What's Grounding Requirements for Power Supplies

The protection grounding for the power supply should share the same grounding body set as the protection grounding for communication equipment.

The power supply should share the same protection ground bar as the equipment in the same TR.

The -48 V DC output positive terminal of the power supply must be connected to the nearest ground terminal.

If only one protection ground bar is provided in the TR, the PGND cable and working ground cable of the power supply must be connected to this ground bar.

If two ground bars are provided in the TR, namely, a protection ground bar and a working ground bar, then the PGND cable and working ground cable of the power supply must be connected to the corresponding ground bar. The protection ground bar and working ground bar must share one grounding body set.

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