UB40.241
UB-Series
24V,
40A,
DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
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7.
B
UFFER
T
IME
Buffering will start immediately without interruption after the input voltage falls below typically 22.2V. Buffering is possible even if the
batteries are not fully charged.
Buffering can not be started without having previously reached typically 23.0V.
The buffer time (sometimes also called autonomy time) is the maximum period of time for which the battery can maintain the required
output current. The buffer time mainly depends on the capacity and quality of the battery and the output current in battery mode.
Too many buffering events in too short of a time can lead to a 5 second lock for further buffering requests. For example, if there are
multiple 0.2s buffer requests over a duration of 3.3s or multiple 0.3s buffer requests over a duration of 9.2s or multiple 0.4s buffer
requests over a duration of 14s, further buffering requests can be blocked for 5 seconds. Multiple buffer events longer than 0.5s do not
lead to such a 5s lock for further buffering events.
The following times are typical values for a new product in combination with PULS battery modules or with batteries recommended
from PULS. Due to long-term aging effects of batteries consider a buffer time reduction of 30-50% over time. The values apply for a
battery temperature between 20°C and 30°C.
The buffer times are defined for fully charged batteries and can be 10-20% shorter for buffer events, which start immediately after the
“Ready” signal becomes active.
The buffer times apply for a wiring with a wire length of 2x0.5m (equal 0.5m cord length) and a cross section of 6mm
2
(or AWG 10)
between the battery module and the DC-UPS.
Battery size
12Ah
(UZK24.122)
26Ah
(UZK24.262)
38Ah
Buffer time
Typ.
13 days
30 days
43 days
At 0A load
Typ.
1d : 0h : 4m : 27s
2d : 5h : 14m : 27s
3d : 9h : 1m : 7s
At 0.5A load
Typ.
11h : 20m : 33s
1d : 1h : 27m : 47s
1d : 11h : 18m : 3s
At 1A load
Typ.
5h : 29m : 52s
12h : 9m : 10s
19h : 5m : 50s
At 2A load
Typ.
2h : 0m : 35s
4h : 44m : 43s
7h : 24m : 27s
At 5A load
Typ.
47m : 35s
2h : 17m : 27s
3h : 28m : 20s
At 10A load
Typ.
27m : 29s
1h : 21m : 7s
2h : 8m : 8s
At 15A load
Typ.
18m : 17s
55m : 46s
1h : 31m : 33s
At 20A load
Typ.
13m : 40s
40m : 52s
1h : 8m : 27s
At 25A load
Typ.
10m : 47s
31m : 34s
53m : 58s
At 30A load
Typ.
8m : 49s
25m : 17s
44m : 9s
At 35A load
Typ.
7m : 25s
21m : 1s
36m : 21s
At 40A load
Typ.
-
15m : 12s
26m : 53s
At 50A load
Battery size
65Ah
100Ah
200Ah
Buffer time
Typ.
77 days
115 days
240 days
At 0A load
Typ.
6d : 1h : 50m : 0s
9d : 3h : 54m : 27s
19d : 16h : 13m : 20s
At 0.5A load
Typ.
2d : 23h : 45m : 33s
4d : 12h : 13m : 3s
9d : 18h : 22m : 30s
At 1A load
Typ.
1d : 9h : 13m : 35s
2d : 5h : 14m : 27s
4d : 20h : 19m : 10s
At 2A load
Typ.
13h : 53m : 20s
20h : 50m : 0s
1d : 21h : 50m : 0s
At 5A load
Typ.
6h : 49m : 43s
10h : 7m : 38s
22h : 27m : 13s
At 10A load
Typ.
4h : 23m : 53s
6h : 33m : 31s
14h : 44m : 16s
At 15A load
Typ.
3h : 4m : 30s
4h : 48m : 12s
10h : 52m : 47s
At 20A load
Typ.
2h : 17m : 58s
3h : 40m : 26s
8h : 33m : 53s
At 25A load
Typ.
1h : 48m : 47s
2h : 53m : 49s
7h : 1m : 18s
At 30A load
Typ.
1h : 28m : 59s
2h : 22m : 11s
5h : 51m : 22s
At 35A load
Typ.
1h : 14m : 45s
1h : 59m : 28s
4h : 55m : 15s
At 40A load
Typ.
55m : 53s
1h : 29m : 18s
3h : 24m : 3s
At 50A load
