By IEC TC/SC 31
Comprises particular necessities for the development and trying out of electric equipment with the kind of safety flameproof enclosure ""d"", meant to be used in explosive gasoline atmospheres.
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Additional resources for Iec 60079-1-Electrical Apparatus For Explosive Gas Atmospheres. Flameproof Enclosures D
Sample text
C L’interstice maximal de la partie cylindrique augmenté à 0,25 mm si f < 0,5 mm. NOTE Pour la détermination de l’interstice maximal, il est recommandé de prendre les valeurs de construction arrondies selon l’ISO 31-0. 7. b Maximum gap of cylindrical part increased to 0,20 mm if f < 0,5 mm. c Maximum gap of cylindrical part increased to 0,25 mm if f < 0,5 mm. NOTE The constructional values rounded according to ISO 31-0 should be taken when determining the maximum gap. 3 60079-1 © CEI:2003 Joints filetés Les joints filetés doivent répondre aux exigences des Tableaux 3 ou 4.
7 Exigences complémentaires pour les joints des matériels électriques du Groupe IIC Les joints plans ne sont pas admis pour le matériel électrique du Groupe IIC destiné à être utilisé dans une atmosphère explosive gazeuse contenant de l’acétylène sauf seulement pour les enveloppes dont le volume ne dépasse pas 500 cm 3 et si l'interstice est ≤0,04 mm et L ≥ 9,5 mm. Joints dentelés Les joints plans dentelés n’ont pas besoin d’être conformes aux exigences des Tableaux 1 et 2 mais doivent avoir a) au moins cinq dents complètement engagées, b) un pas supérieur ou égal à 1,25 mm, et c) un angle inscrit de 60° (±5°).
1, so as to form a flameproof joint. 2, if the element arrangement passes the type test in Clauses 14 through 16. If necessary, a clamping ring or similar means can be used to maintain the integrity of the enclosure. The breathing or draining element can be mounted – either from within, in which case the accessibility of screws and clamping ring shall be possible only from the inside, or – from outside the enclosure, in which case the fasteners shall comply with Clause 11. 7 of IEC 60079-0. 9 Breathing devices and draining devices when used as Ex components Breathing and draining devices as Ex components are limited to application on flameproof enclosure volumes of 3 l (litres) or less.