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1MRK 506 377-UEN Rev. L
10.5.7.7
Verifying the case FunctionMode = Contact
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
To be made only whenFunctionMode = Current/Contact is selected.
Checking the case with fault current above set value IP>
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
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
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
Prepare the IED for verification of settings outlined in Section
Railway application RER670
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
GUID-EB5AEFC4-6F51-4E1E-8055-4FEC53CA81FD v3
"Preparing the IED to verify
Section 10
M12104-213 v10
M12104-237 v7
M12104-241 v8
M12104-281 v11
M12104-72 v5
settings".
111
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