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Section 10
Testing functionality by secondary injection
Procedure
1.
Apply the fault condition, including START of CCSRBRF, well above the set current value.
2.
Measure time from Start of CCSRBRF.
3.
Check the re-trip t1 and back-up trip times t2 and t3.
4.
Disconnect AC and start input signals.
10.4.7.4
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, RetripMode = Off
Procedure
1.
Set RetripMode = Off.
2.
Apply the fault condition, including START of CCSRBRF, well above the set current value.
3.
Verify that no re-trip, but back-up trip is achieved after the set time.
4.
Disconnect AC and start input signals.
Checking the re-trip with current check, RetripMode = UseFunctionMode
Procedure
1.
Set RetripMode = UseFunctionMode.
2.
Apply the fault condition, including start of CCSRBRF, well above the set current value.
3.
Verify that re-trip is achieved after set time t1 and back-up trip after time t2.
4.
Apply the fault condition, including the START of CCSRRBRF, with the current below the set
current value.
5.
Verify that no re-trip, and no back-up trip is obtained.
6.
Disconnect AC and START input signals.
Checking re-trip without current check, RetripMode = Always
Procedure
1.
Set RetripMode = Always.
2.
Apply the fault condition, including start of CCSRBRF, well above the set current value.
3.
Verify that re-trip is achieved after set time t1 and back-up trip after time t2.
4.
Apply the fault condition, including the START of CCSRBRF, with the current below the set
current value.
5.
Verify that re-trip is achieved after a set time t1, and no back-up trip is obtained.
6.
Disconnect AC and START input signals.
10.4.7.5
Verifying the back-up trip mode
In the cases, it is assumed that FunctionMode = Current is selected.
Checking that back-up tripping is not achieved at normal CB tripping
Use the actual tripping modes. The case below applies to re-trip with current check.
Procedure
90
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1MRK 505 372-UEN Rev. K
SEMOD128582-67 v2
SEMOD128582-71 v6
GUID-0306BE95-7B42-41F9-A62E-C05D5EB97F73 v1
GUID-C6103B63-BCC4-499E-9364-9A32BC48EC78 v1
SEMOD128582-115 v3
SEMOD128582-119 v4
Busbar protection REB670
Commissioning manual
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