Completing The Test; Breaker Failure Protection, Single Phase Version Ccsrbrf - ABB REB670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.4.6.8
10.4.7
100
Checking the case with fault current below set value
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 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".

Completing the test

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.

Breaker failure protection, single phase version CCSRBRF

Prepare the IED for verification of settings as outlined in section
and section "Preparing for test"
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
in this chapter.
1MRK 505 372-UEN A
I>BlkCont
M12104-281 v10
M12104-72 v5
SEMOD128582-3 v4
"Requirements"
Busbar protection REB670 2.2 IEC
Commissioning manual