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 201:
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
Figure 202:
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
Section 16
1MRK 511 365-UUS A
Monitoring
534
Phasor measurement unit RES670 2.1 ANSI
Technical manual
Содержание Relion 670 Series RES670
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