1.1 Changes in RRU3931E Installation Guide
This section describes the changes in
RRU3931E Hardware Description
.
Draft A (2016-03-30)
This is a draft.
1.2 Installation Preparations
This section describes the preparations for installation. Before starting the installation, you
must get the installation environment ready, obtain the required reference documents, tools,
and instruments, and familiarize yourself with the skills required.
1.2.1 Installation Environment
Before starting the installation, ensure that the power supply equipment, transmission
equipment, and related matching equipment are ready.
Precautions for Site Selection
l
Do not install a RRU3931E near an interference source, such as a broadcast and
television tower, high and low-voltage substation, high-voltage tower, high-power radio
transmitter, and radar station.
l
For the sake of surge protection, the mounting height of a RRU3931E should not be
greater than 10 m. Do not install a RRU3931E along a highway or railway or on the
mountain top, tower, standalone pole in a suburban area or open field, or standalone
rooftop in a non-urban area.
Requirements for the Upper-level Circuit Breaker
Slow-blow fuses of the gL (DIN VDE)/gG (IEC) class in accordance with IEC60269-1 are
recommended. Fuses of the same specifications must be configured for L and N wires for the
sake of O&M security.
Type C bipolar circuit breakers in accordance with IEC60934 are recommended. Circuit
breakers must be configured for L and N wires for the sake of O&M security.
Table 1-1
describes the recommended specifications.
Table 1-1
Requirements on the upper-level circuit breakers and power cables
Power Supply
Current of the Upper-
level AC Circuit
Breakers (or Fuses)
Cross-Sectional Area of
the Input Power Cable
220 V AC single-phase
l
Minimum value: 5 A
l
Recommended value: 16
A
1.5 mm
2
to 2.5 mm
2
110 V AC dual-live-wire
RRU3931E
Installation Guide
1 RRU3931E Installation Guide
Issue Draft A (2016-03-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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