ABB REG650 Technical Manual page 443

1MRK 502 034-UEN -
Technical Manual
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Figure 212: Functional module diagram for calculating accumulative energy
and alarm
Accumulated energy calculator
This module calculates the accumulated energy I
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.
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Figure 213: 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 true in the
clear menu from LHMI.
Section 13
Monitoring
y y
t [(kA) s]. The factor y is set with
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