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1MRK502053-UEN B
12.5.15.2
12.5.16
12.5.16.1
Generator protection REG670 2.0 IEC
Commissioning manual
Testing functionality by secondary injection
two shots, or reset this memory by setting the RESET input into the function to value
TRUE
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 116% 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 120% 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 154% 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 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.
Completing the test
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.
Generator rotor overload protection GRPTTR
Verifying the settings
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.
Section 12
175
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Troubleshooting
