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Zone Division per ATEX and NEC 500

Depending on the type of materials that occur, hazardous locations are not equally at risk. The frequency and duration of occurrence of one of these substances give rise to the different protective requirements for operating equipment.


According to CENELEC and IEC, hazardous locations in Europe are divided into six different danger zones. The higher the probability that a potentially explosive atmosphere occurs, the more rigorous the requirements on operating equipment to prevent, for example, origination of sparks or hot surfaces.

Protection contre les risques d'explosion de WAGO

Les bases de la protection contre les explosions

Tout ce qu'il faut savoir sur la protection contre les explosions en un coup d'œil

Device Categories and Groups

Which resources are permitted for use in a zone can be derived from the specific operating equipment and in dependence on the zone allocation. In order to specify for which zone specific operating equipment may be used, the device group and category are relevant. The explosion protection zone in which the operating equipment may be operated is defined based on temperature classes and explosion groups.

Zone Divisions in North America

In North America, a different classification system based on the standards NEC 500 and NEC 505 is applied. Here, flammable substances are divided into three classes (Classes I to III). Explosive gases, vapors and mists of Class I are subdivided into the gas groups A, B, C and D; flammable dusts of Class II into the groups E, F and G.

Depending on the frequency or duration of occurrence of these materials, the hazardous locations are divided into so-called divisions. Division 1 corresponds to Zones 0 and 1 and Division 2 to Zone 2. In addition to the division of the explosive areas, the construction of the operating equipment and installation of the electrical systems are also differentiated.

Overview of the Gas Groups

Gas group (group)Material examples
AAcetylene
BHydrogen
CEthylene
DPropane
EMetal dust
FCoal dust
GGrain dust

Lisez-en plus :

Que se passe-t-il lors d'une explosion, quels facteurs sont déterminants et quelles mesures de protection y a-t-il ? Tout ce que vous devez savoir sur ATEX, les zones Ex, les types de protection contre les étincelles et Cie

Directives, Standards and Regulations

Les exigences relatives aux équipements électriques pour les zones potentiellement explosives sont très complexes : les réglementations, directives et normes nationales et internationales doivent être respectées afin de garantir une sécurité maximale. Nous vous donnons un aperçu des principales réglementations et recommandations légales, comme la directive ATEX.
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Device Groups

Tout comme les appareils, les gaz, les vapeurs et les poussières sont divisés en différents groupes selon leurs propriétés. Cette classification simplifie la sélection correcte des dispositifs pour les différents gaz, vapeurs ou poussières.
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Ex Protection Measures

Qui demande une protection contre les explosions ? Pour qui la protection contre les explosions s'applique-t-elle ? Qu'est-ce qui doit être considéré ? Et qu'est-ce qu'une protection constructive contre les explosions ? WAGO a compilé les réponses aux questions les plus importantes pour vous.
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WAGO Products for Explosion Protection

Automatisation

Prêt pour la zone Ex

Automatisation dans les conditions environnementales les plus défavorables ? Les produits et solutions WAGO sont faits pour cela.

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Technologie de raccordement électrique

Protection anti-explosion incluse

Approuvé pour les zones Ex : les produits WAGO qui se connectent de manière fiable dans les conditions les plus extrêmes

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Votre interlocuteur chez WAGO

Industry Management

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