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Section 10
Testing functionality by secondary injection
10.3.1.2
10.3.2
10.3.2.1
88
7.
If used, measure the alarm level operating value. Increase the voltage and make
note of the operate value U>Alarm. This is done with manual test and without
trip of the test set.
8.
Measure the operating time on the alarm output by connecting the stop of the test
set to an output from tAlarm. Inject a voltage 1.2 ˣ U>Alarm and measure the
alarm time.
9.
Check that trip and alarm outputs operate according to the configuration logic.
10. Finally check that start and alarm information is stored in the event menu and if
a serial connection to the SA is available verify that the correct and only the
required signals are presented on the local HMI and on the SCADA system.
Information on how to use the event menu is found in the operator's
manual.
Completing the test
Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.
Additional security logic for differential protection LDRGFC
Verifying the settings
Prepare the IED for verification of settings outlined in section 1 "Overview" and
section 2 "Preparing for test" in this chapter.
Current variation local criteria
Procedure
1.
Set Operation to On.
2.
Connect the test set for three phase current injection to the appropriate IED
terminals.
3.
Inject symmetrical phase currents equal to half the rated current
4.
Increase the injected current in phase L1 slowly by more than the set ICV>. No
signal shall be activated.
5.
Decrease the injected current in phase L1 to half the rated current.
6.
Increase the injected current in phase L1 in a step by more than the set ICV>.
Start shall be activated.
Undervoltage criteria
Procedure
1MRK 506 355-UEN A
Line distance protection REL670 2.1 IEC
Commissioning manual
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