1MAC309294-MB F Section 6
Condition monitoring functions
RER620 367
Technical Manual
6.1.4.7 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.
Figure 201: Functional module diagram for circuit breaker spring charged indication
and alarm
Spring charge time measurement
Two binary inputs, SPR_CHR_ST and SPR_CHR, 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 T_SPR_CHR is available through the Monitored data view on
the LHMI or through tools via communications.
Alarm limit check
If the time taken by the spring to charge is more than the value set with the Spring charge
time setting, the subfunction generates the SPR_CHR_ALM alarm.
It is possible to block the SPR_CHR_ALM alarm signal by activating the BLOCK binary
input.
6.1.4.8 Gas pressure supervision
The gas pressure supervision subfunction monitors the gas pressure inside the arc
chamber.
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.
This subfunction is not applicable to magnetic actuators.
This subfunction is not applicable to vacuum interruption.
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