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    • CAN/CSA-C22.2 NO. 61241-4:12

    Codes & Standards - Purchase

    CAN/CSA-C22.2 NO. 61241-4:12

    Electrical apparatus for use in the presence of combustible dust - Part 4: Type of protection "pD" (Adopted IEC 61241-4:2001, first edition, 2001-03, with Canadian deviations)
    SKU: 2421656 Published by CSA Group Publication Year 2012 76 pages Withdrawn

    Product Details

    • Preface/Scope
    Preface

    This is the first edition of CAN/CSA-C22.2 No. 61241-4, Electrical apparatus for use in the presence of combustible dust - Part 4: Type of protection pD, which is an adoption, with Canadian deviations, of the identically titled IEC (International Electrotechnical Commission) Standard 61241-4 (first edition, 2001-03). It is one in a series of Standards issued by CSA under Part II of the Canadian Electrical Code.

    This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.

    Scope

    This part of IEC 61241 gives requirements on the design, construction, testing and marking of electrical apparatus for use in combustible dust atmospheres in which a protective gas (air or inert gas), maintained at a pressure above that of the external atmosphere, is used to prevent the entry of dust which might otherwise lead to the formation of a combustible mixture within enclosures which do not contain a source of combustible dust.

    This Standard contains the specific requirements for construction and testing, including protective requirements that apply to electrical apparatus with type of protection pressurization pD intended for use in potentially combustible dust atmospheres.

    This Standard includes the requirements for the construction of the enclosure and its associated components, including, if any, the inlet and outlet ducts for the protective gas, and for the safety provisions and devices necessary to ensure that pressurization is established and maintained for type of protection pressurization pD.

    Requirements for pressurized enclosures with an internal source of dust release are not included in this standard.

    This Standard does not cover the requirements for pressurized rooms with or without internal sources of dust release.

    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 cover combined gas and dust hazard. Those requirements are under consideration.

    The requirements contained in this standard are supplementary to those in IEC 61241-1-1.

    ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    Préface CSA

    Ce document constitue la première Ă©dition de la CAN/CSA-C22.2 nº 61241-4, MatĂ©riels Ă©lectriques destines Ă  Ăªtre utilisĂ©s en prĂ©sence de poussières combustibles - Partie 4 : Type de protection «pD». Il s'agit de l'adoption, avec exigences propres au Canada, de la norme CEI (Commission Électrotechnique Internationale) 61241-4 (première Ă©dition, 2001-03). Elle fait partie d'une sĂ©rie de normes publiĂ©es par la CSA qui constituent le Code canadien de l'Ă©lectricitĂ©, Deuxième partie.

    Cette norme est jugée convenable à l'évaluation de la conformité selon le domaine d'application établi dans la norme.

    Domaine d'application

    La prĂ©sente partie de la CEI 61241 expose les exigences en matière de conception, de construction, d'essais et de marquage des appareils Ă©lectriques destinĂ©s Ă  Ăªtre utilisĂ©s au sein d'atmosphères de poussières combustibles dans lesquelles un gaz protecteur (air ou gaz inerte), maintenu Ă  une pression supĂ©rieure Ă  celle de l'atmosphère extĂ©rieure, sert Ă  empĂªcher la pĂ©nĂ©tration de poussière, qui conduirait, sans cette prĂ©caution, Ă  la formation d'un mĂ©lange combustible Ă  l'intĂ©rieur d'enceintes ne contenant pas elles-mĂªmes de source de poussière combustible.

    La prĂ©sente norme inclut les exigences spĂ©cifiques de construction et d'essais, y compris les exigences en matière de protection, applicables aux appareils Ă©lectriques protĂ©gĂ©s par pressurisation «pD» et destinĂ©s Ă  Ăªtre utilisĂ©s dans des atmosphères susceptibles de contenir des poussières potentiellement combustibles.

    La présente norme inclut les exigences de construction de l'enceinte et des composants associés, y compris les éventuelles conduites d'entrée et de sortie du gaz protecteur, ainsi que les mesures et dispositifs de sécurité nécessaires pour garantir l'établissement et le maintien de la pressurisation de protection «pD».

    Les exigences concernant les enceintes pressurisées contenant une source interne d'émission de poussière ne sont pas traitées dans la présente norme.

    La présente norme ne traite pas des exigences relatives aux salles pressurisées, avec ou sans sources internes d'émission de poussière.

    La présente norme ne s'applique ni aux poussières d'explosives qui n'ont pas besoin de l'oxygène atmosphérique pour brûler, ni aux substances pyrophores.

    La présente norme ne traite pas des dangers liés aux combinaisons de gaz et de poussière. Les exigences à cet égard sont à l'étude.

    Les exigences contenues dans la présente norme complètent celles de la CEI 61241-1-1.
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