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 549: 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.
Main Contact
close
open
POSCLOSE
1
0
Energy
Accumulation
starts
ContTrCorr
(Negative)
Main Contact
close
POSCLOSE
Energy
Accumulation
starts
ContTrCorr
(Positive)
1
0
open
IEC12000618_1_en.vsd
IEC12000618 V1 EN-US
Figure 550: Significance of correction factor setting
Accumulated energy can also be calculated by using the change of state of the trip output.
TRIND
is used to get the instance of the trip output and the time delay between the trip initiation and the
opening of the main contact is introduced by the setting
OperTimeDelay.
The accumulated energy output
IPOWPH
is provided as a service value. The value can be reset by
enabling
RSTIPOW
through LHMI or by activating the input
RSTIPOW
.
Section 16
1MRK 502 066-UUS B
Monitoring
1056
Technical manual
Summary of Contents for Relion 670 series
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