Verifying The Function Mode Current&Contact; Completing The Test - ABB RET650 Series Commissioning Manual

1MRK 504 136-UUS B
4. Verify that phase selection re-trip and back-up trip are achieved after set times.
5. Disconnect the trip signal. Keep the CB closed signal.
6. Apply input signal, for initiation of CCRBRF (50BF).
7. Arrange disconnection of CB closed signal well before set back-up trip time
8. Verify that back-up trip is not achieved.
9. Disconnect injected AC and INITIATE input signals.
7.4.6.7 Verifying the function mode
To be made only when
Checking the case with fault current above set value
The operation shall be as in
1. Set
2. Leave the inputs for CB close inactivated. These signals should not influence.
3. Apply the fault condition, including initiation of CCRBRF (50BF), with current above the set
Pickup_PH value.
4. Check that the re-trip, if selected, and back-up trip commands are achieved.
5. Disconnect injected AC and INITIATE 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,
RetripMode = No CBPos Check .
setting
1. Set
2. Apply input signal for CB closed to relevant input or inputs 52a_A (B or C)
3. Apply the fault condition with input signal(s) for initiation of CCRBRF (50BF). The value of
current should be below the set value
4. Verify that phase selection re-trip (if selected) and back-up trip are achieved after set times.
Failure to trip is simulated by keeping the signal(s) CB closed activated.
5. Disconnect the AC and the INITIATE signal(s). Keep the CB closed signal(s).
6. Apply the fault and the initiation again. The value of current should be below the set value
Pickup_BlkCont .
7. Arrange disconnection of BC closed signal(s) well before set back-up trip time
a correct CB tripping.
8. Verify that back-up trip is not achieved. Re-trip can appear for example, due to selection "Re-
trip without current check".
9. Disconnect injected AC and INITIATE input signals.
7.4.6.8

Completing the test

Continue to test another function or end the testing by setting the parameter
Disabled under Main menu/Tests/IED test mode/TESTMODE:1. If another function is tested, then
set the parameter
CCRBRF(50BF)/CCRBRF:X for the function, or for each individual function in a chain, to be tested
next. Remember to set the parameter
tested.
Transformer protection RET650
Commissioning manual
FunctionMode = Current&Contact is selected.
FunctionMode = Current .
FunctionMode = Current&Contact .
FunctionMode = Current&Contact .
Blocked to No under Main menu/Tests/Function test modes/Current/
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Current&Contact
Pickup_PH
Pickup_BlkCont
Pickup_BlkCont
Blocked to Yes , for each individual function that has been
Section 7
Testing functionality
t2 .
M12104-237 v4
M12104-241 v4
M12104-281 v7
t2 . It simulates
M12104-72 v5
TestMode to
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