1. Apply the fault condition, including initiation of CSPRBRF (50BF), well above the
set current value. Measure time from initiation of CSPRBRF (50BF).
2. Check the re-trip t1 and back-up trip times t2.
3. Disconnect AC and initiate input signals.
6.3.10.4 Verifying the
RetripMode
1. Choose the mode below, which corresponds to the actual case. In the cases below it
is assumed that FunctionMode = Current as set under Main menu/Settings/IED
Settings/Current/CSPRBRF(50BF)/CSPRBRF:1
2. Continue with the cases shown below.
Checking the re-trip with current check,
RetripMode
=
CB Pos Check
1. Set RetripMode = CB Pos Check check.
2. Apply the fault condition, including initiation of CSPRBRF (50BF), well above the
set current value.
3. Verify that retrip is achieved after set time t1 and back-up trip after time t2
4. Apply the fault condition, including initiation of CSPRBRF (50BF), with current
below set current value.
5. Verify that no re-trip, and no back-up trip is obtained.
6. Disconnect AC and initiate input signals.
Checking the case without re-trip,
RetripMode
=
Retrip Off
1. Set RetripMode = Retrip Off.
2. Apply the fault condition, including initiation of CSPRBRF (50BF), well above the
set current value.
3. Verify that no re-trip, but back-up trip is achieved after set time.
4. Disconnect AC and initiate input signals.
Checking re-trip without current check,
RetripMode
=
No CBPos Check
1. Set RetripMode = No CBPos Check.
2. Apply the fault condition, including initiation of CSPRBRF (50BF), 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 initiation of CSPRBRF (50BF), with current
below set current value.
5. Verify that re-trip is achieved after set time t1, but no back-up trip is obtained.
6. Disconnect AC and initiate input signals.
Section 6 1MRK 505 293-UUS A
Testing functionality
66
Commissioning manual
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