Verifying The Settings - ABB RET670 Commissioning Manual

1MRK 504 165-UEN A
11.13.3.1
Transformer protection RET670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection

Verifying the settings

1. Connect the test set for the injection of a three-phase current to the appropriate
current terminals of the IED.
2. If current need to be injected for a particular test, it should be done in the
phase selected by the PhSel parameter.
3. Follow the sequence for positioning the auxiliary contacts before testing:
POSCLOSE
POSOPEN
4. Test of CB contact travel time
4.1. Test the set timing defined by OpenTimeCorr, CloseTimeCorr,
tTrOpenAlm and tTrCloseAlm.
4.2. Change the status of the auxiliary contacts such that travel time to open
TTRVOP and travel time to close TTRVCL exceed the respective set
values (tTrOpenAlm and tTrCloseAlm). The measured travel time for
opening and closing is shown on TTRVOP and TTRVCL respectively.
4.3. Check that TRVTOPAL and TRVTCLAL are activated.
5. Test of CB status
5.1. Test the set current level defined by AccStopCurr.
5.2. Check the CLOSEPOS output by changing the POSOPEN to 0 and
POSCLOSE to 1.
5.3. Check the OPENPOS output by changing the POSOPEN to 1 and
POSCLOSE to 0 and also inject the current in the selected phase slightly
lower and higher than AccStopCurr set value. Only for a current lower
than set AccStopCurr should activate the output POSOPEN.
5.4. Check the circuit breaker is in INVDPOS if auxiliary contacts read same
value or CB is open and inject the current in selected phase more than
AccStopCurr set value.
6. Test of remaining life of CB
6.1. Test the set timing defined byRatedOperCurr, RatedFltCurr,
OperNoRated, OperNoFault, DirCoef, CBLifeAlmLevel.
6.2. Vary the phase current in the selected phase from below rated operated
current, RatedOperCurr to above rated fault current, RatedFltCurr of a
breaker.
6.3. The remaining life of CB output CBLIFEPH is estimated when the CB is
changed from closed to open position. Check that the output CBLIFEPH
is decreased with a value that corresponds to the injected current.
6.4. CBLIFEAL is activated as soon as CBLIFEPH is below the set
CBLifeAlmLevel value.
7. Test of accumulated energy
GUID-962A344D-5F8D-49A6-B3AC-29C7FEED0A3D v4
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