ABB REG670 - Accumulated Energy

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.
16.4.7.4 Accumulated energy
The Accumulated energy subfunction calculates the accumulated energy (I
y
t) based
on current samples, where the setting CurrExponent (y) ranges from 0.5 to 3.0. The
operation is described in
Figure 431.
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.
POSCLOSE
BLOCK
BLKALM
Accumulated
energy
calculation
Alarm limit
Check
I3P-ILRMSPH
LRSTIPOW
TRIND
IPOWPH
IPOWALPH
IPOWLOPH
I3P-IL
TRCMD
IEC12000619-3-en.vsd
IEC12000619 V3 EN
Figure 431: Functional module diagram for estimating accumulated energy
Accumulated energy calculation
Accumulated energy can be calculated either with TRIND or POSCLOSE by selecting
the AccSelCal parameter value accordingly.
The calculation is initiated with the POSCLOSE or TRIND input events. It ends when
the RMS current is lower than the AccStopCurr setting.
1MRK502052-UEN B Section 16
Monitoring
905
Technical manual