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EVO STAR 60-800
49
15 BATTERIES
The system guarantees uninterruptible power by using buffer batteries directly connected to the AC/DC
conversion output. A periodical check of the Battery State will prevent unpleasant mishaps that may occur if there is a
power shortage, such as short autonomy or in extreme cases even non-intervention of the system with consequent load
loss. If storing battery cabinets batteries please remember to recharge them every four months (chapter 6.1.3.1), in
order to guarantee the best maintenance possible.
For transport safety the batteries inside the cabinet are disconnected in some points to discontinue circuit continuity,
therefore you must restore these connections when installing the batteries.
As already mentioned system autonomy depends on the type of battery used and, above all, on their capacity.
Battery capacity is expressed in ampere/hour, from this parameter you can work out system autonomy. This expresses
the amount of current delivered in a given time interval, discharging a storage battery at a given condition (discharge
current), until it reaches a set voltage. For example, a 50 Ah capacity can deliver 2,5 A for 20 hours. Excessively hot
temperatures, over 40°C, can drastically reduce battery life, due to plate corrosion caused by an increase of acid
aggressiveness. However, the system has a device, which can reduce working voltage according to the temperature, thus
improving battery life.
The discharge characteristic varies according to the make and model but it may be compared to the graph above.
The buffer system used is composed of a string of 32 batteries connected in series. The capacity of each single string
corresponds to the capacity of a battery, whereas for parallel series it results in the sum of all the strings. In this manner
it is possible to increase system autonomy.
Picture 24
