B.2 Requirements for Power Supply
This section describes the requirements for power supply conditions.
B.2.1 Requirements for AC Power Supply
The AC power supply consists of power mains, uninterruptable power supply (UPS), and self-
supplied electric generator. In addition to meeting the requirements of the server load, the AC
power supply must have a simple connection line, safe operation, flexible scheduling, and easy
maintenance.
The low-voltage power supply should have 3-phase, 5-wire mode or monophase 3-wire mode.
This AC power supply should be 110 V/127 V/220 V/380 V, and the frequency is 50 Hz.
The UPS should supply the same power and operate at the same phase as the power mains. The
switching time between the UPS and mains should be less than 10 ms; otherwise, the networking
devices will reboot or reset.
For power distribution capacity in the equipment room, both the working current and fault current
of the devices should be considered. Ensure that independent AC power supplies protect
independent devices. Configure the current-carrying capacity of the protection switch of the
equipment room for more than that of the devices.
shows the voltage range of the AC power supply for the devices.
Table B-6
Voltage range of AC power supply
Item
Requirements
AC power capacity to support
the devices
-10% to +5% of the rated voltage
AC power capacity to support
the power modules and
important buildings
-15% to +10% of the rated voltage
Frequency of alternating
current
-15% to +10% of the rated voltage
Voltage wave shape sine
distortion
Within 5% of the rated voltage
The automated electric generator must have a standard interface that supports
telecommunication protocol, remote telecommunication, monitoring, and control.
AC power cables should meet the following specifications:
l
AC neutral should have a conductor with the same cross section as the phase line.
l
AC cables should have non-flammable insulation. The layout of AC cables should comply
with local regulations. Low-voltage power distribution rooms should comply with local
regulations.
HUAWEI NetEngine80E Router
Installation Guide
B Environmental Requirements for Device Operation
Issue 02 (2011-09-10)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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