Completing The Test - ABB RET670 Installation And Commissioning Manual

Section 13
Verifying settings by secondary injection
13.5.7.1
134
The phase preference logic function PPLPHIZ is tested with a three-phase testing
equipment for distance protections. PPLPHIZ is tested in co-operation with the
distance protection zone, quadrilateral characteristic function ZMQPDIS. 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:
• Trip 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
26. 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.
3. The same test is done for a phase-to-phase fault in zone 2.
Table 26: Operation at different combinations of faults and operation mode
OperMode Fault type/Faulted phase current to the IED
L1L2N/IL1
No Filter Trip
No Pref Trip
1231c Trip
1321c No Trip
123a Trip
132a Trip
213a No Trip
231a No Trip
312a Trip
321a No Trip

Completing the test

Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
L1L2N/IL2 L2L3N/IL2 L2L3N/IL3
Trip Trip
Trip Trip
No Trip Trip
Trip No Trip
No Trip Trip
No Trip No Trip
Trip Trip
Trip Trip
No Trip No Trip
Trip No Trip
1MRK 504 088-UEN C
L3L3N/IL1 L3L1N/IL3
Trip Trip Trip
Trip Trip Trip
No Trip No Trip Trip
Trip Trip No Trip
No Trip Trip No Trip
Trip Trip No Trip
No Trip Trip No Trip
No Trip No Trip Trip
Trip No Trip Trip
Trip No Trip Trip
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