Example
The CT ratios
for all three phases is 1000 A, IBase is 1000 A, and the
following secondary currents are applied:
IA
Ampl = 1.1 A Angl = 15 deg
IB Ampl = 0.6 A Angl = 97 deg
IC Ampl = 1.3 A Angl = -135 deg
The service value output NSCURR indicating amplitude of negative sequence current
in primary amperes should be 962A approximative.
13.5.12.2 Completing the test
GUID-DA67F057-00AD-4391-B50E-047FD6C16EBB v1
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.
13.5.13 Accidental energizing protection for synchronous generator
AEGPVOC (50AE)
GUID-6E141754-28E5-408D-955F-899720BA59E0 v2
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to
verify settings".
13.5.13.1 Verifying the settings
GUID-B834BA0F-E8CE-4B08-9FCE-B6D2813D3197 v3
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 (pickup 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.
7. Check that all trip and pickup contacts operate according to the configuration
(signal matrises).
Section 13 1MRK 502 073-UUS A
Testing functionality by secondary injection
212 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual
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