11.13.3 Breaker monitoring SSCBR
Prepare the IED for verification of settings outlined in section “Testing the IED
operation”.
The Signal Monitoring tool in PCM600 shows the service values that are available on the
Local HMI as well.
Values of the logical signals belong to the breaker monitoring are available on the local
HMI under: Main menu/Test/Function status/Monitoring/BreakerMonitoring/
SSCBR:x
11.13.3.1 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 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
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
276 Transformer protection RET670 2.2 ANSI
Commissioning manual
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