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

Section 7
Condition monitoring functions
7.1.4.7
7.1.4.8
544
Alarm limit check
When the remaining life of any phase drops below the Life alarm level threshold
setting, the corresponding circuit breaker life alarm CB_LIFE_ALM is activated.
It is possible to deactivate the CB_LIFE_ALM 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 WHMI or LHMI.

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.
A071112 V3 EN
Figure 289: 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.
1MRS758755 A
REC615 and RER615
Technical Manual