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Section 11
Testing functionality by secondary injection
11.12.2.1
Verifying the settings
Common test equipment can be used to determine the injection of current and voltage and time
measurement.
Verification of EAFACC & ERFACC output
1.
Connect the test set for injection of three-phase currents and three-phase voltage to the appropriate
current and voltage terminals of the IED.
2.
Ensure the instantaneous values of active and reactive power from CVMMXN function block are
connected to ETPMMTR function block active and reactive power inputs.
3.
Enable the EnaAcc setting and set tEnergy as 1 minute.
4.
Activate the STARTACC input and supply the IED with three-phase currents and voltages at their
rated value.
5.
Check that the ACCINPRG signal appears continuously.
6.
Note the EAFACC and ERFACCvalue after 1 minute and compare it with calculated energy value.
7.
Similarly check after each 1 minute whether the calculated integrated energy value and EAFACC and
ERFACC outputs are matching.
8.
After some time (multiple of minute) remove the current and voltage input from CVMMXN function
block.
9.
Check the EAFACC and ERFACC output in the next 1 minute cycle for the retaining the same value.
10. Activate STOPACC input after some time and supply the IED with same current and voltage.
11. Check that the ACCINPRG signal disappears immediately and EAFACC and ERFACC outputs also
stop updating.
12. Similarly the testing can be done for EAFACC and ERFACC outputs by changing the power inputs
directions through direction settings.
Verification of MAXPAFD & MAXPRFD outputs
1.
Repeat the above test steps 1 to 2.
2.
Set tEnergy setting as 1 minute and supply the IED with three-phase currents and voltages at their
rated value till 1 minute.
3.
Check the MAXPAFD and MAXPRFD outputs after 1 minute and compare it with last 1 minute average
power values.
4.
Increase either three-phase current or voltage above the last 1 minute value.
5.
After 1 minute check the MAXPAFD and MAXPRFD whether it is showing the last 1 minute average
power value as maximum.
6.
Next 1 minute cycle reduce the current or voltage below previous value.
7.
Check after 1 minute whether the MAXPAFD and MAXPRFD outputs are retaining the old maximum
value.
8.
Similarly the testing can be done for MAXPAFD and MAXPRFD outputs by changing the power inputs
directions through direction settings.
Verification of EAFALM & ERFALM outputs
1.
Repeat the above test steps 1 to 2.
2.
Set tEnergy setting as 1 minute and supply the IED with three-phase currents and voltages at their
rated value till 1 minute.
3.
Ensure that the active and reactive energy values are less than the EALim and ERLim setting
default values respectively.
4.
Check that EAFALM and ERFALM are low.
146
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1MRK 511 409-UUS Rev. K
GUID-F8F0D384-BC70-48CA-817E-EB9BFBD68A54 v3
Phasor measurement unit RES670
Commissioning manual
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