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IEC 60079-31:2008

Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"

Edition date: 2013-11-27
Cancelled
Available languages: Spanish, English, French
Summary: IEC 60079-31:2008 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. 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 shall take precedence. This first edition of IEC 60079-31 has been developed from the first edition of IEC 61241-1 (2004) which it now cancels and supersedes. The significant changes with respect to the previous edition are:
- Title changed to Equipment dust ignition protection by enclosure "t"
- Combination and rationalisation of practice A and B into a single practice, and some constructional requirements that may have applied to only one practice now apply to all enclosures
- Introduction of three levels of protection, "ta", "tb" and "tc"
- Defined test voltage ranges and overload conditions for thermal tests
- Introduction of a pressure test prior to the IP test
- Restrictions on power and voltage levels for level of protection "ta"
- Introduction of a variant of the IP6X test for level of protection "ta"
- Compulsory dust layer thermal test for protection level "ta" by surrounding the enclosure with dust to a depth of at least 500 mm on all available surfaces. The contents of the corrigendum of March 2009 and Interpretation Sheet 1 of February 2022 have been included in this copy.

La CEI 60079-31:2008 est applicable au matériel électrique protégé par enveloppe et limitation de la température de surface, pour une utilisation en atmosphère de poussière explosive. Elle spécifie les exigences de conception, de construction et d'essai pour le matériel électrique. La présente norme complète et modifie les exigences générales de la CEI 60079-0. Lorsqu'une exigence de la présente norme est en conflit avec une exigence de la CEI 60079-0, l'exigence de la présente norme prévaut. Cette première édition de la CEI 60079-31 est issue de la première édition de la CEI 61241-1 (2004) qu'elle annule et remplace. Les modifications importantes par rapport à l'édition précédente sont:
- Titre modifié pour Protection du matériel contre l'inflammation de poussières par enveloppe "t"
- Regroupement et rationalisation des méthodes A et B en une seule méthode, et de certaines exigences de constructions qui n'étaient appliquées qu'à une seule méthode et qui maintenant sont applicables à toutes les enveloppes
- Introduction des trois niveaux de protection, "ta", "tb" et "tc"
- Les gammes de tensions d'essai et les conditions de surcharge pour les essais thermiques ont été définies
- Introduction d'un essai de pression avant l'essai IP
- Réduction des niveaux de puissance et de tension pour le niveau de protection "ta"
- Introduction d'une variante de l'essai IP6X pour le niveau de protection "ta"
- Essai thermique de couche de poussière obligatoire pour le niveau de protection "ta" par enfouissement de l'enveloppe dans de la poussière dont la couche a une épaisseur d'au moins 500 mm sur toutes les surfaces accessibles. Le contenu du corrigendum de mars 2009 a été pris en considération dans cet exemplaire.
ICS: 29.260.20-Electrical apparatus for explosive atmospheres
CTN: TC 31 - 1232

Standards Cancellations

Es anulada por IEC 60079-31:2013

Correcciones Normas

Es corregida por IEC 60079-31:2008/COR1:2009

Modificaciones Normas

Es interpretada por IEC 60079-31:2008/ISH1:2022

Reemplazo Normas

Reemplaza a IEC 61241-1:2004

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