ABB Relion 670 Series Commissioning Manual page 175

1MRK 506 371-UUS E
11.5.8 Breaker failure protection, phase segregated activation and
output CCRBRF (50BF)
Prepare the IED for verification of settings outlined in Section
settings".
The Breaker failure protection, 3-phase activation and output function CCRBRF (50BF) should
normally be tested in conjunction with some other function that provides an initiate signal. An
external BFI_3P signal can also be used.
To verify the settings in the most common back-up trip mode
phase-to-ground faults.
At mode
where the return current is connected to the summated current input. The value of residual
(ground fault) current IN set lower than
4 .
11.5.8.1 Checking the phase current trip value,
The check of the
= 1 out of 3 or 2 out of 4 .
1. Apply the fault condition, including BFI_3P of CCRBRF (50BF), with a current below set
Pickup_PH .
2. Repeat the fault condition and increase the current in steps until a trip occurs. Note that the
INITIATE signal shall be re-applied for each new current value.
3. Compare the result with the set
11.5.8.2 Checking the residual (ground fault) current trip value
Pickup_PH
Check the low set
BuTripMode = 1 out of 4
1. Apply the fault condition, including BFI_3P of CCRBRF (50BF), with a current just below set
Pickup_N .
2. Repeat the fault condition and increase the current in steps until trip appears. Note that the
INITIATE signal shall be re-applied for each new current value.
3. Compare the result with the set
4. Disconnect AC and BFI_3P input signals.
11.5.8.3 Checking the re-trip and back-up times
The check of the set times can be made in connection with the check of trip values above.
Line distance protection REL670
Commissioning manual
2 out of 4 the phase current setting, Pickup_PH can be checked by single-phase injection
Pickup_PH current level is best made in FunctionMode = Current and BuTripMode
RetripMode = Off and FunctionMode = Current is set, only backup trip can be
If
used to check set Pickup_PH .
Pickup_N current where setting FunctionMode = Current and setting
© Copyright 2017 ABB. All rights reserved
Pickup_N is easiest checked in back-up trip mode 1 out of
Pickup_PH
Pickup_PH .
Pickup_N .
Testing functionality by secondary injection
"Preparing the IED to verify
1 out of 3 , it is sufficient to test
Pickup_N set below
Section 11
M12104-2 v13
M12104-23 v14
M12104-80 v10
M12104-93 v12
169