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Huawei AP3x10xN&5x10xN&5x30xN&6x10xN&7x10xN
Hardware Installation and Maintenance Guide
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/220 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.
Table 5-14
Table 5-14 Voltage range of AC power supply
Item
AC power capacity to support
the devices
AC power capacity to support
the power modules and
important buildings
Frequency of alternating
current
Voltage wave shape sine
distortion
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
l
Recommendations for AC Power Supply
The following shows recommendations for the AC power supply.
Issue 11 (2015-05-18)
shows the voltage range of the AC power supply for the devices.
AC neutral should have a conductor with the same cross section as the phase line.
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 Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Requirements
-10% to +5% of the rated voltage
-15% to +10% of the rated voltage
-4% to +4% of the rated value
Within 5% of the rated voltage
5 Appendix
89
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