Setting Guidelines - ABB REC670 Applications Manual

1MRK 511 401-UUS A
8.9.3
Bay control REC670 2.2 ANSI
Application manual

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 as applicable.
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 Contact the long duration of
breaker position signal is used as indicator of failure of the breaker. The mode Current/
Contact means that both ways of detections are activated. Contact mode can be usable
in applications where the fault current through the circuit 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. CB Pos Check (circuit breaker position check)
and Current means that a phase current must be larger than the operate level to allow
re-trip. CB Pos Check (circuit breaker position check) and Contact means re-trip is
done when circuit breaker is closed (breaker position is used). No CBPos Check means
re-trip is done without any check of breaker position.
Table 25: Dependencies between parameters RetripMode and FunctionMode
RetripMode
Retrip Off
CB Pos Check
Table continues on next page
FunctionMode
N/A
Current
Contact
Current/Contact
Section 8
Current protection
M11546-4 v9
Description
the re-trip function is not
activated
re-trip is done if the 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
I>BlkCont
also
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