S3100 Install Manual (For S3100-9/18/26TC (TP)) V5.0
Max Diameter (µm)
0.5
1
3
5
Max Density
(particles/m³)
1.4×105 7×105 2.4×105 1.3×105
Table 2-1 Environmental Requirements: Dust content
In addition, salt, acid and sulfide in the air are also harmful to the switch.
Such harmful gases will aggravate metal corrosion and the aging of some
parts. The site should avoid harmful gases, such as SO2, H2S, NO2, NH3
and Cl2, etc. The table below details the threshold value.
Gas
Average (mg/m³)
Max (mg/m³)
SO
2
0.2 1.5
H
2
S 0.006
0.03
NO
2
0.04 0.15
NH
3
0.05 0.15
Cl
2
0.01 0.3
Table 2-2 Environmental Requirements: Particles
T e m p e r a t u r e a n d H u m i d i t y
The switch installation site should maintain a desirable temperature and
humidity. High-humidity conditions can cause electrical resistance
degradation or even electric leakage, degradation of mechanical properties
and corrosion of internal components. Extreme low relative humidity may
cause the insulation spacer to contract, making the fastening screw
insecure. Furthermore, in dry environments, static electricity is liable to be
produced and cause harm to internal circuits. Temperature extremes can
cause reduced reliability and premature aging of insulation materials, thus
reducing the switch’s working lifespan. In the hot summer, it is
recommended to use air-conditioners to cool down the site. And the cold
winter, it is recommenced to use heaters.
The recommended temperature and humidity are shown below:
Temperature: Relative
humidity
Long term condition
Short term condition
Long term condition
Short term condition
15 ~ 30°C
0 ~ 50°C
40 ~ 65%
10 ~ 90%
Table2-3 Environmental Requirements: Temperature and Humidity
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