11.4.14.1 Completing the test
GUID-8BD66BC8-AAC3-41C4-B819-B159361688D2 v4
Continue to test another function or end the test by changing the TESTMODE
setting to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
11.4.15 Phase preference logic PPL2PHIZ
GUID-E1547542-1407-4488-AD99-2A7D063885A4 v1
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
The Phase preference logic function PPL2PHIZ is tested with a three-phase testing
equipment for distance protections. PPL2PHIZ is tested in co-operation with the
High speed distance protection ZMFPDIS . The distance protection and the phase
preference logic shall be set to values according to the real set values to be used.
The test is made by means of injection of voltage and current where the amplitude
of both current and voltage and the phase angle between the voltage and current
can be controlled.
During the test the following binary signals (outputs) shall be monitored:
• T
rip signal from distance protection
• Start signal from phase preference logic
1. Connect the test set for injection of voltage and current.
2. Inject voltages and currents corresponding to a phase-to-phase to earth fault
within zone 1 of the distance protection function. In the test one of the current
inputs (one of the faulted phases) is disconnected. The remaining current is the
fault current out on the protected line. All combinations of two phase-to-earth
faults with one phase current are tested. The result shall be according to table
34. It should be checked that the fault will give phase-to-phase voltage, phase-
to-earth voltage, zero-sequence voltage and phase current so that the
conditions set for the logic are fulfilled.
Table 35: Operation at different combinations of faults and operation mode
OperMode Fault type/Faulted phase current to the IED
L1L2N/IL1 L1L2N/IL2 L2L3N/IL2 L2L3N/IL3 L3L3N/IL1 L3L1N/IL3
No Filter Trip Trip Trip Trip Trip Trip
No Pref Trip Trip Trip Trip Trip Trip
1231c Trip No Trip Trip No Trip No Trip Trip
1321c No Trip Trip No Trip Trip Trip No Trip
123a Trip No Trip Trip No Trip Trip No Trip
132a Trip No Trip No Trip Trip Trip No Trip
213a No Trip Trip Trip No Trip Trip No Trip
231a No Trip Trip Trip No Trip No Trip Trip
312a Trip No Trip No Trip Trip No Trip Trip
321a No Trip Trip No Trip Trip No Trip Trip
Section 11 1MRK 505 378-UEN A
Testing functionality by secondary injection
170 Line differential protection RED670 2.2 IEC
Commissioning manual
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