10.4.3
Setting guidelines
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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.
10.4.3.1
Setting procedure on the IED
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The parameters for breaker monitoring (SSCBR) can be set using 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.
OperLOLevel
: Lockout limit for number of mechanical operations.
CurrExponent
: Current exponent setting for energy calculation. It varies for
different types of circuit breakers. This factor ranges from
0.5
to
3.0
.
AccStopCurr
: RMS current setting below which calculation of energy
accumulation stops. It is given as a percentage of
IBase
.
ContTrCorr
: Correction factor for time difference in auxiliary and main contacts'
opening time.
AlmAccCurrPwr
: Setting of alarm level for accumulated energy.
LOAccCurrPwr
: Lockout limit setting for accumulated energy.
SpChAlmTime
: Time delay for spring charging time alarm.
1MRK 511 423-UEN A
Section 10
Monitoring
Bay control REC650 2.2 IEC
209
Application manual
