12.12.3.1
Verifying the settings
GUID-962A344D-5F8D-49A6-B3AC-29C7FEED0A3D v4
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
0
1
0
POSOPEN
0
0
1
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 by
RatedOperCurr, 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
1MRK 502 067-UEN B
Section 12
Testing functionality by secondary injection
225
Commissioning manual
