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1MRK 502 035-UEN A
1.
Set
2.
Apply input signal for CB closed to input CBCLDL1 (2 or 3)CBCLD
3.
Apply input signal, for start of CCRBRF. The value of current could be low.
4.
Verify that phase-selection re-trip and back-up trip are achieved after set times.
5.
Disconnect the start signal. Keep the CB closed signal.
6.
Apply input signal, for start of CCRBRF. The value of current could be low.
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 START input signals.
7.5.5.7
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 start of CCRBRF, with current above the set
4.
Check that the re-trip, if selected, and back-up trip commands are achieved.
5.
Disconnect injected AC and START 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, setting
1.
Set
2.
Apply input signal for CB closed to relevant input or inputs CBCLDL1 (2 or 3)
3.
Apply the fault condition with input signal(s) for start of CCRBRF. 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 START signal(s). 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 BC closed signal(s) well before set back-up trip time
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".
9.
Disconnect injected AC and START input signals.
7.5.5.8
Completing the test
Continue to test another function or end the testing by setting the parameter
under Main menu/Tests/IED test mode/1:TESTMODE. If another function is tested, then set
the parameter
CCRBRF(50BF)/X:CCRBRF for the function, or for each individual function in a chain, to be
tested next. Remember to set the parameter
has been tested.
Generator protection REG650
Commissioning manual
FunctionMode = Contact
FunctionMode = Current&Contact is selected.
FunctionMode = Current .
FunctionMode = Current&Contact .
RetripMode = No CBPos Check .
FunctionMode = Current&Contact .
Blocked to No under Main menu/Tests/Function test modes/Current/
© Copyright 2011 ABB. All rights reserved
Current&Contact
IP>
I>BlkCont
I>BlkCont
Blocked to Yes , for each individual function that
Section 7
Testing functionality
t2 .
M12104-237 v4
M12104-241 v4
IP> value.
M12104-281 v6
t2 . It
M12104-72 v5
TestMode to Off
59
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