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)

(interpolate linearly between 22.5V and 26V)

For typ. 25ms, output voltage stays above 20V,

(dynamic peak current), see Fig. 4-9.

Overload behavior

in power supply mode

in battery mode

not limited

Output short circuit current

in power supply mode

in battery mode

typ.

not limited

31A for 2 sec

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)

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)

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)

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

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

25A

20A

Output Current

0

150mV

A

B

A... 25°C

B... 60°C

5A

15A

180mV

V

Power

Supply

+

-

Voltage Loss

=

-

A

V

Load,

0-25A

UB20.241

Input

Output

Jan. 2015 / Rev. 2.0 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 +49 89 9278 0

Germany

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