10.5.6.2
Completing the test
M14950-48 v5
continue to test another function or end the test by changing the
TESTMODE
setting to
Off
. Restore connections and settings to their original values, if they were
changed for testing purposes.
10.5.7
Breaker failure protection CCRWRBRF
M12104-2 v12
Prepare the IED for verification of settings outlined in Section
.
Values of the logical signals for CCRWRBRF are available on the local HMI under
Main menu/Tests/Function status/Current protection/BreakerFailure(50BF,
2I>BF)/CCRWRBRF(50BF;2I>BF):x
, where x = 1, 2.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
The breaker failure protection function CCRWRBRF should normally be tested in
conjunction with some other function that provides a start signal. An external
START signal can also be used.
10.5.7.1
Checking the phase current operate value,
IP>
M12104-23 v13
The check of the
IP>
current level is made in
FunctionMode
=
Current
.
1.
Apply the fault condition, including START of CCRWRBRF, with a current
below the set
IP>
.
2.
Repeat the fault condition and increase the current in steps until a trip occurs.
3.
Compare the result with the set
IP>
.
If
No CBPos Check
or
Retrip off
is set, only back-up trip can be
used to check set
IP>
.
10.5.7.2
Checking the re-trip and back-up times
M12104-93 v11
The check of the set times can be made in connection with the check of operate
values above.
Choose the applicable function and trip mode, such as
FunctionMode
=
Current
and
RetripMode
=
CB Pos Check
.
1.
Apply the fault condition, including the START of CCRWRBRF, well above
the set current value. Measure the time from START of CCRWRBRF.
2.
Check the re-trip
t1
and back-up trip time
t2
.
1MRK 506 377-UEN C
Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC
115
Commissioning manual
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