Breaker Failure Protection Ccrbrf; Checking The Phase Current Operate Value, Ip; Checking The Residual (Earth Fault) Current Operate Value In> Set Below Ip; Checking The Re-Trip And Back-Up Times - ABB Relion 650 Series Commissioning Manual

Section 7
Testing functionality
7.4.4

Breaker failure protection CCRBRF

Prepare the IED for verification of settings as outlined in
settings".
Values of the logical signals for CCRBRF are available on the local HMI under Main menu/
Tests/Function status/Current/CCRBRF(50BF)/1:CCRBRF. The Signal Monitoring in PCM600
shows the same signals that are available on the local HMI.
The Breaker failure protection 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
phase-to-earth faults.
At mode
where the return current is connected to the summated current input. The value of residual
(earth fault) current IN set lower than
7.4.4.1 Checking the phase current operate value,
Check the current level
out of 3 or 2 out of 4 as set under Main menu/Settings/IED Settings/Current/
CCRBRF(50BF)/1:CCRBRF.
1. Apply the fault condition, including START of CCRBRF, with a current below set
2. Repeat the fault condition and increase the current in steps until a trip occurs.
3. Compare the result with the set
4. Disconnect AC and START input signals.
7.4.4.2 Checking the residual (earth fault) current operate value
IP>
Check the low set
1 out of 4 as set under Main menu/Settings/IED Settings/Current/CCRBRF(50BF)/
=
1:CCRBRF.
1. Apply the fault condition, including START of CCRBRF, with a current just below set
IN>Pickup_N .
2. Repeat the fault condition and increase the current in steps until trip appears.
3. Compare the result with the set
4. Disconnect AC and START input signals.
7.4.4.3

Checking the re-trip and back-up times

The check of the set times can be made in connection with the check of operate values above.
Choose the applicable function and trip mode, such as
RetripMode = No CBPos. Check as set under Main menu/Settings/IED Settings/Current/
CCRBRF(50BF)/1:CCRBRF.
42
2 out of 4 the phase current setting, IP> can be checked by single-phase injection
IP> where setting FunctionMode = Current and setting BuTripMode = 1
NoI>check or Retrip off is set, only back-up trip can be used to
Note! If
IP> .
check set
IN> current where setting FunctionMode = Current and setting BuTripMode
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6.1"Preparing the IED to verify
IP> is easiest checked in back-up trip mode 1 out of 4 .
IP>
IP> .
IN> .
FunctionMode = Current and setting
1MRK 505 264-UEN A
1 out of 3 , it is sufficient to test
IP> .
IN> set below
Busbar protection REB650
Commissioning manual
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