Appendix A
Specifications
©
National Instruments Corporation
A-5
NI PS-15 Power Supply User Manual
Figure A-6.
Power Factor Vs. Output Load
Input Current Inrush Surge
An active inrush limitation circuit limits the input inrush current after input
voltage is applied. The charging current into EMI suppression capacitors is
disregarded in the first milliseconds after power up.
Figure A-7.
Input Inrush Current, Typical Behavior
Typical/
Maximum
AC 100 V
AC 120 V
AC 230 V
Inrush current
Maximum
Typical
10 A
peak
3 A
peak
10 A
peak
3 A
peak
10 A
peak
3 A
peak
–25 °C to +70 °C
–25 °C to +70 °C
Inrush energy
Typical
1 A
2
s
1 A
2
s
1 A
2
s
–25 °C to +70 °C
0.35
0.4
Output Current
0.45
0.5
0.55
0.6
0.65
Power Factor, Typ.
230 Vac
120 Vac
100 Vac
6 A
1
3
4
5
2.5
3.5
4.5
5.5
1.5
2
Input Current
Input Voltage
Output Voltage
A
A:
Input:
Output:
Ambient:
Upper curve:
Medium curve:
Lower curve:
Time scale:
Start-up delay = Inrush delay
230 Vac
24 V, 10 A
25 °C
Input current 10 A / DIV
Input voltage 500 V / DIV
Output voltage 20 V / DIV
100 ms / DIV