Item Requirements
Peak noise
voltage
≤200 mV
Dynamic
response
The recovery time is less than 200 ms. The overshoot is in the range of
the integral value of the DC output voltage ±5%.
Recommendations for DC Power Supply
The following shows recommendations for the DC power supply.
l Use distributed power supply mode. Use multiple DC power supply systems and put power
equipment in multiple locations.
l Adopt a standard DC power supply system, and set the output voltage to the
communications equipment within the required range.
l 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.
l 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.
l 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.
5.3 Equipment Grounding Specifications
5.3.1 General Grounding Specifications
Table 5-16 shows the general grounding specifications.
Table 5-16 General grounding specifications
No. Description
1 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.
2 The cable trays, shells, metal ventilation pipes, metal doors and windows in the
equipment room should be grounded for protection.
3 The metal parts of the equipment which are electrically floating in normal conditions
should be grounded for protection.
Huawei AP3x10xN&5x10xN&5x30xN&6x10xN&7x10xN
Hardware Installation and Maintenance Guide 5 Appendix
Issue 11 (2015-05-18) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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