Emi; Grounding; Power Supply; Unpacking And Inspecting The Router - H3C CR19000-20 Installation Manual

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Employ a professional company to monitor and control harmful gases in the equipment room
regularly.

EMI

All electromagnetic interference (EMI) sources, from outside or inside of the router and application
system, adversely affect the router in the following ways:
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A conduction pattern of capacitance coupling.
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Inductance coupling.
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Electromagnetic wave radiation.
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Common impedance (including the grounding system) coupling.
To prevent EMI, use the following guidelines:
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Take effective measures to filter interference from the power grid.
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Separate the working earthing system of the router from the grounding facility and lightning
protection facility of the other electrical devices as far as possible.
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Keep the router far away from radio transmitting stations, radar stations, and high-frequency
devices.
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Use electromagnetic shielding, for example, shielded interface cables, when necessary.

Grounding

Correctly grounding the router is crucial to lightning protection, anti-interference, and ESD
prevention. Use a good grounding system for the router. Make sure the resistance between the
chassis and the ground is less than 1 ohm.

Power supply

A good power supply system is essential for correct operation of the router. The router supports AC,
DC, and high-voltage DC power inputs. Make sure the equipment room meets the following
requirements for the power supply systems.
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The AC power supply system is stable and reliable and capable of providing power required by
the router. As a best practice, use two power lines for the AC power supply system. If only one
power line is available in the equipment room, prepare a diesel generator as a backup power
source.
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The DC power supply system is stable and reliable and its output voltage is stable and within
the acceptable range allowed by the device.
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Enough batteries are available to ensure uninterrupted device operation in the event of a power
failure.

Unpacking and inspecting the router

Unpacking and inspecting the chassis

Pre-unpacking inspection
IMPORTANT:
Before unpacking the router, finish basic pre-unpacking inspection.
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