What's Grounding Requirements for Power Supplies

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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.

Other related questions:
What's Grounding Requirements for the Server
The server and supporting equipment (such as mobile base stations, switches, and power supplies) in the TR should be grounded. The PGND cables of the equipment in the communication office should be finally connected to the total ground bar. PGND cables of the equipment in a line should be connected to the ground bar of the first cabinet. PGND cables of the equipment not in a line but in the same TR should be connected to the protection ground bar of the TR. The -48 V power cable that is led out from the -48 V power input terminal of the server should be connected to the -48 V bus bar of the power cabinet or power distribution cabinet that is provided and used by the customer. Similarly, the RTN cable that is led out from the RTN power input terminal should be connected to the RTN bus bar. The PGND cable that is led out from the total ground terminal of the server should be connected to the nearest protection ground bar that is provided and used by the customer. NOTE: If the server is powered by a power distribution cabinet, the PGND cable that is led out from the total ground terminal of the cabinet should be connected to the protection ground bar of the power distribution cabinet. If the server is powered by a power cabinet, the PGND cable that is led out from the total ground terminal of the cabinet should be connected to the nearest protection ground bar of the power cabinet or that of the TR.

Power supply requirements of the OSN 8800 subracks
Standard operating voltage: �?8 V to �?0 V DC Operating voltage range: �?8 V DC: �?0 V to �?7.6 V �?0 V DC: �?8 V to �?2 V Rated current (�?8 V): OSN 8800 T64 subrack: 200 A (area-specific power supply, with 50 A current for each area) OSN 8800 T32 subrack: 100 A (area-specific power supply, with 50 A current for each area) OSN 8800 T16: 50 A OSN 8800 platform subrack: 25 A OSN 8800 universal platform subrack: 50 A

Power supply requirements for OSN 9800 U16 subracks
Each U16 subrack requires 4 x 63 A power supplies.

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