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
.
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
Summary of Contents for Relion REG670
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