Huawei USG6000E Series Hardware Manual page 608

HUAWEI USG6000E Series
Hardware Guide
Item
On/Off overshoot
magnitude
Peak-to-peak noise
voltage
Dynamic response
The following are suggestions for the basic DC power supply system:
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A.1.6 Electromagnetic Protection
This section describes the electromagnetic protection requirements. Check that the
equipment room meets these requirements so as to ensure the normal running of
the USG.
Possible interference sources are as follows:
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To reduce as much interference as possible, complete the following steps:
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Issue 08 (2022-04-20)
Decentralized power supply is recommended. Use multiple DC power supply
systems and multiple power sources.
Use a standard-compliant DC power supply. The output voltage of the
communications power supply must be in the voltage range of the device to
be powered.
Improve the reliability of the AC power supply system to properly reduce the
battery capacity. When it is difficult to improve the reliability of the AC power
supply system at a small communications station, properly increase the
battery capacity.
The total capacity configuration of the high-frequency switch rectifier should
match the communications load power and battery charging power. Rectifier
modules should use a redundancy configuration. If the number of active
modules is less than or equal to 10, one standby module should be deployed.
If the number of active modules is greater than 10, one standby module
should be deployed for every 10 active modules.
Storage batteries should be installed in two or multiple sets. The total
capacity depends on the duration in which the storage battery sets
independently supply power to the load. For most communications stations,
storage battery sets should supply power for at least one hour.
Capacitive coupling
Inductance coupling
Electromagnetic radiation
Common impedance (including the PGND system) coupling
Take effective measures to avoid possible power grid interference to the
power supply system.
Copyright © Huawei Technologies Co., Ltd.
Specifications
Within the 95% to 105% range of the DC rated
voltage value
Less than or equal to 200 mV
The recovery time should be less than 200 ms, and
the overshoot must be within the 95% to 105%
range of the DC voltage set value.
A Appendix
601