magnitude and angle of phase-to-phase voltage 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-phase faults.
3. For each test point, observe that the start output signals START, STZx,
STNDZx, STL1, STL2 and STPP are activated.
4. Trip signals TRIP, TRZx, TRL1 and TRL2 will appear after set delay time of
tPPZx if OpModetPPZx is set to On and TimerSelZx is set to Timers
separated.
Testing the neutral voltage shift protection
GUID-9307ACC1-2E7C-42D1-B8E9-E7B576F7170D v1
1. Set SystemEarthing to High impedance and UMinDisp to default value.
2. Inject phase voltage and phase currents such that there is no start output
STELEMST observed from starting element. Also, make sure that residual
voltage is measured with this condition.
3. If this measured neutral voltage/residual voltage exceeds set UMinDisp value,
the outputs TRIP, TRL1 and TRL2 get activated after a set delay of tU0.
Testing the stub line with line end in-feed protection in compensated
earthed systems
GUID-20A7B775-98C9-4A66-BA9B-07A88DFA1341 v1
1. Set ModeStubLine to On and set UPPMin and KU to default values.
2. Also, set ModePhPref to Equal Priority.
3. Inject phase voltage and phase currents so that there is STIE detected for a
test condition created and no pick-up from underimpedance starting i.e.
STNDZL1 and STNDZL2 are low.
4. If the injected phase L2 voltage is higher than KU times phase L1 voltage and
injected phase-to-phase voltage is above set UPPMin value, the trip outputs
TRIP and TRL1 will be activated after a set delay of tI0Stub.
5. Similarly, if the injected phase L1 voltage is higher than KU times phase L2
voltage and injected phase-to-phase voltage is above set UPPMin value, the
trip outputs TRIP and TRL2 will be activated after a set delay of tI0Stub.
6. If ModePhPref to L1 before L2, fault on phase L2 will be cleared after
additional delay time of tGL2 (i.e. tI0Stub + tGL2) when OpModetGL2 is set
to On.
Testing the phase preference mode in compensated earthed
systems
GUID-E581EEE8-320E-4A26-A94C-AF94B64B830A v1
1. Inject phase voltage and phase current for phase L2 in accordance with test
points described in Chapter 'Phase-to-earth fault – measuring element'.
2. If ModePhPref is set to Equal priority, trip signal TRL2 will be appeared
immediately after a set delay of tPEZx.
3. If ModePhPref is set to L1 before L2, STPHPRERL2 will appear which
indicates fault has been occurred in phase L2.
Section 10 1MRK 506 377-UEN C
Testing functionality by secondary injection
98 Railway application RER670 2.2 IEC
Commissioning manual
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