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Section 10
Testing functionality by secondary injection
10.10.3.1
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
4.2. Change the status of the auxiliary contacts such that travel time to open TTRVOP and
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
5.4. Check the circuit breaker is in INVDPOS if auxiliary contacts read same value or CB is
6.
Test of remaining life of CB
6.1. Test the set timing defined byRatedOperCurr, RatedFltCurr, OperNoRated, OperNoFault,
6.2. Vary the phase current in the selected phase from below rated operated current,
6.3. The remaining life of CB output CBLIFEPH is estimated when the CB is changed from
6.4. CBLIFEAL is activated as soon as CBLIFEPH is below the set CBLifeAlmLevel value.
7.
Test of accumulated energy
7.1. Test the actual set values defined by AccSelCal to Aux Contact, ContTrCorr and
7.2. Inject phase current in the selected phase such that its value is greater than set
7.3. When the breaker goes to open position, accumulated energy IPOWPH is calculated. The
7.4. Alarm signal IPOWALPH appears when IPOWPH is greater than set AlmAccCurrPwr value.
7.5. Lockout signal IPOWLOPH appears if IPOWPH exceeds further to the threshold value
7.6. Calculation of accumulated energy IPOWPH is stopped when injected current is lower than
8.
Test of CB operation cycles
134
tTrCloseAlm.
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.
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.
open and inject the current in selected phase more than AccStopCurr set value.
DirCoef, CBLifeAlmLevel.
RatedOperCurr to above rated fault current, RatedFltCurr of a breaker.
closed to open position. Check that the output CBLIFEPH is decreased with a value that
corresponds to the injected current.
AlmAccCurrPwr.
AccStopCurr value.
calculated value can be seen on the output IPOWPH.
LOAccCurrPwr.
set AccStopCurr value.
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Busbar protection REB670
1MRK 505 372-UEN Rev. K
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Commissioning manual
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