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Section 11
Testing functionality by secondary injection
1.
Connect the test set for three-phase current injection to the appropriate IED terminals as shown
in Figure
2.
Increase the injected current and note the operated value (start 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 operate level of the tested stage. Switch on the current
and check the time delay.
6.
Check that all trip and start contacts operate according to the configuration (signal matrices).
7.
Finally check that start and trip information is stored in the event memory.
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.
11.11.7.8
Zero sequence overcurrent protection LCZSPTOC
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
1.
Connect the test set for three-phase voltage injection (L1, L2, L3or 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 operated value (start 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 operate level of the tested stage. Switch on the current
and check the time delay.
6.
Check that all trip and start contacts operate according to the configuration (signal matrices).
7.
Finally check that start and trip information is stored in the event memory.
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.
11.11.7.9
Three phase overcurrent LCP3PTOC
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
1.
Connect the test set for three-phase current injection to the appropriate IED terminals.
2.
Increase the injected current in phase L1 and note the operated value (start 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 operate level of the tested stage. Switch on the current
and check the time delay.
6.
Check that all trip and start contacts operate according to the configuration (signal matrices).
7.
Finally check that start and trip information is stored in the event memory.
8.
Repeat steps 2 – 7 for phases L2 and L3.
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.
232
55
in this chapter.
in this chapter.
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1MRK 505 378-UEN Rev. K
GUID-DF48CC20-7275-4543-84D1-0856A946520A v2
"Requirements"
and section
GUID-3F003AB6-4B2F-4C70-AE84-B04E98A067DE v1
"Requirements"
and section
Line differential protection RED670
Commissioning manual
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