ABB RED670 Relion 670 series, Commissioning Manual

Page: 189 / 308

11.5.6.2 Completing the test
SEMOD175060-148 v4
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.
11.5.7 Breaker failure protection, phase segregated activation and
output CCRBRF
M12104-2 v12
Prepare the IED for verification of settings outlined in Section "Preparing the IED
to verify settings" .
The Breaker failure protection, 3-phase activation and output function CCRBRF
should normally be tested in conjunction with some other function that provides a
start signal. An external START signal can also be used.
To verify the settings in the most common back-up trip mode 1 out of 3 , it is
sufficient to test phase-to-earth faults.
At mode 2 out of 4 the phase current setting, IP> can be checked by single-phase
injection where the return current is connected to the summated current input. The
value of residual (earth fault) current IN set lower than
IP> is easiest checked in
back-up trip mode 1 out of 4 .
11.5.7.1 Checking the phase current operate value,
IP>
M12104-23 v13
The check of the IP> current level is best made in FunctionMode = Current and
BuTripMode = 1 out of 3 or 2 out of 4 .
1. Apply the fault condition, including START of CCRBRF, with a current
below the set
IP> .
2. Repeat the fault condition and increase the current in steps until a trip occurs.
3. Compare the result with the set IP> .
If No CBPos Check or Retrip off is set, only back-up trip can be
used to check set IP> .
11.5.7.2 Checking the residual (earth fault) current operate value
IN> set
below
IP>
M12104-80 v9
Check the low set IN> current where setting FunctionMode = Current and setting
BuTripMode = 1 out of 4
1MRK 505 378-UEN A
Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 183
Commissioning manual