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Operating instructions
Electric-System EVS 34/12-DS/IU
CALIRA
Electronic GmbH & Co. KG
Lerchenfeldstr. 9 87600 Kaufbeuren
Tel.+49(0)8341/9764-0 Fax +49(0)8341/67806
Internet: http://www.calira.de
Email: [email protected]
is generated via an isolation transformer and a two-way thyristor rectifier
circuit.
In the main charging mode, the electrical power supply delivers a current
limited to 12 A until the battery achieves a level of 14 V. From 14 V onward, the
charging current drops until battery voltage reaches 14.4 V. A timer is now
activated automatically, and the power supply holds the battery voltage con-
stant at 14.4 V for 6 hours. On expiry of these 6 hours, the power supply
switches over to holding charge with a constant voltage of 13.8 V. The charging
process follows the charging characteristic curve IUoU (Figure 13), with mini-
mal energy loss.
If the consumer draws from the battery current that exceeds the rated value, and
battery voltage drops as a result below a predetermined value, the main
charging process automatically starts. This also happens during the six-hour
duration of the timer. The timer is reactivated on completion of the main char-
ging process.
During travel, the EVS detects (via the cable from the switched contact no. 10
at the coupling plug) whether voltage is applied, and therefore whether the
generator is running. If voltage is available, the voltage booster will provide an
output of 14.2 V to the supply battery, and the refrigerator output is enabled.
If, after switching off the engine of the towing vehicle, no more voltage is being
applied to contact 10, the voltage booster shuts down and the refrigerator is
turned off. This prevents the starter battery discharging through the supply
battery and the refrigerator. The starting capability of the starter battery is thus
conserved. If the coupling plug is disconnected from the towing vehicle, the
EVS design ensures that the plug contacts cannot conduct voltage from
the caravan battery.
Driving operation
Содержание EVS 34/12-DS/IU
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