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CONSIDERATIONS ON THE TESTING OF BREATHING AND DRAINING DEVICES USED IN ELECTRICAL EQUIPMENT WITH FLAMEPROOF ENCLOSURE TYPE OF PROTECTION
Abstract
The assessment of explosion-protected electrical equipment is based on the requirements of the ATEX 2014/34 / EU Directive and is made through tests and verifications carried out according to harmonized standards (of the EN 60079 series). For the type of protection flameproof enclosure, the EN 60079-0 (for general requirements) and the standard for the type of protection flameproof enclosure (EN 60079-1) are used. A breathing device is defined as a device which permits an exchange between the atmosphere within an enclosure and the surrounding atmosphere and which maintains the integrity of the type of protection. Also, draining devices are defined as devices which permits liquids to flow out from an enclosure and which maintains the integrity of the type of protection. The flameproof breathing and draining devices must incorporate permeable elements and shall withstand the pressure created by an internal explosion in the enclosure to which they are mounted. They also must prevent the explosion from being transmitted to the explosive atmosphere surrounding the enclosure. In the standard SR EN 60079-1 are specified the type tests to which the breathing and drainage devices are subjected and the order in which these tests are performed.
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References6
Rad Marcel, Increased reliability of electrical equipment used in explosive environments, Doctoral Thesis, March, (2018).
Romanian Standard, SR EN 60079-1 Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d", Romanian Association for Standardization ASRO, Bucharest, Romania, (2015).
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Directive 2014/34/EU of the European Parliament and of the Council of 26 February 2014 on the harmonization of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast) Text with EEA relevance, (2014).
Directive 1999/92/EC of The European Parliament And Of The Council of 16 December 1999 on minimum requirements for improving the safety and health protection of workers potentially at risk from explosive atmospheres (15th individual Directive within the meaning of Article 16(1) of Directive 89/391/EEC), (1999).
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