ABB Relion 650 Series Applications Manual page 95

1MRK 505 287-UUS B
7.4.3 Setting guidelines
The parameters for Breaker failure protection 3-phase activation and output CCRBRF (50BF) are
set via the local HMI or PCM600.
The following settings can be done for the breaker failure protection.
GlobalBaseSel : Selects the global base value group used by the function to define ( IBase ), ( VBase )
and ( SBase ).
Operation : Disabled / Enabled
FunctionMode This parameter can be set Current or Contact . This states the way the detection of
failure of the breaker is performed. In the mode current the current measurement is used for the
detection. In the mode
failure of the breaker. The mode
activated.
breaker is small. This can be the case for some generator protection application (for example
reverse power protection) or in case of line ends with weak end infeed.
RetripMode : This setting states how the re-trip function shall operate. Retrip Off means that the
re-trip function is not activated.
that a phase current must be larger than the operate level to allow re-trip.
breaker position check) and
position is used).
Table 12:
RetripMode
Retrip Off
CB Pos Check
No CBPos Check
BuTripMode : Back-up trip mode is given to state sufficient current criteria to detect failure to
break. For
currents and the residual current, shall be high to indicate breaker failure.
least one current of the three-phase currents shall be high to indicate breaker failure.
means that at least one current of the three-phase currents or the residual current shall be high to
Busbar protection REB650
Application manual
Contact the long duration of breaker position signal is used as indicator of
Current&Contact means that both ways of detections are
Contact mode can be usable in applications where the fault current through the circuit
CB Pos Check (circuit breaker position check) and Current means
Contact means re-trip is done when circuit breaker is closed (breaker
No CBPos Check means re-trip is done without check of breaker position.
Dependencies between parameters RetripMode and FunctionMode
Current operation 2 out of 4 means that at least two currents, of the three-phase
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FunctionMode
N/A
Current
Contact
Current&Contact
Current
Contact
Current&Contact
Current protection
CB Pos Check (circuit
Description
the re-trip function is not activated
re-trip is done if phase current is
larger than the operate level after
re-trip time has elapsed
re-trip is done when auxiliary
contact position indicates that
breaker is still closed after re-trip
time has elapsed
both methods according to above
are used but taken into account
also I>BlkCont
re-trip is done without check of
current level
re-trip is done without check of
auxiliary contact position
re-trip is done without check of
current level or auxiliary contact
position
1 out of 3 means that at
1 out of 4
Section 7
M11546-4 v6.1.1
89