ABB Relion 670 Series Commissioning Manual page 97

1MRK 505 372-UUS Rev. K
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
1. Apply the fault condition, including BFI of CCSRBRF (50BF), with phase current well above set
value Pickup_PH.
2. Arrange switching the current off, with a margin before back-up trip time, t2. It may be made at
issue of re-trip command.
3. Check that re-trip is achieved, if selected, but no back-up trip.
4. Disconnect AC and initiate input signals.
10.4.7.6 Verifying instantaneous back-up trip at CB faulty condition
Applies in a case where a signal from CB supervision function regarding CB being faulty and unable to
trip is connected to input 52FAIL.
Procedure
1. Repeat the check of back-up trip time. Disconnect current and BFI_3P input signals.
2. Activate the input 52FAIL. The output CBALARM (CB faulty alarm) should appear after set time
tCBAlarm. Keep the input activated.
3. Apply the fault condition, including BFI_3P of CCSRBRF (50BF), with current above set current
value.
4. Verify that back-up trip is obtained without intentional delay, for example, within 20ms from
application of BFI_3P.
5. Disconnect injected AC and input signals.
10.4.7.7 Verifying the case FunctionMode = CB Pos
It is assumed that re-trip without current check is selected, RetripMode = UseFunctionMode.
1. Set FunctionMode = CB Pos
2. Apply input signal for CB closed to relevant input 52a.
3. Apply the BFI_3P input signal for the start of CCSRBRF (50BF). The value of current can be low.
4. Verify that phase selection re-trip and backup trip are achieved after set times.
5. Disconnect the BFI_3P signal. Keep the CB closed signal.
6. Apply BFI_3P input signal, for start of CCSRBRF (50BF). The value of current can be low.
7. Arrange disconnection of CB closed signal before set backup trip time t2.
8. Verify that backup trip is not achieved.
9. Disconnect injected AC and BFI_3P signal.
10.4.7.8 Verifying the case FunctionMode = Current or CB Pos
To be made only whenFunctionMode = Current or CB Pos is selected. It is suggested to make the tests
in one phase only, or at three-pole trip applications for just three-pole tripping.
Busbar protection REB670
Commissioning manual
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Section 10
Testing functionality by secondary injection
SEMOD128582-115 v3
SEMOD128582-119 v4
SEMOD128582-167 v5
GUID-B7B9D78C-B660-4E1D-A27E-EF45B542C5E2 v1
GUID-E9854053-8E90-430A-B788-993E1706CE33 v1
91