The remaining life is calculated separately for all three phases and it is available as a
monitored data value CBLIFEL1 (L2, L3). The values can be cleared by setting
the parameter CB wear values in the clear menu from LHMI.
Clearing CB wear values also resets the operation counter.
Alarm limit check
When 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 input
BLOCK. The old circuit breaker operation counter value can be taken into use by
writing the value to the Initial CB Rmn life parameter and resetting the value via the
clear menu from LHMI.
It is possible to deactivate the CBLIFEAL alarm signal by activating the binary input
BLOCK.
12.18.7.7 Circuit breaker spring charged indication
The circuit breaker spring charged indication subfunction calculates the spring
charging time.
The operation of the subfunction can be described by using a module diagram. All the
modules in the diagram are explained in the next sections.
GUID-37EB9FAE-8129-45AB-B9F7-7F7DC829E3ED V1 EN
Figure 239: Functional module diagram for circuit breaker spring charged
indication and alarm
Spring charge time measurement
Two binary inputs, SPRCHRGN and SPRCHRGD, indicate spring charging started and
spring charged, respectively. The spring charging time is calculated from the
difference of these two signal timings.
The spring charging time SPRCHRT is available through the Monitored data view .
1MRK 511 287-UEN A Section 12
Monitoring
499
Technical manual
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