1-4
Preventing electrostatic discharge
To prevent electrostatic discharge (ESD) damage, follow these guidelines:
•
Make sure the router, workbench, and rack are reliably grounded.
•
Take dust-proof measures for the equipment room.
•
Maintain the humidity and temperature at acceptable levels.
•
Always wear an ESD wrist strap and make sure it is reliably grounded when installing FRUs.
•
Place the removed interface module on an antistatic workbench or put it into an antistatic bag,
with the component side facing upward.
•
Hold an interface module by its edges when you observe or move a removed interface module.
Do not touch any electronic components.
Attaching an ESD wrist strap
1.
Wear the wrist strap on your wrist.
2.
Lock the wrist strap tight around your wrist to keep good contact with the skin.
3.
Secure the wrist strap lock and the alligator clip lock together.
4.
Attach the alligator clip to the rack or workbench.
5.
Make sure the rack or workbench is reliably grounded.
EMI
All electromagnetic interference (EMI) sources, from outside or inside of the router and application
system, adversely affect the router in the following ways:
•
A conduction pattern of capacitance coupling.
•
Inductance coupling.
•
Electromagnetic wave radiation.
•
Common impedance (including the grounding system) coupling.
To prevent EMI, use the following guidelines:
•
Take effective measures to filter interference from the power grid.
•
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.
•
Keep the router far away from high-power transmitting stations and radar stations as well as
high-frequency high-power devices.
•
Use electromagnetic shielding, for example, shielded interface cables, when necessary.
Lightning protection
To better protect the router from lightning, do as follows:
•
Make sure the chassis is reliably grounded.
•
Make sure the grounding terminal of the power receptacle is reliably grounded.
•
Install a lightning arrester at the input end of the power supply to enhance the lightning
protection capability of the power supply.
Power supply
Make sure the power supply system at the installation site is stable and meets the requirements of
the power supplies, including the rated input voltage and input current. For more information about
available power supplies, see
H3C RA5300 Router Hardware Information and Specifications
.
