UBC10.241, UBC10.241-N1
U
–
Series
24V, 10A, DC-UPS
May. 2008 / Rev. 1.1 DS-UBC10.241-EN
All parameters are specified at an input voltage of 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time
unless otherwise noted. It is assumed that the input power source can deliver a sufficient output current.
www.pulspower.com Phone +49 89 9278 0 Germany
6/23
8.
B
ATTERY
The required 12V VRLA battery is included with this unit. For more details on battery requirements see chapter 26.
Battery
voltage
nom. DC 12V
Maintenance-free 12V VRLA lead acid battery.
Battery voltage range
9.0 – 15.0V
Continuously allowed, except deep discharge
protection
max. 35Vdc
Absolute maximum voltage with no damage to the
unit.
typ.
7.4V
Above this voltage level battery charging is possible
Allowed battery capacity
nom. 5Ah
High-current
version
Battery charging method
CC-CV
Constant current, constant voltage mode
Battery charging current
nom. 1.5A
CC-mode, Independent from battery size
max. 1.7A
Corresponding 24V input current see Fig. 8-2
End-of-charge-voltage
(CV-mode) typ.
13.1 - 14V
Automatic setting according to ambient temperature
Battery charging time
typ. 3h
*)
Battery discharging current **)
typ.
21A
Buffer mode, 10A output current, 11.5V on the battery
terminal of the DC-UPS, see Fig. 8-1 for other
parameters
typ.
0.3A
Buffer mode, 0A output current
max. 50
μ
A
At no input, buffering had switched off, all LEDs are
off
typ.
270mA
At no input, buffering had switched off, yellow LED
shows “buffer time expired” (max. 15 minutes)
Deep discharge protection ***)
typ.
10.5V
At 0A output current
typ.
9.0V
At 10A output current
*) The charging time depends on the duration and load current of the last buffer event. The numbers in the table represent a
fully discharged battery. A typical figure for a buffer current of 10A is 2h 20Min. for a 5Ah highcurrent battery. Above 40°C
charging time can be longer.
**) The current between the battery and the DC-UPS is more than twice the output current. This is caused by boosting the 12V
battery voltage to a 24V level.
***) To ensure longest battery lifetime, the DC-UPS has a battery deep discharge protection feature included. The DC-UPS stops
buffering when the voltage on the battery terminals of the DC-UPS falls below a certain value.
Fig. 8-1
Battery discharging current
vs. output current, typ.
Fig. 8-2
Required input current vs. input
voltage for battery charging
Battery Current
0
0
10
20
5
15
25
30A
2.5
7.5
10
15A
12.5
5
Output Current
Voltage on
battery terminal
of the DC-UPS:
A:
10.5V
B:
11V
C:
12V
A B
C
Input Current
0
23
0.5
1.0
0.25
0.75
1.25
1.5A
Input Voltage
24
25
26
28V
max. (battery charging
current 1.7A)
27
typ. (battery charging c
urrent 1.5A)
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