Huawei NE05E Hardware Manual page 399

HUAWEI NE05E,NE08E
Hardware Guide
Item
On routing of the signal cable
Lightning-proof requirements of
outdoor cables
On the grounding bus line
On the grounding lead-in wire
Power Supply
This section describes the DC power supply system.
The working power voltage for the equipment ranges from -38.4 V to -72 V. The
transmission equipment offers a transmission path for communication networks,
so its interruption will have a wide influence. Therefore, the DC power distribution
system should be protected against power failure and configured with storage
batteries. To deal with a long-term power outage, a diesel generator should be
equipped as the standby AC power supply for the backbone transmission
Issue 05 (2023-03-31) Copyright © Huawei Technologies Co., Ltd.
4 Hardware Installation and Parts Replacement
Description
Signal cables should be led into the
communication office from
underground. Aerial routing of signal
cables is forbidden. The leadin or
leadout communication cable should
be metal-jacketed. Otherwise, they
should be routed in metal pipes. The
ground cable of the arrester should be
as short as possible. The empty pairs
in the cable should be connected to
the protection ground in the
equipment room.
When the equipment is installed in an
outdoor cabinet, the cables connected
to the equipment may be exposed
outdoors. If the length of the exposed
cables exceeds 5 m, a signal lightning
protector must be installed on the
equipment.
The general grounding bus line can be
grounding loop or bar. The ground
cable should be not of aluminum
material. If interconnection occurs
between different metal connectors,
take measures to avoid by electric
chemical corrosion. Generally, the
cross-sectional area is a copper bar of
no less than 120 mm
flat steel of the same resistance. The
grounding bus line should be kept
insulated from the construction steel.
The grounding lead-in should be no
longer than 30 meter. As for the
material, it is recommended to use
zinc plated flat steel with the cross-
sectional area being 40 mm x 4 mm or
50 mm x 5 mm.
2
or zinc-plated
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