Lightning Protection; Checking The Rack; Safety Precautions - H3C AR 46-20 Installation Manual

H3C AR 46 Series Routers Installation Manual
inductance coupling, electromagnetic wave radiation, and common impedance
(including grounding system) coupling. To prevent the interference, do the following:
Take effective measures against interference from the power grid.
Use an earthing system or lightning protection grounding different from that for the
power supply equipment and keep them as far as possible.
Keep the router far away from strong power wireless launchers, radar launchers
and high frequency and high-current equipment.
Use electromagnetic shielding when necessary.

2.1.5 Lightning Protection

By design, the router is lightning protective; but excessive lightning may still damage
the device. To protect the device better, you are recommended to:
Ensure the PGND of the chassis is securely connected to the earth ground.
Ensure the earth point of the power socket is securely connected to the earth
ground.
Add a lightning arrester onto the front end of the power input to better protect the
power supply from lightning strikes.
For signal cables such as ISDN cables, telephone cables, E1/T1 cables, install a
special lightning arrester at their input end for better protection.

2.1.6 Checking the Rack

When installing the router, observe the following:
Reserve adequate clearance at the air intake exhausting vents for adequate
ventilation inside the chassis.
Make sure that the rack has a good ventilation system.
Make sure that the rack is sturdy enough to support the weight of the device and
the installation accessories.
Make sure that the rack is well-grounded.

2.2 Safety Precautions

When reading this manual, pay adequate attention to the following.
Warning appears in operation procedures that, if performed incorrectly, might
cause bodily injury to the operators or damage the device.
Caution appears throughout this manual in procedures that, if performed
incorrectly, might affect the operation of the router.
When installing or working on the router, you are recommended to:
Keep the router far away from the heat sources and water/liquid.
Chapter 2 Preparing for Installation
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