Dell PowerVault MD3220 Series Manuel technique - Page 38

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Technical Guide Book for PowerVault MD3200MD3220

Table 9.

Power Supply Specifications

AC Characteristics

INPUT PARAMETER

Input Voltage Range

Input Frequency

Peak Inrush Current

Power Factor over full AC input range

Minimum Efficiency measured 20%, 50% and

80% output load over full range of AC input and

environmental conditions

Peak Output Power

Thermal management

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

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.

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 RAID controllers 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.

Requirement

90 – 264 VAC

47 – 63 Hz

55 A for 10ms or less, 25 A for 10-150ms

0.9 @ output load > 90%

Must Meet Climate Savers requirements:

Load Condition

Efficiency

20%

87%

50%

90%

100%

87%

600 Watts