ABB RELION 670 Series Commissioning Manual page 92

Section 10
Testing functionality by secondary injection
1. Repeat the check of back-up trip time. Disconnect current and START input signals.
2. Activate the input CBFLT. The output CBALARM (CB faulty alarm) should appear after set
time
3. Apply the fault condition, including START of CCSRBRF, with current above set current
value.
4. Verify that back-up trip is obtained without intentional delay, for example, within 20ms
from application of START.
5. Disconnect injected AC and input signals.
10.3.7.6 Verifying the case
It is assumed that re-trip without current check is selected,
Procedure
1. Set
2. Apply input signal for CB closed to relevant input or inputs CBCLD
3. Apply input signal, or signals for START of CCSRBRF. The value of current could be low.
4. Verify that re-trip and back-up trip are achieved after set times.
5. Disconnect the START signal(s). Keep the CB closed signal(s).
6. Apply input signal(s), for START of CCSRBRF. The value of current could be low.
7. Arrange disconnection of CB closed signal(s) well before set back-up trip time
8. Verify that back-up trip is not achieved.
9. Disconnect injected AC and START input signals.
10.3.7.7 Verifying the function mode
To be made only when
the tests in one phase only, or at three-phase trip applications for just three-phase tripping.
Checking the case with fault current above set value
The operation shall be as in
Set
RetripMode = CB Pos Check .
Procedure
1. Set
2. Leave the input for CB close inactivated. This signal should not influence. Leave the
inputs for CB close inactivated. These signals should not influence.
3. Apply the fault condition, including START of CCSRBRF, with current above the set
value.
4. Check that the re-trip, if selected, and back-up trip commands are achieved.
5. Disconnect injected AC and START input signals.
Checking the case with fault current below set value
The case shall simulate a case where the fault current is very low and operation will depend on
CB position signal from CB auxiliary contact. It is suggested that re-trip without current check
is used; setting
Procedure
86
tCBAlarm . Keep the input activated.
FunctionMode = Contact
FunctionMode = Contact .
FunctionMode = Current&Contact is selected. It is suggested to make
FunctionMode = Current .
FunctionMode = Current/Contact .
RetripMode = No CBPos Check .
RetripMode = No CBPos Check .
Curr&Cont Check
1MRK 505 339-UEN B
SEMOD128582-183 v4
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SEMOD128582-207 v3
SEMOD128582-211 v6
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SEMOD128582-227 v6
Commissioning manual