ABB RET650 2.1 IEC Commissioning Manual page 101

1MRK 504 160-UEN -
Transformer protection RET650 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
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
8.1. Test the actual set values defined by OperAlmLevel and OperLOLevel.
8.2. The operation counter, NOOPER is updated for every close-open sequence
of the breaker by changing the position of auxiliary contacts POSCLOSE
and POSOPEN.
8.3. OPERALM is activated when NOOPER value exceeds the set
OperAlmLevel value. The actual value can be read on the output NOOPER.
8.4. OPERLO is activated when NOOPER value exceeds the set OperLOLevel
value.
9. Test of CB spring charge monitoring
Section 10
95