Page 182 - 1SBC104119C0202_MainCatalog_R contactors

Climatic withstand of devices

General
The life time and dependability of devices are mainly influenced by a series of climatic factors which cause their corrosion.
In practice, besides climatic conditions, there are other factors which may damage equipment such as fungi, insects (termites), dust, work site dirt
and aggressive environment (salty or sulphurous atmosphere, etc.) which can often only be identified at the place of installation.
The entrance of dust, insects, dirt, etc. in devices may be prevented if the appropriate degree of protection according to IEC 60529 is chosen.
ABB contactors have been used for many years in the most varied countries, with hot and humid climates for example: Brazil, Indonesia, India etc.
Experience has shown that ABB devices can be used in most countries throughout the world.
The climate of the country in which the device is installed is not the determining choice factor.

Account must be taken of:
–– the immediate environment of the devices (sheltered, ventilated, temperature)
–– the aggressivity of the immediate atmosphere at the place of installation
–– the length and frequency of non operating periods.

In the case of frequent condensation (Ie the formation of steam caused by rapid changes in temperature), heating resistors must be installed in
cubicles (100 to 250 W per m3 of enclosure).

The table below gives the cases where heating is necessary.

Environment no running water, Operating conditions Climate Internal heating of enclosure
Inside premises no condensation Continuous or not All climates Without

with running water Continuous All climates Without
Frequent or long stops Temperate Without
Tropical With
Outside, sheltered no running water, Continuous or not Temperate Without
no condensation
Tropical With
Outside or by the seaside with running water Continuous All climates Without
Frequent or long stops Temperate Without
10 Tropical With

The standard R series contactors are suitable for industrial environment and tropical atmospheres.

1SBC104081S0201

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