ABB Relion 670 Series Commissioning Manual page 96
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Technical reference manual (1232 pages) ,
- Applications manual (944 pages)
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Section 10
Testing functionality by secondary injection
10.4.7.3
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 FunctMode = Current and RetripMode =
UseFunctionMode.
Procedure
1.
Apply the fault condition, including BFI of CCSRBRF (50BF), well above the set current value.
2.
Measure time from Start of CCSRBRF (50BF).
3.
Check the re-trip t1 and back-up trip times t2 and t3.
4.
Disconnect AC and initiate 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 BFI of CCSRBRF (50BF), 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 initiate input signals.
Checking the re-trip with current check, RetripMode = UseFunctionMode
Procedure
1.
Set RetripMode = UseFunctionMode.
2.
3.
Apply the fault condition, including initiation of CCSRBRF (50BF), well above the set current value.
4.
Verify that re-trip is achieved after set time t1 and back-up trip after time t2.
5.
6.
Apply the fault condition, including initiation of CCSRBRF (50BF), with current below set current
value.
7.
Verify that no re-trip, and no back-up trip is obtained.
8.
Disconnect AC and BFI_3P input signals.
Checking re-trip without current check, RetripMode = Always
Procedure
1.
Set RetripMode = Always.
2.
3.
Apply the fault condition, including initiation of CCSRBRF (50BF), well above the set current value.
4.
Verify that re-trip is achieved after set time t1 and back-up trip after time t2.
5.
6.
Apply the fault condition, including initiation of CCSRBRF (50BF), with current below set current
value.
7.
Verify that re-trip is achieved after a set time t1, and no back-up trip is obtained.
8.
Disconnect AC and BFI_3P input signals.
90
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Busbar protection REB670
Commissioning manual
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