Huawei USG6000E Series Hardware Manual page 603

HUAWEI USG6000E Series
Hardware Guide
●
A.1.4 Lightning Protection and Grounding
This section describes the lightning protection and grounding requirements. Ensure
that the equipment room meets the requirements because lightning is one of the
major factors that causes damage to the USG.
Table A-3
Table A-3 Lightning protection and grounding requirements
Item
Civil
construction of
the equipment
room
AC power
system (TN-S
power supply
recommended
)
Issue 08 (2022-04-20)
Save board packing materials, such as plastic boxes and ESD bags, for future
use.
lists the lightning protection and grounding requirements.
Requirement
The equipment room should be built of reinforced concrete.
The equipment room should be equipped with lightning
protection devices, such as a lightning arrester.
The lightning protection ground for the equipment room (the
grounding of the lightning arrester) should share the same
grounding conductor with the protection ground of the
equipment room.
A dedicated transformer should be used at a communications
station. Power cables that are connected to the
communications station should be buried with metal jackets or
insulated jackets passing through steel pipes. Both sides of the
metal jackets or steel pipes are connected to the nearest
ground bar. The length of the buried power cables should be
no less than 15 meters.
The three phase lines at the low-voltage side of the AC
transformer at the communications station should each be
installed with a closed zinc-oxide lightning arrester for
grounding. The enclosure of the transformer, AC zero wire of
the low-voltage side of the transformer, and the metal outer
protector of the power cable connected to the transformer
enclosure must be connected to the nearest grounding post.
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