ABB REL650 Technical Manual page 585

1MRK 506 382-UEN A
14.4.7.3
Line distance protection REL650 2.2 IEC
Technical manual
contacts have the same value or if the auxiliary input contact POSCLOSE is low
and the POSOPEN input is high but the current is above the setting AccStopCurr.
The status of the breaker is indicated with the binary outputs OPENPOS,
CLOSEPOS and INVDPOS for open, closed and error position respectively.
Remaining life of circuit breaker
The Remaining life of circuit breaker subfunction is used to give an indication on
the wear and tear of the circuit breaker. Every time the breaker operates, the life of
the circuit breaker reduces due to wear. The breaker wear depends on the
interrupted current. The remaining life of the breaker is estimated from the circuit
breaker trip curve provided by the manufacturer. The remaining life is decreased by
at least one when the circuit breaker is opened. The operation of the remaining life
of circuit breaker subfunction is described in figure 296.
I3P-ILRMSPH
POSCLOSE
RSTCBWR
BLOCK
BLKALM
IEC12000620 V3 EN-US
Figure 296: Functional module diagram for estimating the life of the circuit
breaker
Circuit breaker remaining life estimation
If the interrupted current is less than the rated operating current set using the
RatedOperCurr setting, the remaining operations of the breaker are reduced by one
operation. If the interrupted current is more than the rated fault current set using the
RatedFltCurr setting, the remaining operations of the circuit breaker are reduced
by the set OperNoRated divided by the set OperNoFault value. If the tripping
current is between these two values, the remaining life of the circuit breaker is
calculated based on the maintenance curve equation given by the manufacturer.
The OperNoRated parameter sets the number of operations the breaker can perform
at the rated current. The OperNoFault parameter sets the number of operations the
breaker can perform at the rated fault current.
Alarm limit check
When the remaining life of a circuit breaker phase drops below the
CBLifeAlmLevel setting, the life alarm CBLIFEAL is activated.
It is possible to deactivate the CBLIFEAL alarm signal by activating the binary
input BLKALM.
CB remaining
life estimation
Alarm limit
Section 14
Monitoring
GUID-C347406A-2B6F-42BD-B70B-51489AB51EAE v12
Check
IEC12000620-3-en.vsd
CBLIFEPH
CBLIFEAL
579