10.13.3
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
10.13.3.1
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
1MRK 506 355-UEN A
Section 10
Testing functionality by secondary injection
Line distance protection REL670 2.1 IEC
235
Commissioning manual
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