FIELD: process engineering.
SUBSTANCE: invention relates to air filtration. Telecommunication station comprises telecommunication electronic components, cooling device including the case accommodating telecommunication electronic components. Said case has ambient air inlet and filter element for filtration of ambient air. Filter element is composed of no-diaphragm filter element including filter material with bearing substrate and tangle of fibres. Said tangle of fibres comprises hydrophobic fibres that allow filtration efficiency above filtration class MERV 14. Filter element is charged electrostatically to form a charged dielectric to make filter material water impermeable and to pass the test in acid mist in compliance with standards GR-487-CORE and ASTM B 117.
EFFECT: higher efficiency of filtration.
24 cl, 19 dwg, 2 tbl, 3 ex
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