10.5.7.7
Verifying the case FunctionMode = Contact
M12104-213 v10
It is assumed that re-trip without current check is selected,
FunctionMode
=
Contact
.
1.
Set
FunctionMode
=
Contact
2.
Apply the input signal for CB closed to the relevant input or inputs CBCLDL1 or CBCLD2.
3.
Apply the input signal START of CCRWRBRF.
4.
Verify that the re-trip and back-up trip are achieved after set times.
5.
Disconnect the start signal. Keep the CB closed signal(s).
6.
Apply the input signal START of CCRWRBRF.
7.
Arrange disconnection of CB closed signal(s) well before set back-up trip time
t2
.
8.
Verify that back-up trip is not achieved.
10.5.7.8
Verifying the function mode Current/Contact
M12104-237 v7
To be made only when
FunctionMode
=
Current/Contact
is selected.
Checking the case with fault current above set value IP>
M12104-241 v8
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 the START of CCRWRBRF, with the current above the set
IP>
value.
4.
Check that the re-trip, if selected, and back-up trip commands are achieved.
Checking the case with fault current below set value I>BlkCont
M12104-281 v11
It simulates 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, setting
RetripMode
=
No CBPos
Check.
1.
Set
FunctionMode
=
Current/Contact
.
2.
Apply the input signal for CB closed to the relevant input or inputs CBCLDL1 or CBCLDL2.
3.
Apply the fault condition with input signal START of CCRWRBRF. The value of current should
be below the set value
I>BlkCont
.
4.
Verify that the 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 input signal START. Keep the CB closed signal(s).
6.
Apply the fault and the start again. The value of current should be below the set value
I>BlkCont
.
7.
Arrange disconnection of CB closed signal(s) well before set back-up trip time
t2
. It simulates 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”.
10.5.7.9
Completing the test
M12104-72 v5
Continue to test another function or end the test by changing the
TESTMODE
setting to
Off
. Restore
connections and settings to the original values, if changed for testing purposes.
10.5.8
Overcurrent protection with binary release BRPTOC
GUID-EB5AEFC4-6F51-4E1E-8055-4FEC53CA81FD v3
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings"
1MRK 506 377-UEN Rev. K
Section 10
Testing functionality by secondary injection
Railway application RER670
111
Commissioning manual
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