Inactivity timerThe module calculates the number of days the circuit breaker has remained inactive,that is, has stayed in the same open or closed state. The calculation is done bymonitoring the states of the POSOPEN and POSCLOSE auxiliary contacts.The inactive days NOOPRDAY is available through the Monitored data view. It is alsopossible to set the initial inactive days by using the InactDayInit parameter.Alarm limit checkWhen the inactive days exceed the limit value defined with the InactDayAlm setting,the NOOPRALM alarm is initiated. The time in hours at which this alarm is activatedcan be set with the InactHourAlm parameter as coordinates of UTC. The alarm signalNOOPRALM can be blocked by activating the binary input BLOCK.14.17.7.3 Breaker contact travel timeThe breaker contact travel time module calculates the breaker contact travel time forthe closing and opening operation. The operation of the breaker contact travel timemeasurement can be described by using a module diagram. All the modules in thediagram are explained in the next sections.GUID-4D82C157-53AF-40C9-861C-CF131B49072B V1 ENFigure 219: Functional module diagram for breaker contact travel timeTravelling time calculatorThe breaker contact travel time is calculated from the time between auxiliary contacts'state change. The open travel time is measured between the opening of thePOSCLOSE auxiliary contact and the closing of the POSOPEN auxiliary contact.Travel time is also measured between the opening of the POSOPEN auxiliary contactand the closing of the POSCLOSE auxiliary contact.Section 14 1MRK 504 135-UEN AMonitoring504Technical manual
