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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
.
14.4.7.4
Accumulated energy
GUID-0163FF0F-6E18-4CDC-87AA-578304E0872E v11
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
.
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-US
Figure 297:
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.
The
ContTrCorr
setting is used to determine the accumulated energy in relation to
the time the main contact opens. If the setting is positive, the calculation of energy
starts after the auxiliary contact has opened and the delay equal to the value of the
ContTrCorr
setting has passed. When the setting is negative, the calculation starts
in advance by the correction time in relation to when the auxiliary contact opened.
Section 14
1MRK 506 382-UEN A
Monitoring
580
Line distance protection REL650 2.2 IEC
Technical manual
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