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1MRK 506 369-UEN B
18.4.3
18.4.3.1
Line distance protection REL670 2.2 IEC
Application manual
Setting guidelines
The breaker monitoring function is used to monitor different parameters of the
circuit breaker. The breaker requires maintenance when the number of operations
has reached a predefined value. For proper functioning of the circuit breaker, it is
also essential to monitor the circuit breaker operation, spring charge indication or
breaker wear, travel time, number of operation cycles and accumulated energy
during arc extinction.
Since there is no current measurement in SAM600-IO, evaluation
of the following parameters are not possible in the circuit breaker
condition monitoring function (SSCBR):
•
Circuit breaker status
•
Remaining life of the circuit breaker
•
Contact erosion estimation
•
Circuit breaker contact travel time
Ensure that OPENPOS, CLOSEPOS, INVDPOS, CBLIFEAL,
IPOWALPH, IPOWLOPH, TRVTOPAL and TRVTCLAL signals
are not used in SAM600–IO.
Setting procedure on the IED
The parameters for breaker monitoring (SSCBR) can be set via the local HMI or
Protection and Control Manager (PCM600).
Common base IED values for primary current (IBase), primary voltage (UBase)
and primary power (SBase) are set in Global base values for settings function
GBASVAL.
GlobalBaseSel: It is used to select a GBASVAL function for reference of base
values.
Operation: On or Off.
IBase: Base phase current in primary A. This current is used as reference for
current settings.
OpenTimeCorr: Correction factor for circuit breaker opening travel time.
CloseTimeCorr: Correction factor for circuit breaker closing travel time.
tTrOpenAlm: Setting of alarm level for opening travel time.
tTrCloseAlm: Setting of alarm level for closing travel time.
OperAlmLevel: Alarm limit for number of mechanical operations.
Section 18
Monitoring
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