ABB Relion 650 Series Technical Manual page 208

Section 6
Current protection
Breaker failure protection (CCRBRF, 50BF) current criteria can be fulfilled by one or two phase
currents, or one phase current plus residual current. When those currents exceed the user defined
settings, the function is activated. These conditions increase the security of the back-up trip
command.
CCRBRF (50BF) function can be programmed to give a three-phase re-trip of the protected
breaker to avoid unnecessary tripping of surrounding breakers.
6.10.3 Function block
I3P*
BLOCK
BFI_3P
52A_A
52A_B
52A_C
ANSI09000272 V1 EN-US
Figure 105: CCRBRF (50BF) function block
6.10.4 Signals
Table 112: CCRBRF (50BF) Input signals
Name
I3P
BLOCK
BFI_3P
52a_A
52a_B
52a_C
Table 113: CCRBRF (50BF) Output signals
Name
TRBU
TRRET
202
CCRBRF (50BF)
TRBU
TRRET
ANSI09000272-1-en.vsd
Type
GROUP
SIGNAL
BOOLEAN
BOOLEAN
BOOLEAN
BOOLEAN
BOOLEAN
Type
BOOLEAN
BOOLEAN
© Copyright 2011 ABB Power Grids. All rights reserved
Default Description
- Three phase group signal for current inputs
0 Block of function
0 Three phase breaker failure initiation
1 Circuit breaker closed in phase A
1 Circuit breaker closed in phase B
1 Circuit breaker closed in phase C
Description
Back-up trip by breaker failure protection function
Retrip by breaker failure protection function
1MRK 506 326-UUS B
M11944-3 v6
PID-1160-INPUTSIGNALS v5
PID-1160-OUTPUTSIGNALS v5
Line distance protection REL650
Technical manual