NCR S26 Table A-1 -Watt Power Supply Input Requirements, Input Nominal Frequency Variations

Input Requirements

Input Requirements

The following represent the input requirements of the 420-watt power supply:

∙Maximum waveform harmonic distortion shall be less than 5%. The power supply must operate above frequency with both 100~120/200~240 VRMS input voltage ranges.

∙The power supply must operate over both voltage ranges with an outside switch.

The table below shows the 420-watt power supply input requirements.

Table A-1. 420-Watt Power Supply Input Requirements

Input	Nominal Frequency	Frequency
Frequency		Variations
	50 Hz	47 Hz ~ 53 Hz
	60 Hz	57 Hz ~ 63 Hz
Input Voltage	Nominal Voltage	Variation Range
	100 ~ 120 VRMS	90 ~ 132 VRMS
	200 ~ 240 VRMS	180 ~ 264 VRMS
Input Current	Maximum Input Current	Measuring
		Range
	8 A	90 ~ 132 VRMS
	4 A	180 ~ 264 VRMS
Inrush Current	The power supply inrush current shall be less than the ratings of
	its critical components (including the fuse, rectifiers, and the
	surge-limiting device) for all conditions of line voltage.
Efficiency	63% minimum (measuring at maximum load, applying nominal
	line)

A-2 420-Watt Power Supply Requirements