10. Set the injected current to 226% of IBase, switch on the current and check operate time
of the trip, 10 s.
11.
Switch off the current.
12.
Finally check that start and trip information is stored in the event menu.
12.5.19.2
Completing the test
GUID-F79CE91E-7F07-45F4-8CDC-D7426CA9CBEA v2
Continue to test another function 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.
12.5.20
Generator rotor overload protection GRPTTR
GUID-4BEA4A9E-AEE1-4E4E-9D7C-ABA3499EB431 v1
12.5.20.1
Verifying the settings
GUID-2AF96028-B49E-4820-BD3D-4957E75B9C2D v2
Explained testing method is given for default value for the
k1 parameter.
The function has heating content memory features. Thus if testing shots are done
consecutively, operate time will be shortened accordingly, compared to the given operate
characteristic. Therefore, either wait until set
tReset time has elapsed, between two shots, or
reset this memory by setting the RESET input into the function to value TRUE.
Precautions if
MeasurCurrent = DC. The magnitude of the injected current have to be
decreased by multiplying it with a factor of 0.741 in order to get correct operate times when
testing with three-phase symmetrical sinusoidal currents.
1.
Connect the test set for the appropriate three-phase current injection to the IED phases
L1, L2 and L3. The protection shall be fed with a symmetrical three-phase current.
2.
Set the injected current to 113% of IBase, switch on the current and check operate time of
the trip, 120 s.
3.
Decrease the current slowly.
4.
The output signal START will reset if the measured current falls below reset level or if
BLOCK signal is set to one.
5.
Switch off the current.
6.
Set the injected current to 125% of IBase, switch on the current and check operate time
of the trip, 60 s.
7.
Switch off the current.
8.
Set the injected current to 146% of IBase, switch on the current and check operate time
of the trip, 30 s.
9.
Switch off the current.
10. Set the injected current to 209% of IBase, switch on the current and check operate time
of the trip, 10 s.
11.
Switch off the current.
12.
Set the injected current to 100% of IBase and switch on the current.
13. Decrease the current slowly under I<.
14. The signal TRIPUC will be activated when timer
tTrip_I< expires.
15. Finally check that start and trip information is stored in the event menu.
Testing the protection
GUID-6E4609B9-62AB-453D-8FCE-59F9F41AB59D v1
12.5.20.2
Completing the test
GUID-B4B2C5EF-DA21-4E89-874E-DD94D52D904B v2
Continue to test another function 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
Section 12
1MRK 502 067-UEN B
Testing functionality by secondary injection
182
Commissioning manual
