DC Controller
UPC4 Master
User Manual
Page 55/100
©2010. ELTEK VALERE DEUTSCHLAND GmbH. UM_UPC4_V2.00_E_R1.1_2011-01-04
6.4.5 System parameters
"REC Nom. voltage" (4.1) is the float charge
voltage. In systems in which no batteries are
used it simply is the default voltage of the
rectifiers.
"REC Boost chge V" (4
.2)
*8.1
is the boost
charge voltage, whereas "REC Equalize Vol"
is the equalize charge voltage (4.3)
*7.3
.
These values indicate how the maximum
def
ault voltage value should be set by the
regulator in case of float/boost/equalize
charge.
For boost charge no temperature balancing is available. If temperature sensors are used, the other
def
ault voltage values are corrected depending on temperature.
Parameter "REC Batt test V." (4.4)
indicates to which voltage value the rectifiers shall be set during
battery test. This value must be below nominal battery voltage in order to withdraw current out of the
batteries.
"REC Nom. current" (4.5) is se
nt as default via CAN bus to the rectifiers. Normally the value according to
the type plate of the rectifier is keyed in.
"REC load limit" (4.6) is associat
ed to the set "REC Nom. current".
The measured current of all rectifiers is compared to the maximum possible current ("Rec count"
multipli
ed by "REC Nom. current" (4.5))".
Parameter (4
.7) and (4.8) enable the monitoring of rectifier load distribution. This feature is only
applicable in systems with more than one rectifier.
If the percentage of the difference
of maximum and minimum rectifier current to maximum rectifier
current is more than the value (4.7) for more than (4
.8) seconds, the event bit "RECLoadDist" is set.
LoadDis
axc
incaxc
ImRe
%100*)ImReIm(Re
The load distribution usually is worse at low system loa
d. So the monitoring of the load distribution is
only active, if the percentage of the rectifier which delivers the current with the greatest value
compared to the nominal current exceeds the value (4.9) for more than (4.10) seconds.
In systems with inverters but without static bypass switch (STS/UNB) the nominal invert
er output
voltage value "INV nom. voltage" (4.11) is sent by the UPC4 via CAN-Bus to the inverters.
In section 6.4.3 "Charge control
" (Regulator) the control process for battery charging is described.
4.1
4.2
4.4
4.5
4.3
4.6
4.11
4.10
4.7
4.9
4.8
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