Verifying Instantaneous Back-Up Trip At Cb Faulty Condition; Verifying The Case Functionmode = Cb Pos; Verifying The Case Retripmode = Contact - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UEN E
The normal mode
applicable cases the modes
which corresponds to the actual case.
Checking the case
It is assumed that the earth-fault current setting
1. Set
2. Apply the fault condition, including start of CCRBRF, with one-phase current below set
IP> but above IN> . The residual earth-fault should then be above set IN> .
3. Verify that back-up trip is achieved after set time. If selected, re-trip should also appear.
4. Disconnect AC and START input signals.
Checking the case
The earth-fault current setting
1. Set
2. Apply the fault condition, including start of CCRBRF, with one-phase current above set
IP> and residual (earth fault) above set IN> .
3. Verify that back-up trip is achieved after set time. If selected, re-trip should also appear.
4. Apply the fault condition, including start of CCRBRF, with at least one-phase current
below set
feeding three- (or two-) phase currents with equal phase angle (I0-component) below
but of such value that the residual (earth fault) current (3I
5. Verify that back-up trip is not achieved.
6. Disconnect AC and START input signals.
11.4.9.6

Verifying instantaneous back-up trip at CB faulty condition

Applies in a case where a signal from CB supervision function regarding CB being faulty and
unable to trip is connected to input CBFLT.
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 CCRBRF, 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.
11.4.9.7 Verifying the case
It is assumed that re-trip without current check is selected,
1. Set
2. Apply input signal for CB closed to relevant input or inputs CBCLDL1, CBCLD2 or CBCDL3.
3. Apply the input signal, or signals for the start of CCRBRF.
4. Verify that phase selection re-trip and backup 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 CCRBRF.
7. Arrange disconnection of CB closed signal(s) well before set backup trip time
8. Verify that backup trip is not achieved.
11.4.9.8 Verifying the case
It is assumed that re-trip without current check is selected,
Bay control REC670
Commissioning manual
BuTripMode = 1 out of 3 should have been verified in the tests above. In
1 out of 4 and 2 out of 4 can be checked. Choose the mode below,
BuTripMode = 1 out of 4
BuTripMode = 1 out of 4 .
BuTripMode = 2 out of 4
IN> may be equal to or below phase-current setting IP> .
BuTripMode = 2 out of 4 .
IP> and residual (earth fault) above set IN> . The current may be arranged by
tCBAlarm . Keep the input activated.
FunctionMode = CB Pos
FunctionMode = CB Pos .
RetripMode = Contact
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Testing functionality by secondary injection
IN> is below phase current setting IP> .
) will be above set value
0
RetripMode = UseFunctionMode .
RetripMode = Contact .
Section 11
M12104-165 v6
M12104-179 v7
IP> ,
IN> .
M12104-197 v7
GUID-06D1545D-31F7-4B48-821E-151212962A81 v1
t2
M12104-213 v10
107