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1MRK 506 355-UEN A
10.13.3
10.13.3.1
Line distance protection REL670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
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
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 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
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Section 10
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