Electromagnetic Protection - Huawei USG6000 Series Hardware Manual

HUAWEI USG6000 Series
Hardware Guide
Item
Surge current tolerance
capability in DC power
supply
Regulated voltage precision
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.3.6 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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Issue 08 (2017-06-30)
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
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Specifications
At least 1.5 times higher than load rated current capability
The regulated voltage precision is less than or equal to 1%
when the AC input voltage fluctuates between 85% and
110% of the rated voltage, the load current varies between
5% and 100% of the rated current, and the output voltage
of the rectifier is any fixed value in the -46.0 V to -56.4 V
range.
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
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