Huawei NE05E Hardware Manual page 396

HUAWEI NE05E,NE08E
Hardware Guide
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Surge Protection and Grounding Requirements
This section describes the requirements for surge protection and grounding.
Table 4-7
Table 4-7 Requirements for surge protection and grounding
Item
On structure of the equipment room
Use TN-S for AC power supply
Issue 05 (2023-03-31)
Use ESD tools such as ESD wrist straps, ESD tweezers and extraction tools
when dealing with the equipment.
Ground all conducting materials in the room, including computer terminals.
Use ESD worktables.
Keep non-ESD materials (such as common bags, foams, and rubbers) at least
30 cm away from boards and ESD-sensitive components.
shows the requirements for surge protection and grounding.
Copyright © Huawei Technologies Co., Ltd.
4 Hardware Installation and Parts Replacement
Description
Build the equipment room with steel
and concrete. The equipment room
should be equipped with facilities such
as surge protector to protect it against
direct lightning strokes. Make sure the
surge protection grounding of the
equipment room, or that of devices
such as the surge protector, shares the
same grounding body with the
protection grounding of the building
where the room is located in.
Equip the communication office with
special electric transformers and
metal-jacketed or insulation-jacketed
power cable. The power cable is to
pass through a steel pipe and buried in
the earth before entering the office.
Both ends of both the metal jacket
and the steel pipe should be grounded
by proximate. Make sure the buried
length is no less than 15 meters. Each
of the three live cables at the low-
voltage side of the AC transformer
should be equipped with a gapless zinc
oxide arrester respectively. The chassis,
the AC neutral cable of the low-
voltage side, and the metal jacket of
the cable connected to the chassis
should all proximately grounded.
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