13.4.3 Setting guidelines GUID-AB93AD9B-E6F8-4F1A-B353-AA1008C15679 v2The breaker monitoring function is used to monitor different parameters of thecircuit breaker. The breaker requires maintenance when the number of operationshas reached a predefined value. For proper functioning of the circuit breaker, it isalso essential to monitor the circuit breaker operation, spring charge indication orbreaker wear, travel time, number of operation cycles and accumulated energyduring arc extinction.13.4.3.1 Setting procedure on the IED GUID-4E895FEA-74BF-4B11-A239-0574F8FF5188 v4The parameters for breaker monitoring (SSCBR) can be set using the local HMI orProtection 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 functionGBASVAL.GlobalBaseSel: It is used to select a GBASVAL function for reference of basevalues.Operation: On or Off.IBase: Base phase current in primary A. This current is used as reference forcurrent 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 fordifferent types of circuit breakers. This factor ranges from 0.5 to 3.0.AccStopCurr: RMS current setting below which calculation of energyaccumulation 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 504 169-UEN A Section 13MonitoringTransformer protection RET650 2.2 IEC 283Application manual
