Accumulated Energy - ABB Relion 670 Series RES670 Technical Manual

1MRK 511 365-UUS A
16.4.7.4
Phasor measurement unit RES670 2.1 ANSI
Technical manual
I3P-ILRMSPH
POSCLOSE
RSTCBWR
BLOCK
BLKALM
IEC12000620 V3 EN
Figure 200: 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.
The old circuit breaker operation counter value can be used by adding the value to the
InitCBRemLife parameter. The value can be reset using the Clear menu from LHMI or by
activating the input RSTCBWR.

Accumulated energy

The Accumulated energy subfunction calculates the accumulated energy (I
current samples, where the setting CurrExponent (y) ranges from 0.5 to 3.0. The operation
is described in Figure 201.
The TRCMD output is enabled when either of the trip indications from the trip coil circuit
TRIND is high or the breaker status is OPENPOS.
CB remaining
life estimation
Alarm limit
Section 16
Monitoring
CBLIFEPH
CBLIFEAL
Check
IEC12000620-3-en.vsd
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