Installation Manual
Quidway S3026C-PWR Ethernet Switch
Chapter 2 Installation Preparation
2.2.1 Temperature/Humidity Requirements
To ensure the normal operation and service life of a switch, the user needs to
maintain the temperature and the humidity of the equipment room at a certain level.
If the humidity level in the equipment room is too high for a long time, it will lead to
bad insulation of the insulating material or even leakage. Sometimes, the
mechanical performance, changes of material, the rustiness and corrosion of some
metal parts are also likely to occur. If the relative humidity is too low, the captive
screws may become loose due to the shrinking of insulation washers. Meanwhile,
electrostatic phenomenon is likely to happen in the dry weather environment, which
will jeopardize the CMOS circuit of the switch. The higher the temperature, the
greater the damage to the switch will be. High temperature for a long time will speed
up the aging process of the insulation materials, greatly lower the reliability of the
switch and therefore affect its life span seriously.
2.2.2 Cleanness Requirements
Dust will hazard safe operation of the equipment. Falling on the equipment, it may
cause electrostatic adsorption, and hence result in poor contact of the metal
connectors or connection points. This is more likely to happen when the relative
indoor humidity is low, which will not only shorten the device's service life, but also
incur communication failures. The requirements on dust content and particle
diameter in the equipment room are shown in the following table:
Table 2-1
Requirements on dust content in an equipment room
Mechanically activated
material
Unit Content
Dust particle
Partical/m³
≤
3
×
10
4
(with dust invisible on the table
top in three consecutive days)
Note: Diameter of dust particles
≥
5
µ
m
Besides the requirements on dust, rigorous requirements are also set on the air
content of salts, acids, and sulfides in an equipment room. These harmful gases will
accelerate metal corrosion and aging process of certain parts. The equipment room
should be protected from harmful gases such as SO
2
, H
2
S, NO
2
, NH
3
and Cl
2
, the
value limits of which are shown in the following Table.
Huawei Technologies Proprietary
2-2
