Amer Networks SS2GR50I Instalační příručka stáhnout pdf (Strana 14)

Installation Guide

2-2

the threshold value.

Gas Average (mg/m³) Max (mg/m³)

0.2 1.5

S 0.006 0.03

0.04 0.15

0.05 0.15

0.01 0.3

Table 2.2 Environmental Requirements: Particles

2.1.1.2 Temperature and Humidity

Although the switch is designed to use 4 fans, the site should still 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 is 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 ~ 95%

Table 2.3 Environmental Requirements: Temperature and Humidity

Caution

A sample of ambient temperature and humidity should be taken at 1.5m above the floor

and 0.4m in front of the switch rack, with no protective panel covering the front and rear of

the rack.

Short term working conditions refer to a maximum of 48 hours of continued operation and

an annual cumulative total of less than 15 days. Formidable operation conditions refers to

the ambient temperature and relative humidity value that may occur during an

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Amer Networks SS2GR50I Instalační příručka Strana 14