Data Sheet

UB20.241
UB-Series
24V, 20A, DC-UPS
6. BUFFER TIME
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.
The following times are typical values for a new product and the aging effect during operation is not included.
Pay attention:
- The following buffer times apply for a battery temperature between 20°C and 30°C and a buffer voltage setting of
22.5V. At higher voltages, the buffer time is correspondingly shorter. Furthermore, with a wire length of 2x1m
(equal 1m cord length) and a cross section of 4mm
2
(or AWG 12) between the battery module and the DC-UPS.
- Due to long-term aging effects of batteries consider a buffer time reduction of 30-50% over time.
- The shown buffer times only apply for PULS battery modules or from PULS recommended batteries.
- The buffer time is defined for a fully charged battery. The buffer time can be 10-20% shorter for buffer events,
which start immediately after the “Ready” signal becomes active.
Battery size
7Ah
(UZK24.071)
12Ah
(UZK24.121)
26Ah
At 22.5V, 0A
Buffer time typ. 1d : 17h : 40m : 0s 2d : 22h : 50m : 0s 6d : 19h : 53m : 20s
At 22.5V, 0.2A
typ. 17h : 13m : 20s 1d : 6h : 41m : 40s 2d : 20h : 03m : 20s
At 22.5V, 1A
typ. 5h : 16m : 40s 9h : 51m : 40s 21h : 43m : 20s
At 22.5V, 2A
typ. 2h : 32m : 0s 5h : 17m : 59s 11h : 27m : 30s
At 22.5V, 5A
typ. 46m : 30s 2h : 2m : 55s 4h : 26m : 40s
At 22.5V, 10A
typ. 19m : 11s 46m : 2s 2h : 10m : 0s
At 22.5V, 15A
typ. 10m : 35s 27m : 34s 1h : 17m : 40s
At 22.5V, 20A
typ. 06m : 45s 16m : 47s 55m : 00s
typ. 4s 4s 4s
At 22.5V, 30A
Battery size 65Ah 100Ah 140Ah
At 22.5V, 0A
Buffer time typ. 16d : 10h : 26m : 40s 24d : 7h : 20m : 0s 34d : 17h : 20m : 0s
At 22.5V, 0.2A
typ. 7d : 0h : 3m : 20s 10d : 17h : 05m : 0s 14d : 11h : 13m : 20s
At 22.5V, 1A
typ. 2d : 4h : 21m : 40s 3d : 11h : 20m : 0s 4d : 21h : 21m : 40s
At 22.5V, 2A
typ. 1d : 6h : 8m : 20s 1d : 22h : 30m : 0s 2d : 17h : 6m : 40s
At 22.5V, 5A
typ. 11h : 56m : 40s 18h : 30m : 40s 1d : 1h : 55m : 0s
At 22.5V, 10A
typ. 5h : 50m : 15s 9h : 11m : 40s 12h : 52m : 36s
At 22.5V, 15A
typ. 3h : 49m : 17s 6h : 3m : 0s 8h : 27m : 44s
At 22.5V, 20A
typ. 2h : 49m : 29s 4h : 31m : 0s 6h : 19m : 29s
typ. 4s 4s 4s
At 22.5V, 30A
Fig. 6-1 Buffer time definition
Battery
Charge
100%
80-90%
"Ready" signal threshold
t
t
Battery
Mode
Buffer Time
Feb. 2016 / Rev. 2.1 DS-UB20.241-EN
All parameters are specified at 24V, 20A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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