1.
Set
FunctionMode = Current&Contact.
2.
Apply input signal for CB closed to the 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
I>BlkCont.
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 input signal 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
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”.
12.5.9.9
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 their original values, if they were changed for testing
purposes.
12.5.10
Breaker failure protection, single phase version CCSRBRF
SEMOD128582-3 v4
Prepare the IED for verification of settings as outlined in section
and
in this chapter.
The breaker failure protection, single phase version function CCSRBRF should normally be
tested in conjunction with some other function that provides a START signal. An external
START signal can also be used.
CCSRBRF has to be set and configured before the testing can start. CCSRBRF is highly flexible
in that it permits a choice of functional and tripping modes. The various modes are checked at
the factory as part of the design verification. In certain cases only modes with a high
probability of coming into operation need to be checked, in order to verify the configuration
and settings.
Testing requirements
•
Calculated settings
•
Valid configuration diagram for the IED
•
Valid terminal diagram for the IED
•
Technical reference manual
•
Single phase test equipment
The technical reference manual contains application and functionality summaries, function
blocks, logic diagrams, input and output signals, a list of setting parameters and technical
data for the function.
The test equipment should be able to provide a single phase supply of currents. The
magnitude of currents should be possible to vary.
Make sure the IED is prepared for test before starting the test session. Consider the logic
diagram of the function when performing the test. The response from a test can be viewed in
different ways:
•
Binary output signals
•
Service values in the local HMI (logical signal or phasors)
•
A PC with PCM600 (configuration software) in debug mode
Section 12
1MRK 502 067-UEN B
Testing functionality by secondary injection
168
Commissioning manual
