Recommendations For Dc Power Supply - Huawei AP7052DN Hardware Installation And Maintenance Manual

AP7052DN&AP7152DN
Hardware Installation and Maintenance Guide
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Table 5-20 lists the specifications for the DC power supply.
Table 5-20 Specifications for the DC power supply
Item
DC power
capacity to
support the surge
current
Regulated
voltage precision
Overshoot
amplitude of
switch on/off
Peak noise
voltage
Dynamic
response

5.2.2.4 Recommendations for DC Power Supply

The following are recommendations for the DC power supply.
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Issue 01 (2017-12-29)
A small-scale enterprise can deploy an integrated power supply system in its equipment
room but must take measures to prevent corrosive gases released from batteries from
eroding circuit boards of telecommunications equipment.
Requirements
Greater than 1.5 times the rated current
If the AC input voltage is in the range of 85% to 110% of the rated
value, and the load current is in the range of 5% to 100% of the rated
value, the output voltage of the rectifier ranges from -46.0 V to -56.4 V,
with the regulated voltage precision less than or equal to 1%.
Integral value of the DC output voltage ± 5%
≤200 mV
The recovery time is less than 200 ms. The overshoot is in the range of
the integral value of the DC output voltage ± 5%.
Use distributed power supply mode. Use multiple DC power supply systems and put
power equipment in multiple locations.
Adopt a standard DC power supply system, and set the output voltage to the
communications equipment within the required range.
Improve reliability of the AC power supply system to reduce the necessary capacity of
storage batteries. For small offices, increase the capacity of storage batteries if it is
difficult to enhance reliability of the AC power supply system.
The total capacity of the high-frequency switching rectifier must satisfy the power of the
communication loading and battery charging. If there are 10 or fewer active rectifier
modules, configure one backup module. If there are more than 10 active modules,
configure one backup module for every 10 active modules.
Install storage batteries in two or more groups. The capacity is determined by the
duration for which the storage batteries must supply power. For most offices, the
batteries should be able to supply power for at least one hour.
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