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The upstream input terminal of the power supply system is equipped with a
surge protection device to protect the system against a minimal voltage surge
of 10/700 us, 5 kV and a minimal current surge of 8/20 us, 20 kA.
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All cables in the power distribution frame (PDF) comply with YD/T 1173
specifications, and the diameters of all power cables meet the requirements for
wire ampacity.
8.10.7 DC Power Supply
The DC power supply should be stable and reliable. The power equipment should
be deployed near the server. The standard DC voltage is -48 VDC with a fluctuation
range of server power between -40 V to –72 V.
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