Equipment Grounding Specifications; General Grounding Specifications - Huawei AP4030DN Hardware Installation And Maintenance Manual

Huawei AP4030DN
Hardware Installation and Maintenance Guide
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Recommendations for DC Power Supply
The following shows recommendations for the DC power supply.
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5.3 Equipment Grounding Specifications

5.3.1 General Grounding Specifications

Table 5-16
Table 5-16 General grounding specifications
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Issue 02 (2015-05-18)
Requirements
The recovery time is less than 200 ms. The overshoot is in the range of
the integral value of the DC output voltage ± 5%.
Use distributed power supply mode. Use multiple DC power supply systems and put
power equipment in multiple locations.
Adopt a standard DC power supply system, and set the output voltage to the
communications equipment within the required range.
Improving the reliability of the AC power supply system reduces the necessary capacity
of storage batteries. For small offices, increase the capacity of storage batteries if it is
difficult to enhance the reliability of the AC power supply system.
The total capacity of the high-frequency switching rectifier must satisfy the power of the
communication loading and battery charging. If there are 10 or fewer active rectifier
modules, configure one backup module. If there are more than 10 active modules,
configure one backup module for every 10 active modules.
Install storage batteries in two or more groups. The capacity is determined by the
duration for which the storage batteries must supply power. For most offices, the
batteries should be able to supply power for at least one hour.
shows the general grounding specifications.
Description
The working grounding and protection grounding, including the shielded
grounding and the lightning-proof grounding of the cable distribution frame should
share the same grounding conductor.
The cable trays, shells, metal ventilation pipes, metal doors and windows in the
equipment room should be grounded for protection.
The metal parts of the equipment which are electrically floating in normal
conditions should be grounded for protection.
The ground cable must be connected securely to the protection ground bar of the
equipment room.
Do not use other equipment as part of the ground cable or electrical connection.
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