ABB Relion 670 Series Commissioning Manual page 176

Section 11
Testing functionality by secondary injection
Choose the applicable function and trip mode, such as
UseFunctionMode .
1. Apply the fault condition, including initiation of CCRBRF (50BF), well above the set current
value. Measure time from BFI_3P of CCRBRF (50BF).
2. Check the re-trip
In applicable cases, the back-up trip for multi-phase pickup
t3 can also be checked. To check t2MPh , a two-phase or three-phase initiation shall be
applied.
3. Disconnect AC and BFI_3P input signals.
11.5.8.4 Verifying the re-trip mode
Choose the mode below, which corresponds to the actual case.
In the cases below it is assumed that
Checking the case without re-trip,
1. Set
2. Apply the fault condition, including initiation of CCRBRF (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 BFI_3P input signals.
Checking the re-trip with current check,
1. Set
2. Apply the fault condition, including initiation of CCRBRF (50BF), well above the set current
value.
3. Verify that re-trip is achieved after set time
4. Apply the fault condition, including initiation of CCRBRF (50BF), with current below set
current value.
5. Verify that no re-trip, and no back-up trip is obtained.
6. Disconnect AC and BFI_3P input signals.
Checking re-trip without current check
1. Set
2. Apply the fault condition, including initiation of CCRBRF (50BF), well above the set current
value.
3. Verify that re-trip is achieved after the set time
4. Apply the fault condition, including initiation of CCRBRF (50BF), with current below set
current value.
5. Verify that re-trip is achieved after set time
6. Disconnect AC and BFI_3P input signals.
11.5.8.5 Verifying the back-up trip mode
In the cases below it is assumed that
170
t1 and back-up trip times t2 and t3 .
RetripMode = Off .
RetripMode = UseFunctionMode .
RetripMode = Always .
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FunctionMode = Current and RetripMode =
FunctionMode = Current is selected.
RetripMode = Off
RetripMode = UseFunctionMode
t1 and back-up trip after time t2 .
t1 , and the back-up trip after time t2 .
t1 , but no back-up trip is obtained.
FunctionMode = Current is selected.
1MRK 506 371-UUS E
t2MPh and back-up trip 2, t2 and
Line distance protection REL670
Commissioning manual
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