GUID-DAC3746F-DFBF-4186-A99D-1D972578D32A V1 EN
Figure 270:
Functional module diagram for calculating accumulative energy and
alarm
Accumulated energy calculator
This module calculates the accumulated energy I
y
t [(kA)
y
s]. The factor y is set with
the
CurrExp
setting.
The calculation is initiated with the
POSCLOSE
input open events. It ends when the
RMS current becomes lower than the
AccDisLevel
setting value.
GUID-75502A39-4835-4F43-A7ED-A80DC7C1DFA2 V1 EN
Figure 271:
Significance of theDiffTimeCorr setting
The
DiffTimeCorr
setting is used instead of the auxiliary contact to accumulate the
energy from the time the main contact opens. If the setting is positive, the calculation
of energy starts after the auxiliary contact has opened and when the delay is equal to
the value set with the
DiffTimeCorr
setting. When the setting is negative, the
calculation starts in advance by the correction time before the auxiliary contact opens.
The accumulated energy outputs
IACCL1 (L2, L3)
are available through the
Monitored data view on the LHMI or through tools via communications. The values
can be reset by setting the
Clear accum. breaking curr
setting to on in the clear menu
from LHMI.
1MRK 502 048-UEN A
Section 14
Monitoring
569
Technical manual
Summary of Contents for REG650 ANSI
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