ABB RED670 Commissioning Manual page 269

1MRK 505 378-UEN A
Line differential protection RED670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection
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
7.1. Test the actual set values defined by AccSelCal to Aux Contact,
ContTrCorr and AlmAccCurrPwr.
7.2. Inject phase current in the selected phase such that its value is greater
than set AccStopCurr value.
7.3. When the breaker goes to open position, accumulated energy IPOWPH is
calculated. The calculated value can be seen on the output IPOWPH.
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 LOAccCurrPwr.
7.6. Calculation of accumulated energy IPOWPH is stopped when injected
current is lower than set AccStopCurr value.
8. Test of CB operation cycles
Section 11
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