ABB REQ650 Commissioning Manual

1. Set BuTripMode = 2 out of 4.
2. Apply the fault condition, including initiation of CCRBRF (50BF), with one-phase
current above set Pickup_PH and residual (ground fault) above set Pickup_N.
3. Verify that back-up trip is achieved after set time. If selected, re-trip should also
appear.
4. Apply the fault condition, including initiation of CCRBRF (50BF), with at least one-
phase current below set Pickup_PH and residual (ground fault) above set Pickup_N.
The current may be arranged by feeding three- (or two-) phase currents with equal
phase angle (I0-component) below Pickup_PH, but of such value that the residual
(ground fault) current (3I
0
) will be above set value Pickup_N.
5. Verify that back-up trip is not achieved.
6. Disconnect AC and INITIATE input signals.
6.3.9.6 Verifying the case
RetripMode = Contact
It is assumed that re-trip without current check is selected, RetripMode = Contact.
1. Set FunctionMode = Contact
2. Apply input signal for CB closed to input 52a_A (B or C).
3. Apply input signal, for initiation of CCRBRF (50BF).
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 t2.
8. Verify that back-up trip is not achieved.
9. Disconnect injected AC and INITIATE input signals.
6.3.9.7 Verifying the function mode
Current&Contact
To be made only when FunctionMode = Current&Contact is selected.
Checking the case with fault current above set value
Pickup_PH
The operation shall be as in FunctionMode = Current.
1. Set FunctionMode = Current&Contact.
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.
1MRK 505 293-UUS A Section 6
Testing functionality
63
Commissioning manual

ABB REQ650 Specifications

General

Brand	ABB
Model	REQ650
Category	Protection Device
Language	English