XT40.241, XT40.242

– X-Series

Jan. 2007 / Rev. 1.0 DS-XT40.24x-EN All parameters are specified at 24V 40A, 3x400Vac (XT40.241) or 3x480Vac (XT40.242),

25°C ambient and after a 5 minutes run-in time unless otherwise noted.

www.pulspower.com Phone +49 89 9278 0

Germany

6/20

XT40.241

XT40.242

Hold-up Time

typ.

2.0ms

2.0ms

typ.

1.8ms

1.8ms

typ.

4.0ms

4.0ms

20A, resistive load

typ.

3.6ms

3.6ms

20A, constant power load

Hold-up Time

min.

1.6ms

1.6ms

min.

1.45ms

1.45ms

min.

3.2ms

3.2ms

20A, resistive load

min.

2.9ms

2.9ms

20A, constant power load

Fig. 8-1 Hold-up time, definitions

The energy is stored in the output capacitor. As

soon as the input is turned off, the output

capacitor will be discharged and the voltage will

lighter the load, the longer the hold-up time. Half

the load means twice the hold-up time.

The

hold-up

time

depends

on

the

load

characteristic. The curves below show the hold-up

time for a load with a resistive and a constant

power characteristic.

The hold-up time is defined as the period of time

when the input is turned off and until the output

defined in the IEC61131-2 as the lower limit for the

supplying voltage.

-15%

Hold-

up

Time

Zero Transition

Output

Voltage

Intput

Voltage

Fig. 8-2 Hold-up time vs. input voltage

24V

12V

18V

14V

22V

16V

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5

5.5 6.0 6.5 7.0 7.5 8.0

5.0

8.5 9.0ms

40A, constant power load, typ.

40A, resistive load, typ.

T

40A, constant power load, min.

40A, resistive load, min.

20.4V

Note: At no load, the hold-up time can be up to one minute. The green DC-ok LED is on during this time.