ABB RES670 Technical Manual page 548

Section 16
Monitoring
542
I3P-IL
I3P-ILRMSPH
POSCLOSE
TRIND
LRSTIPOW
BLOCK
BLKALM
IEC12000619 V3 EN-US
Figure 212: 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
POSCLOSE 1
0
Energy
Accumulation
starts
ContTrCorr
(Negative)
IEC12000618 V1 EN-US
Figure 213: 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
Accumulated
energy
calculation
Alarm limit
Main Contact
close
open
POSCLOSE
Energy
Accumulation
starts
1MRK 511 408-UUS A
IPOWALPH
Check
IPOWLOPH
IEC12000619-3-en.vsd
1
0
ContTrCorr
(Positive)
IEC12000618_1_en.vsd
Phasor measurement unit RES670 2.2 ANSI
Technical manual
TRCMD
IPOWPH
open