Completing The Test; Four Step Residual Overcurrent Protection, (Zero Sequence Or Negative Sequence Directionality) Ef4Ptoc (51N/67N) - ABB Relion 670 Series Commissioning Manual

1MRK 511 409-UUS Rev. J
3.1. Set the injected polarizing voltage larger than the set minimum polarizing voltage (default is
3.2. Increase the injected current, note the trip value of the tested step of the function and
3.3. Decrease the current slowly, note the reset value and compare it to the reset ratio 95%.
4. If the test has been performed by injection of current in phase A, repeat the test, injecting current
into phases B and C with polarizing voltage connected to phases B, respectively C (1 out of 3
currents for operation).
5. If the test has been performed by injection of current in phases AB, repeat the test, injecting current
into phases BC and CA with the appropriate phase angle of injected currents.
6. Connect a trip output contact to a timer.
7. Set the injected current to 200% of the trip level of the tested stage, switch on the current and
check the time delay.
For inverse time curves, check the trip time at a current equal to 110% of the trip current for txMin.
8. Check that all trip and pickup contacts trip according to the configuration (signal matrixes).
9. Reverse the direction of the injected current and check that the protection does not trip.
10. If 2 out of 3 or 3 out of 3 currents are chosen for operation: Check that the function will not trip with
current in one phase only.
11. Repeat the above described tests for the higher set stages.
12. Check that pickup and trip information is stored in the event menu .
11.4.1.3

Completing the test

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.
11.4.2 Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC (51N/67N)
Prepare the IED for verification of settings outlined in Section
Values of the logical signals for D2PTOC are available on the local HMI under Main menu/Test/
Function status /Current protection/ResidualOverCurr4Step(51N_67N,4(IN>)) /
EF4PTOC(51N_67N;4(IN>)):x, where x = instance number.
The Signal Monitoring in PCM600 shows the same signals that are available on the local HMI.
Phasor measurement unit RES670
Commissioning manual
5% of VBase) and set the injection current to lag the appropriate voltage by an angle of about
80° if forward directional function is selected.
If 1 out of 3 currents are chosen for operation: The voltage angle of phase A is the reference.
If 2 out of 3 currents are chosen for operation: The phase angle of the phase-to-phase
voltage AB is the reference for APhase.
If 3 out of 3 currents are chosen for operation: The voltage angle of phase A is the reference.
If reverse directional function is selected, set the injection current to lag the polarizing voltage
by an angle equal to 260° (equal to 80° + 180°).
compare it to the set value.
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Testing functionality by secondary injection
"Preparing the IED to verify
Section 11
SEMOD56287-118 v4
SEMOD53296-3 v10
settings".
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