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NE40E-M2 V800R010C10SPC500 Installation Guide

This is NE40E-M2 V800R010C10SPC500 Installation Guide
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Grounding Specifications for Power Supply Systems

Grounding Specifications for Power Supply Systems

This section describes the grounding specifications for power supply systems.

Table 5-3 lists the grounding specifications for power supply systems.

Table 5-3 Grounding specifications for power supply systems

No.

Description

1

The AC power supply system for an equipment room should use a TN-S power supply.

2

The inlet for an AC power cable to enter the equipment room should be equipped with a surge protection device (C-level) with a nominal discharging current no less than 20 kA.

3

The protection ground for the power supply and that for devices are connected to the same ground busbar. If the power supply and devices are located in the same equipment room, try to use the same protection ground bar for them.

4

A surge protection circuit should be added for an AC power interface.

5

The anode of the -48 V DC power supply or negative pole of the 24 V DC power supply should be grounded at the output point of the DC power supply.

6

The working ground and protection ground of the DC power supply must be connected to the same ground busbar as the protection ground of the devices. If the power supply and devices are located in the same equipment room, try to use the same protection ground bar for them.

7

A surge protection circuit should be added for a DC power interface.

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Updated: 2019-01-02

Document ID: EDOC1100058424

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