ABB Relion 650 Series Technical Manual page 503

1MRK 506 326-UUS B
Alarm limit check
The IACCALM alarm is activated when the accumulated energy exceeds the value set with the
AccCurrAlmLvl threshold setting. However, when the energy exceeds the limit value set with the
AccCurrLO threshold setting, the IACCLOAL output is activated.
The IACCALM and IACCLOAL outputs can be blocked by activating the binary input BLOCK.
13.17.7.6 Remaining life of the circuit breaker
Every time the breaker operates, the life of the circuit breaker reduces due to wearing. The
wearing in the breaker depends on the tripping current, and the remaining life of the breaker is
estimated from the circuit breaker trip curve provided by the manufacturer. The remaining life is
decremented at least with one when the circuit breaker is opened.
The operation of the remaining life of the circuit breaker subfunction can be described by using a
module diagram. All the modules in the diagram are explained in the next sections.
I3P
POSCLOSE
CBCNTRST
BLOCK
BLK_ALM
GUID-1565CD41-3ABF-4DE7-AF68-51623380DF29-ANSI V1 EN-US
Figure 260: Functional module diagram for estimating the life of the circuit breaker
Circuit breaker life estimator
The circuit breaker life estimator module calculates the remaining life of the circuit breaker. If the
tripping current is less than the rated operating current set with the
remaining operation of the breaker reduces by one operation. If the tripping current is more than
the rated fault current set with the
remaining life of the tripping current in between these two values is calculated based on the trip
curve given by the manufacturer. The
number of operations the breaker can perform at the rated current and at the rated fault current,
respectively.
.The remaining life is calculated separately for all three phases and it is available as a monitored
data value CBLIFE_A (_B, _C). The values can be cleared by setting the parameter
values in the clear menu from LHMI.
Line distance protection REL650
Technical manual
I_A
CB life
I_B
estimator
I_C
RatedFaultCurr setting, the possible operations are zero. The
OpNumRatCurr and OPNumFaultCurr parameters set the
CB wear values also resets the operation counter.
Clearing
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Alarm limit
CBLIFEAL
check
RatedOpCurr setting, the
Section 13
Monitoring
GUID-C347406A-2B6F-42BD-B70B-51489AB51EAE v6
CB wear
497