Completing The Test; Generator Rotor Overload Protection Grpttr; Verifying The Settings - ABB REG670 Commissioning Manual

Section 13
Testing functionality by secondary injection
13.5.15.2
13.5.16
13.5.16.1
202
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.
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
1MRK 502 073-UEN A
GUID-F79CE91E-7F07-45F4-8CDC-D7426CA9CBEA v2
GUID-4BEA4A9E-AEE1-4E4E-9D7C-ABA3499EB431 v1
GUID-2AF96028-B49E-4820-BD3D-4957E75B9C2D v2
Commissioning manual