two phase-to-ground faults with one phase current are tested. The result shall be according to Table
37. It should be checked that the fault will give phase-to-phase voltage, phase-to-ground voltage,
zero-sequence voltage and phase current so that the conditions set for the logic are fulfilled.
Table 37: Operation at different combinations of faults and operation mode
OperMode Fault type/Faulted phase current to the IED
A_BG/IA A_BG/IB B_CG/IB B_CG/IC C_CG/IA C_AG/IC
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
11.4.15.3 Completing the test
GUID-8BD66BC8-AAC3-41C4-B819-B159361688D2 v5
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.4.16 Under impedance protection for Generator ZGVPDIS
GUID-F882501B-6A03-4409-BF70-DE1CF09E5541 v3
Prepare the IED for verification of settings.
Values of the logical signals for ZGVPDIS are available on the local HMI under Main menu /Tests /
Function status /Impedance /ZGVPDIS (21G, Z<) /1:ZGVPDIS:ZGVPDIS . The Signal Monitoring in
PCM600 shows the same signals that are available on the local HMI.
11.4.16.1 Verifying the settings
GUID-202C5606-5F12-4C00-A12F-02A33EB571D9 v1
GUID-69610335-7C97-4134-8A47-05501AB5C620 v3
Distance protection zones
While measuring operating characteristics, keep the current constant. Keep the current as close as
possible to its rated value or lower, however make sure it is higher than 30% of the rated current.
If the measurement of the operating characteristics runs under constant voltage conditions, ensure that
the maximum continuous current in an IED does not exceed four times its rated value.
To verify the zone 1 mho characteristic, at least two points must be tested.
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
164 Transformer protection RET670
Commissioning manual
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