POSCLOSEPOSOPENRSTCBWRBLOCKBLKALMOperationcounterAlarm limitCheckNOOPEROPERALMOPERLOIEC12000617 V2 ENFigure 433: Functional module diagram for circuit breaker operation cyclesOperation counterThe operation counter counts the number of operations based on the state of change ofthe auxiliary contact inputs POSCLOSE and POSOPEN.The number of operations NOOPER is given as a service value. The old circuitbreaker operation counter value can be used by adding the value to the InitCounterValparameter and can be reset by Clear CB wear in the Clear menu on the LHMI oractivating the input RSTCBWR.Alarm limit checkOPERALM is generated when the number of operations exceeds the set value of theOperAlmLevel threshold setting.If the number of operations increases and exceeds the limit value set with theOperLOLevel setting, the OPERLO output is activated.The binary outputs OPERALM and OPERALO are deactivated when the BLKALM inputis activated.16.4.7.6 Circuit breaker operation monitoringThe circuit breaker operation monitoring subfunction indicates the inactive days ofthe circuit breaker and gives an alarm when the number of days exceed the set level.The operation of the circuit breaker operation monitoring is shown in figure 434.POSCLOSEPOSOPENBLOCKBLKALMInactive timerAlarm limitCheckINADAYSMONALMIEC12000614 V2 ENFigure 434: Functional module diagram for circuit breaker operation monitoring1MRK502052-UEN B Section 16Monitoring907Technical manual
