XT40.721, XT40.722

– X-Series

Jan. 2007 / Rev. 1.0 DS-XT40.72x-EN All parameters are specified at 72V 13.3A, 3x400Vac (XT40.721) or 3x480Vac (XT40.722),

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

www.pulspower.com Phone +49 89 9278 0

Germany

6/19

XT40.721

XT40.722

Hold-up Time

typ.

3.6ms

3.6ms

typ.

3.2ms

3.2ms

typ.

7.2ms

7.2ms

6.7A, resistive load

typ.

6.4ms

6.4ms

6.7A, constant power load

Hold-up Time

min.

2.9ms

2.9ms

min.

2.6ms

2.6ms

min.

5.8ms

5.8ms

6.7A, resistive load

min.

5.2ms

5.2ms

6.7A, 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

72V

36V

54V

42V

66V

48V

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 9.0

13.3A, constant power load, typ.

13.3A, resistive load, typ.

T

13.3A, constant power load, min.

13.3A, resistive load, min.

61.2V

11ms

9.5 10 10.5

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