10.5.6.2 Completing the test
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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
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Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
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>
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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
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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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