The Transfer System - Studer XP-COMPACT-XPC 1400-12 User's And Installer's Manual

STUDER Innotec
The charging current is displayed on POWER MONITOR (25) of the front panel
or on the Remote Control.
4.7.5 Battery Condition
Built-in microprocessor with a specially developed algorithm calculates the actual
state of charge of the battery and displays it on LED 15 – 18. The LED 14 is lit when
the system is carrying out a charge cycle with equalization.
Notice : the exact measure of the battery state of charge with electrical parameters is
al-most impossible. The display of the state of charge is always more or less precise.
The measure system built in the XP-COMPACT takes into account the battery
voltage, the discharge and charge current as well as the undulation of the voltage. If
the battery and the XP-COMPACT are used according to their technical data, the
battery state of charge is displayed accurately. In the following cases of use the
display can diverge:
− Battery charge or discharge with too high
currents
− Battery cable cross section too small
− Battery connections badly tightened or
corroded
− Charge of the battery with external battery
charger
− Discharge of the battery with users not
connected to the XP-COMPACT
− Work with defective or sulphated batteries
This means that the display can, within few
minutes during the charge, commute from 25%
to 75% or during the discharge, to the opposite
direction.
As many of the working cases mentioned above often occur, the measure system of
the XP-COMPACT takes into account, during the charge, only the peaks of the
voltage undulation. As a consequence, the battery voltage at the start of the
absorption stage, measured by a voltmeter will appear deeper. By decrease of the
charge current the voltage will reach the exact values.
For safety reasons, you must get the recommended charge voltage and charge
currents from your battery supplier. The voltage levels and charge characteristics can
be changed through Programming. The instruction for programming of battery
charger is in the section „Programming" (Chap. 5.3). The correct charging is
mandatory for a safe function and a long-life of the battery.
The battery charger functions are described by the graphic in chap. 4.7.1.
4.8

The Transfer system

When an AC voltage is at the input AC IN of the XP-COMPACT, the LED 1 AC IN is
lit. When this voltage matches the lowest adjusted value set by the Turning Knob 23
TRANSFER, and the frequency is between 44Hz and 65Hz, this voltage is switched
directly to the battery charger and to the output AC OUT. The LED 7 TRANSFER is
lit. The inverter is switched off and the battery charger switched on. This process is
automatic, unless the charger mode or the transfer mode is disabled (see Chap. 5.5).
The maximum current of the Transfer switch is 16A. That means through this system,
consuming devices up to a maximum of al 3700 Watt can be operated. When the
XP-COMPACT V5.7
XP-COMPACT
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