Circuit Breaker Spring-Charged Indication - ABB RELION REX640 Technical Manual

1MRS759142 C
7.1.5.7
7.1.5.8
REX640
Technical Manual

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 with a module diagram. All the
modules in the diagram are explained in the next sections.
GUID-67185B9E-E75F-4C15-8825-000532FD3515 V1 EN
Figure 692: 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.
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.
Condition monitoring functions
Section 7
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