ABB RES670 2.1, Commissioning Manual

Page: 130 / 202

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 for operation is chosen: 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.
11.4.1.2 Completing the test
Continue to test another function or end the test by changing the TestMode setting to
Disabled . Restore connections and settings to their original values, if they were 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 "Preparing the IED to verify
settings" .
11.4.2.1 Four step directional ground fault protection
1. Connect the test set for single current injection to the appropriate IED terminals.
Connect the injection current to terminals A and neutral.
2. Set the injected polarizing voltage slightly larger than the set minimum polarizing
voltage (default 5% of Vn) 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 trips.
4. Decrease the current slowly and note the reset value.
5. If the test has been performed by injection of current in phase A, repeat the test,
injecting current into terminals B and C with a polarizing voltage connected to
terminals B, respectively C.
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.
Section 11
1MRK 511 366-UUS -
Testing functionality by secondary injection
124
Commissioning manual