DC Controller
UPC4 Master
User Manual
Page 70/100
©2010. ELTEK VALERE DEUTSCHLAND GmbH. UM_UPC4_V2.00_E_R1.1_2011-01-04
ignores the date and boost charge will start at the time as set. In the following boost charge will be
executed according to the interval as set.
Boost charge runs as long as the battery voltage has exceeded the parameter (27.8)
*8.1
over (27.9)
*8.1
seconds plus the "Follow up charge duration" as set (27.10)
*8.1
.
Boost charge time can be additionally limited according to parameter "Timeout" (27.11
)
*8.1
.
If an optional fan rack is used, the fans run on for additional time (27.1
2)
*8.1
after finishing boost
charge.
6.10.4 Capacity Calculator*
(*requires 9.9), see section 6.4.4.
In this area the configuration of the
capa
city calculator is done.
NOTE: The capacity calculator works
exclusiv
ely with lead acid batteries.
The capacity calculator calculates the expected available capacity of the batteries (on the basis of a
ful
ly charged battery). A fully charged battery is detected by the UPC4 if the battery charge voltage ≥
the charging end voltage for a minimum of 150 seconds. This voltage results from the parameters
System parameters
(28.1)
*9.9
, see section 6.4.5. At this condition the percentages of the set nominal
capacity (28.2)
*9.9
is assumed as available capacity (see section 6.4.6 Battery).
Subsequently the charge current is permanently estimated and resulting from that the still available
c
apacity is calculated. The estimation of the discharge/charge current relates to the current I10. I10 is
the 10
th
part of the current related to the nominal battery capacity.
Example: Nominal capacity= 50Ah >> I10= 5A.
The capacity calculation is based on an estimation of the charge current and discharge current
resp
ectively because the behaviour of the available capacity is not linear to the battery currents.
Parameter p = 50% is factory preset as default for the estimation of the current.
Calculation: (Default 50 relates to factor=1), see t
he table below. The table shows the dependency of
the parameter p (%) to the factor F. This table is valid for battery current Ib = current I10.
Factor F is calc
ulated according to the formula as follows:
)30(*10
)130(*
pi
pib
F
P= Parameter 50 %
Ib= measured battery current
I10 (A)= Nominal capacity (Ah)/ 10 h
The following table is valid for Ib=
I10:
28.2
28.5
28.1
28.6
28.7
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