BS EN 60079-31:2014 - Explosive atmospheres. Equipment dust ignition protection by enclosure "t"

BS EN 60079-31:2014

Explosive atmospheres. Equipment dust ignition protection by enclosure "t"

Status : Current   Published : July 2014
Conformity to regulation : Designated



IEC 60079-31:2013 is applicable to electrical equipment protected by enclosure and surface temperature limitation for use in explosive dust atmospheres. It specifies requirements for design, construction and testing of electrical equipment and Ex Components. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence. This standard does not apply to dusts of explosives, which do not require atmospheric oxygen for combustion, or to pyrophoric substances. This standard does not apply to electrical equipment or Ex Components intended for use in underground parts of mines as well as those parts of surface installations of such mines endangered by firedamp and/or combustible dust. This standard does not take account of any risk due to an emission of flammable or toxic gas from the dust. Consideration of additional protective measures is required where the application of electrical equipment is in atmospheres, which can contain combustible dust as well as explosive gas, whether simultaneously or separately. Where the electrical equipment has to meet other environmental conditions, for example, protection against ingress of water and resistance to corrosion, additional measures can be necessary. The measures used should not adversely affect the integrity of the enclosure. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. The major technical changes include:

- The marked maximum surface temperature shall be measured on the external surfaces of the enclosure and the surfaces of the internal components for equipment with types of protection "ta";

- Additional protection for arcing and sparking parts for "ta";

- Test for internal enclosure for level "ta" added. Keywords: explosive dust atmospheres

This publication is to be read in conjunction with

IEC 60079-0:2011


Standard NumberBS EN 60079-31:2014
TitleExplosive atmospheres. Equipment dust ignition protection by enclosure "t"
Publication Date31 July 2014
Conformity to regulationDesignated
Normative References(Required to achieve compliance to this standard)IEC 60127, IEC 60691, EN 60127, EN 60079-0, IEC 60079-0, EN 60691, ISO 965-1
Informative References(Provided for Information)IEC 60050-426, 94/9/EC
ReplacesBS EN 60079-31:2009
International RelationshipsEN 60079-31:2014,IEC 60079-31:2013
Draft Superseded By12/30261858 DC
DescriptorsExplosive atmospheres, Type testing, Dust, Protected electrical equipment, Electrical safety, Ignition, Dust explosions, Flammable atmospheres, Electric enclosures, Verification, Thermal protection, Design, Electrical equipment
Title in FrenchAtmosphères explosives. Protection contre l'inflammation de poussières par enveloppe "t" relative au matériel
Title in GermanExplosionsgefährdete Bereiche. Geräte-Staubexplosionsschutz durch Gehäuse "t"
ISBN978 0 580 78740 9
File Size1.2 MB

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