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.
5. Increase the supply currents or voltage in next 1 minute cycle such that the active or
reactive energy values are greater than the EALim and ERLim setting default values
respectively.
6. Check that EAFALM and ERFALM are high after 1 minute.
7. Similarly the testing can be done for EARALM and ERRALM outputs by changing the
power inputs directions through direction settings.
11.14.2.2 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were changed
for testing purposes.
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
282 Transformer protection RET670 2.2 ANSI
Commissioning manual
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