ABB RELION Series, Technical Manual

Page: 550 / 804

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.
7.1.4.7 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 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.
7.1.4.8 Gas pressure supervision
The gas pressure supervision subfunction monitors the gas pressure inside the arc
chamber.
Section 7
1MRS758755 A
Condition monitoring functions
544 REC615 and RER615
Technical Manual