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1. Purpose

This specification defines the performance characteristics and functions of a 500 watts redundant power
supply with Active PFC (Power Factor Correction) and hot swappable capabilities.

2. AC Input Requirements

2.1 Input

Voltage

and

Frequency

Voltage (sinusoidal) : 100~240 VAC full range, with 10% tolerance. Input frequency ranges from
47hz~63hz

2.2 AC Input Current and Inrush Current

AC line inrush current shall not damage any component nor cause the AC line fuse to blow under any
DC conditions and with any specified AC line input voltage and frequency. Repetitive On/Off cycling of
the AC input voltage shall not damage the power supply.

Table 1: AC Input Current and Inrush Current

Input

Voltage

Input Current

Maximum

Inrush Current

100~240Vac 10%

7A ~3.5A

50Apeak@115VAC

2.3 Input Power Factor Correction (Active PFC)

The power factor at 100% of rated load shall be

≥ 0.95 at nominal input voltage.

2.4 AC Line Transient Specification

AC line transient conditions are characterized as “sag” and “surge” conditions. Sag conditions (also referred
to as “brownout” conditions) will be defined as the AC line voltage dropping below nominal voltage. Surge
conditions will be defined as the AC line voltage rising above nominal voltage. The power supply shall meet
the regulation requirements under the following AC line sage and surge conditions.

Table 2: AC Line Sag Transient Performance

Duration Sag

Operating

Voltage Line

Frequency

Load Performance

Criteria

Continuous

10%

Nominal AC Input ranges

50/60 Hz

100%

No loss of function or

performance

0-1 AC cycle

100%

Nominal AC Input ranges

50/60 Hz

80%

No loss of function or

performance

> 1 AC cycle

> 10%

Nominal AC Input ranges

50/60 Hz

100%

Loss of function Acceptable

Table 3: AC Line Surge Transient Performance