Figure 288: 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 in 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.
7.1.4.8 Gas pressure supervision
The gas pressure supervision subfunction monitors the gas pressure inside the arc
chamber.
The operation of the subfunction can be described with a module diagram. All the
modules in the diagram are explained in the next sections.
Figure 289: Functional module diagram for circuit breaker gas pressure alarm
The gas pressure is monitored through the binary input signals PRES_LO_IN and
PRES_ALM_IN.
Timer 1
When the PRES_ALM_IN binary input is activated, the PRES_ALM alarm is activated
after a time delay set with the
Pressure alarm time
setting. The PRES_ALM alarm can
be blocked by activating the BLOCK input.
Condition monitoring functions
1MRS758755 C
560 REC615 & RER615
Technical Manual
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