Four Step Directional Earth Fault Protection; Four Step Non-Directional Earth Fault Protection; Completing The Test; Four Step Negative Sequence Overcurrent Protection Ns4Ptoc - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UEN Rev. K
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11.4.4.2

Four step directional earth fault protection

1. Connect the test set for single current injection to the appropriate IED terminals.
Connect the injection current to terminals L1 and neutral.
2. Set the injected polarizing voltage slightly larger than the set minimum polarizing voltage (5% of
Ur) and set the injection current to lag the voltage by an angle equal to the set reference
characteristic angle (AngleRCA), if the forward directional function is selected.
If reverse directional function is selected, set the injection current to lag the polarizing voltage
by an angle equal to RCA+ 180°.
3. Increase the injected current and note the value at which the studied step of the function
operates.
4. Decrease the current slowly and note the reset value.
5. If the test has been performed by injection of current in phase L1, repeat the test, injecting
current into terminals L2 and L3 with a polarizing voltage connected to terminals L2,
respectively L3.
6. Block lower set steps when testing higher set steps according to the instructions that follow.
7. Connect a trip output contact to a timer.
8. Set the injected current to 200% of the operate level of the tested step, switch on the current
and check the time delay.
For inverse time curves, check the operate time at a current equal to 110% of the operate
current for txMin.
9. Check that all operate and start contacts operate according to the configuration (signal
matrixes).
10. Reverse the direction of the injected current and check that the step does not operate.
11. Check that the protection does not operate when the polarizing voltage is zero.
12. Repeat the above described tests for the higher set steps.
13. Finally, check that start and trip information is stored in the event menu.
11.4.4.3

Four step non-directional earth fault protection

1. Do as described in
11.4.4.4

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.4.5

Four step negative sequence overcurrent protection NS4PTOC

Prepare the IED for verification of settings as outlined in section
Bay control REC670
Commissioning manual
Product History
revision
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4 -
2.2.4 The phase selection logic is added to allow phase segregated trip. The new phase
selections outputs added to this release are PHSELL1, PHSELL2 and PHSELL3. The
setting EnPhaseSel is added to enable or disable phase selection. The maximum value
changed to 2000.0 % of IBase for IMin1, IMin2, IMin3 and IMin4 settings.
2.2.5 The harmonic restrain function changed to freeze the definite and IDMT timers.
Section 11.4.4.2, but without applying any polarizing voltage.
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Testing functionality by secondary injection
GUID-EB1A8DFD-5BAC-4024-ADA2-D9BE7A2B50A0 v2
"Preparing for test" in this chapter.
Section 11
SEMOD53296-208 v8
SEMOD53296-202 v5
SEMOD53296-122 v5
91