Power Supply
Current of the Upper-
level AC Circuit
Breakers (or Fuses)
Cross-Sectional Area of
the Input Power Cable
110 V AC single-phase
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Maximum value: 20 A
NOTE
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The requirements provided in the preceding table are based on the peak power of a RRU3931E and
do not represent power consumption when the RRU3931E is running.
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Minimum value: Ensures that a RRU3931E can work normally under normal circumstances.
However, lightning strikes or abnormal voltage fluctuations may trip the circuit breaker or melt the
fuse.
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Recommended value: Ensures that a RRU3931E can work normally under normal circumstances
and that the circuit breaker does not trip in the event of lightning strikes or abnormal voltage
fluctuations.
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Maximum value: Indicates the maximum rated current allowed in the product design.
Requirements for Surge Protection and Grounding
Huawei by default uses a three-core power cable to connect a RRU3931E and external power
supply equipment. The power supply side must ensure that the PE wire of the three-core
power cable can be properly grounded. In outdoor installation scenarios or outdoor cabling
scenarios, PGND cables must be used to guarantee the surge protection and grounding for the
ground terminals of the mounting kits.
Requirements for power supply
During installation, power off the RRU3931E.
1.2.2 Reference Documents
This section describes reference documents required for installation.
Before starting the installation, you must be familiar with the following reference documents:
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Safety Information
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RRU3931E Hardware Description
1.2.3 Tools and Instruments
Before starting the installation, prepare the following tools and instruments.
Marker (diameter ≤ 10 mm)
Hammer drill (Ø12 bore)
Rubber mallet
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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