Table of Contents
Advertisement
1MRK 506 377-UEN Rev. L
10.5.6.2
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
10.5.7
Breaker failure protection CCRWRBRF
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
Function revision history
10.5.7.2
Checking the phase current operate value, IP>
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. Note that the
START signal shall be re-applied for each new current value.
3.
Compare the result with the set IP>.
10.5.7.3
Checking the re-trip and back-up times
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 =
UseFunctionMode.
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.
10.5.7.4
Verifying the re-trip mode
Choose the mode below, which corresponds to the actual case.
In the cases below it is assumed that FunctionMode = Current is selected.
Checking the case without re-trip
Railway application RER670
Commissioning manual
If No CBPos Check or Retrip off is set, only back-up trip can be used to check set
IP>.
© 2017 - 2022 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
"Preparing the IED to verify
GUID-3A043295-3AE3-437E-BBE9-D7FD6F349892 v2
Section 10
M14950-48 v5
M12104-2 v13
settings".
M12104-23 v14
M12104-93 v12
M12104-36 v6
M12104-107 v8
109
Advertisement
Table of Contents
