Huawei 50082922, Руководство по установке и обслуживанию оборудования

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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 lists the voltage range of the AC power supply for the devices.
Table 5-14 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 -4% to +4% of the rated value
Voltage wave shape sine
distortion Within 5% of the rated voltage
The automated electric generator must have a standard interface that supports
telecommunication protocols, 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.
Recommendations for AC Power Supply
The following are recommendations for the AC power supply.
l If the voltage of the power mains that supply power directly to devices exceeds the rated
voltage by -10% to 5%, or exceeds the voltage range that devices can support, a voltage
regulating device or voltage stabilizing device is required.
l If the mains do not supply power for the device directly, or if the mains voltage exceeds
the rated voltage by -15% to 10% or exceeds the input voltage range of the DC power
supply, a voltage regulating device or voltage stabilizing device is required.
l A UPS or inverter power supply system is required to provide uninterrupted AC power
to support the telecommunication load.
l If abnormalities occur on the mains, telecommunication servers should be equipped with
a self-supplied electric generator to support the key telecommunication load. The
capacity should be not less than 150% to 200% of the total uninterruptible power supply.
l Storage batteries are usually installed in a parallel connection of two groups. UPS
storage batteries are generally installed in one group. The redundancy required for the
UPS can rely on concatenation or parallel connection. When an inverter or a UPS is
used, the active inverter is determined by the maximum power and a backup inverter is
required.
R250D-E
Hardware Installation and Maintenance Guide
5 Appendix
Issue 01 (2016-09-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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