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Section 12
Testing functionality by secondary injection
12.5.12.2
12.5.13
12.5.13.1
170
to 10% of rated generator current, then TR1 and TRIP signals operates at time
equal to 250 sec ± tolerance.
10. Repeat the above-described tests for the step 2 of the function excluding the
inverse time testing.
11. Finally check that start and trip information is stored in the event menu.
Example
CTprim
The CT ratios
CT
sec
following secondary currents are applied:
IL1
IL2
IL3
The service value output NSCURR indicating amplitude of negative sequence current
in primary amperes should be 962A approximative.
Completing the test
Continue to test another functions or end the test by changing the Test mode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes. Make sure that all built-in features for this function, which shall be
in operation, are enabled and with correct settings.
Accidental energizing protection for synchronous generator
AEGPVOC
Prepare the IED for verification of settings outlined in section
section
"Preparing for test"
Verifying the settings
1.
Connect the test set for three-phase current injection and for three phase voltage
injection to the appropriate IED terminals.
2.
Inject zero voltage to the IED.
3.
Increase the injected symmetric three phase current slowly and note the operated
value (start value) of the studied step of the function.
4.
Decrease the current slowly and note the reset value.
5.
Connect a trip output contact to a timer.
6.
Set the injected current to 200% of the operate level of the tested stage, switch
on the current and check the time delay.
for all three phases is 1000 A, IBase is 1000 A, and the
Ampl = 1.1 A
Ampl = 0.6 A
Ampl = 1.3 A
in this chapter.
1MRK502053-UEN B
Angl = 15 deg
Angl = 97 deg
Angl = -135 deg
"Requirements"
Generator protection REG670 2.0 IEC
Commissioning manual
and
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Table of Contents
Troubleshooting
