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** Available in Q3 2010 21

Table 12. Power Supply Specifications

AC Characteristics

INPUT PARAMETER

Requirement

Input Voltage Range

90 – 264 VAC

Input Frequency

47 – 63 Hz

Peak Inrush Current

55 A for 10ms or less, 25 A for 10-

150ms

Power Factor over full AC input range

0.9 @ output load > 90%

Minimum Efficiency measured 20%, 50%

and 80% output load over full range of AC

input and environmental conditions

Must Meet Climate Savers requirements:

Load Condition

20% 87%

Efficiency

50% 90%

100% 87%

Peak Output Power

600 Watts

6.1.1 Thermal management

The cooling system for the enclosure is designed to allow all components (power supplies,

EMMs, HDDs, SSDs etc.) to meet their full operating specifications. There may be up to four

fans in each power supply/fan module. This configuration provides N+1 fan redundancy,

meaning that the enclosure can be sufficiently cooled for normal operation even if one fan fails.

Firmware shall continuously monitor the temperature sensors within the enclosure and take

proper actions to throttle the fans in order to maintain optimal operating temperature.

6.1.2 Over-Temperature Shutdown

In order to prevent potential damage to the drives and subsequent loss of data, the power

supply has the capability to shut itself down or be shut down by the EMM, through embedded

firmware or host management software such as Dell™ Open Manage Storage Management, in

the event of an over-temperature condition. When the power supply incorporates its internal

thermal shutdown feature, it will automatically restart when the over temperature condition no

longer exists. Hysteresis of at least 5 degrees is employed to prevent a frequent toggling on

and off of the outputs.

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Dell H800 Specifiche Pagina 21