Data Sheet

UB20.241
UB-Series
24V, 20A, DC-UPS
Output current
in power supply mode
in battery mode
nom.
nom.
nom.
nom.
typ.
25A
30A
20A at 22.5V,
18A at 26V
30A at 22.5V,
26A at 26V
80A
Continuously allowed
For max. 5s
Continuously allowed see
Fig. 4-7
(interpolate linearly between 22.5V and 26V)
For typ. 4s (BonusPower
® 4)
) see Fig. 4-7
(interpolate linearly between 22.5V and 26V)
For typ. 25ms, output voltage stays above 20V,
(dynamic peak current), see Fig. 4-9.
Description see footnotes
1)
and
2)
Description see footnote
3)
Overload behavior
in power supply mode
in battery mode
not limited
Hiccup
PLUS
Mode
Output short circuit current
in power supply mode
in battery mode typ.
not limited
31A for 2 sec
Description see footnotes
1)
and
2)
50mOhm impedance, repetitive pulses, see Fig. 4-8.
Return current typ. -200µA Leakage current to the input of the DC-UPS in battery
mode
Allowed voltage between input
and earth (chassis)
max. 60Vdc or
42.4Vac
continuous, IEC 62103
Capacitive and inductive loads No limitation
1) Use a 25A melting fuse with a melting I
2
t of 400A
2
s – 1500A
2
s or a 25A circuit breaker with tripping characteristic B, C, D or K on the input
of the DC-UPS if the current of the power supply is higher than 28A.
2) The DC-UPS has no current limiting feature included in power supply mode. The current is limited by the supplying power supply or the
fuse/ circuit breaker, which must be installed when the power supply has a continuous output current capability of more than 28A.
3) Hiccup
PLUS
Mode:
In battery mode, the DC-UPS can deliver 50% more output current for a period of up to 4s before it reduces the output current
automatically to the nominal output current. If the current requirement is continuously higher than the nominal current, the current
regulation of the DC-UPS reduces the output voltage. As soon as the output voltage falls below 18V, the output switches off and makes a
restart attempt every 17s. This cycle is repeated as long as the overload exists.
4) BonusPower
®
:
The DC-UPS is designed to support loads with a higher short-term power requirement without damage or shutdown. In battery mode,
the short-term duration is hardware controlled by an output power manager. At 150% output current, it is typically 4s and longer for
lower currents. Once the BonusPower® time is exceeded, the maximum output current is automatically reduced to the nominal output
current or the DC-UPS goes into the Hiccup
PLUS
mode.
Fig. 4-4 Input to output voltage loss
Fig. 4-5 Input to output voltage loss
measurement setup
Input to Output Voltage Loss, typ.
0mV
10A
30mV
60mV
90mV
120mV
25
A
20A
Output Current
0
150mV
AB
A
.
.
.
2
5
°
C
B
.
.
.
6
0
°
C
5A 15A
180mV
V
Power
Supply
+
-
U
IN
Voltage Loss U IN = U OUT -
A
V
I OUT
U OUT
Variable
Load,
0-25A
UB20.241
Input Output
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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