The remaining life is calculated separately for all three phases and it is available as amonitored data value CBLIFEL1 (L2, L3). The values can be cleared by settingthe parameter CB wear values in the clear menu from LHMI.Clearing CB wear values also resets the operation counter.Alarm limit checkWhen the remaining life of any phase drops below the LifeAlmLevel threshold setting,the corresponding circuit breaker life alarm CBLIFEAL is activated.It is possible to deactivate the CBLIFEAL alarm signal by activating the binary inputBLOCK. The old circuit breaker operation counter value can be taken into use bywriting the value to the Initial CB Rmn life parameter and resetting the value via theclear menu from LHMI.It is possible to deactivate the CBLIFEAL alarm signal by activating the binary inputBLOCK.12.18.7.7 Circuit breaker spring charged indicationThe circuit breaker spring charged indication subfunction calculates the springcharging time.The operation of the subfunction can be described by using a module diagram. All themodules in the diagram are explained in the next sections.GUID-37EB9FAE-8129-45AB-B9F7-7F7DC829E3ED V1 ENFigure 239: Functional module diagram for circuit breaker spring chargedindication and alarmSpring charge time measurementTwo binary inputs, SPRCHRGN and SPRCHRGD, indicate spring charging started andspring charged, respectively. The spring charging time is calculated from thedifference of these two signal timings.The spring charging time SPRCHRT is available through the Monitored data view .1MRK 511 287-UEN A Section 12Monitoring499Technical manual
