ABB Relion 670 Series Commissioning Manual page 89

1MRK 505 372-UUS Rev. K
10.4.6 Breaker failure protection, phase segregated activation and
output CCRBRF (50BF)
Prepare the IED for verification of settings outlined in Section
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 1 out of 3, it is sufficient to test phase-to-
ground faults.
At mode 2 out of 4 the phase current setting, Pickup_PH can be checked by single-phase injection where
the return current is connected to the summated current input. The value of residual (ground fault)
current IN set lower than Pickup_N is easiest checked in back-up trip mode 1 out of 4.
10.4.6.1 Function revision history
Document
revision
A
B
C
D
E
F
G
H
10.4.6.2 Checking the phase current trip value, Pickup_PH
The check of the Pickup_PH 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 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 Pickup_PH.
Busbar protection REB670
Commissioning manual
Product History
revision
2.2.1 I>BlkCBPos setting functionality correction.
2.2.1 -
2.2.2 -
2.2.3 Setting StartMode is added to choose how retrip and backup trip timers are run. The choices
are; to run the timers by external start signal which is latched, to follow the external start
signal only or to follow the external start signal and the selected FunctionMode.
2.2.3 -
2.2.4 -
2.2.4 -
2.2.5 -
If RetripMode = Off and FunctionMode = Current is set, only backup trip can be used to
check set Pickup_PH.
© 2017 - 2022 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
"Preparing the IED to verify
GUID-3A043295-3AE3-437E-BBE9-D7FD6F349892 v2
Section 10
M12104-2 v13
settings".
M12104-23 v14
83