wear, travel time, number of operation cycles and accumulated energy during arc
extinction.
17.4.3.1 Setting procedure on the IED
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.
tDGasPresAlm: Time delay for gas pressure alarm.
tDGasPresLO: Time delay for gas pressure lockout.
DirCoef: Directional coefficient for circuit breaker life calculation.
RatedOperCurr: Rated operating current of the circuit breaker.
1MRK 502 071-UEN - Section 17
Monitoring
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 641
Application manual
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