ABB RED670 Commissioning Manual page 107

1MRK 505 378-UUS Rev. J
7. Repeat points 3– 6 for phases B and C.
8. Inject symmetrical phase voltages equal to the rated voltage.
9. Decrease the injected phase-phase voltage A-B and note the operated value (start value) of the
function.
10. Increase the voltage slowly and note the reset value.
11. Connect a trip output contact to a timer.
12. Reduce the injected voltage stepwise to 90 % of the trip level, and check the time delay.
13. Repeat points 9 – 12 for phases B-C and C-A.
Zero sequence overcurrent criteria
Procedure
1. Connect the test set for three phase voltage injection (A, B, C) or residual voltage injection (N) to
the appropriate IED terminals. This is dependent on how the IED is fed from the CT .
2. Increase the injected zero sequence current and note the trip value (pickup value) of the studied
step of the function.
3. Decrease the current slowly and note the reset value.
4. Connect a trip output contact to a timer.
5. Set the injected current to 200 % of the trip level of the tested stage, switch on the current and
check the time delay.
Low current criteria
Procedure
1. Connect the test set for three phase current injection to the appropriate IED terminals.
2. Inject a symmetrical three phase current larger than the set value PU_37
3. Decrease the injected current in phase A and note the trip value (pickup value) of the studied step
of the function.
4. Increase the current slowly and note the reset value.
5. Connect a trip output contact to a timer.
6. Decrease the injected current stepwise to 50 % of the trip level and check the time delay.
7. Repeat steps 3 – 6 for phases B and C.
11.3.5.2 Completing the test
Continue to test another function or end the test by changing the test mode setting to disabled. Restore
connections and settings to their original values, if they were changed for testing purposes.
11.4 Impedance protection
11.4.1 Distance protection zones, quadrilateral characteristic ZMQPDIS
(21)
Prepare the IED for verification of settings outlined in Section
Line differential protection RED670
Commissioning manual
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Testing functionality by secondary injection
GUID-27C0852A-008D-4107-8346-AB6A85043B7E v2
GUID-64C0F94F-5DC8-476C-B8B5-2B80F2B42692 v2
GUID-BE74F565-7465-4300-B2A6-D99CE8844147 v2
GUID-AF589812-9034-4DA4-B081-E3ACBA947058 v9
"Preparing the IED to verify
Section 11
SEMOD53525-1 v2
settings".
101