Breaker Failure Protection Phase Segregated Activation And Output Csprbrf (50Bf) - ABB REL650 series Technical Manual

Section 7
Current protection
7.11
7.11.1
7.11.2
262
Function
Reset ratio
Timers
Operate time for current
detection
Reset time for current
detection
Breaker failure protection phase segregated activation
and output CSPRBRF (50BF)
Identification
Function description IEC 61850 identification
Breaker failure CSPRBRF
protection, phase
segregated activation
and output
FunctionalityBreaker failure protection, phase segregated
activation and output
Breaker failure protection for single pole tripping applications CSPRBRF (50BF) ensures
fast back-up tripping of surrounding breakers in case the protected breaker fails to open.
CSPRBRF (50BF) can be current based, contact based, or adaptive combination between
these two principles.
A current check with extremely short reset time is used as a check criterion to achieve a
high security against inadvertent operation.
A contact check criteria can be used where the fault current through the breaker is small.
CSPRBRF (50BF) function 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.
CSPRBRF (50BF) can be programmed to give a single- or three-phase re-trip of the
protected breaker to avoid inadvertent tripping of surrounding breakers at an incorrect
initiation due to mistakes during testing.
Range or value
> 95%
(0.000-60.000) s
20 ms typically
10 ms maximum
IEC 60617 identification
SYMBOL-U V1 EN
1MRK 506 335-UUS A
Accuracy
-
± 0.5% ±10 ms
-
-
ANSI/IEEE C37.2 device
number
50BF
3I>BF
Technical manual