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15.6 Temperature compensation
Thanks to a battery voltage compensation system, the load characteristics can be maintained within the
specifications limits provided by the battery manufacturer, thus under the all range of temperature use.
The temperature is measured by sensors placed as close as possible to the battery.
Voltage values versus temperature values are:
T (°C)
Battery Voltage (V) 28.27 28.27 28.27 27.74 27.38 27.20 26.98 26.66 26.40 26.17
15.7 Battery capacity
Charger voltage (V)
Charger current (A)
Maximum battery charging current (A)
Minimum capacity (Ah) – 1.75V
Maximum capacity (Ah) – 1.75V
15.8 Specified values of I
I
is the maximum specified output current that can be supplied continuously while charging the battery.
max a
The standard EN12101-10 §6.2.2 stipulates that "after the end of the maximum backup duration at the maximum
rest current I
max a
voltage staying within the voltage range specified by the manufacturer", and specifies the maximum required
backup durations. For this reason, the specified values for I
with.
The specified values of Imax a are shown in the next tables:
Supply 2A
Specified I
EN54-4
Supply 3A
Specified I
EN54-4
In order to determine the suitable power supply and batteries, please refer to our web site.
-20
-10
0
according to EN12101-10 and EN54-4
max a
, the battery must be able to provide the maximum short time current I
max a
7Ah
1,61 A
4h
1,05 A
30h
0,11 A
72h
0,02 A
max a
7Ah
2,61 A
4h
0,87 A
30h
0,08 A
72h
0,01 A
10
20
25
30
24
24
2
1,5
2,25
7
26
38
may vary according to the standard to comply
max a
Battery capacity
12Ah
17Ah
1,36 A
1,11 A
1,36 A
0,25 A
0,41 A
0,08 A
0,15 A
Battery capacity
12Ah
17Ah
2,36 A
2,11 A
1,92 A
2,11 A
0,22 A
0,37 A
0,07 A
0,13 A
19
40
50
60
3
7
max b
24Ah
26Ah
0,76 A
0,66 A
0,06 A
0,63 A
0,66 A
0,24 A
0,26 A
24Ah
26Ah
1,76 A
1,66 A
1,06 A
0,58 A
0,64 A
0,22 A
0,25 A
within 180s, the output
38Ah
38Ah
1,02 A
0,40 A
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