IEC 60079-5 PDF

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IEC CSV Standard | Electrical apparatus for explosive gas atmospheres – Part 5: Sand-filled apparatus. Apr 29, 1DV This standard part of IEC contains specific requirements for the construction, testing and marking of electrical equipment, parts. Sep 13, IS/IEC Explosive atmospheres, Part 5: Equipment protection by powder filling ‘q’. by Bureau of Indian Standards. Publication date.

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Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

The closing and sealing shall be the methods of 4. The degree of hazard is defined according to the probability of the cccurience of explosive atmospheres Generally, no account is taken of the potential consequences of an explosion, nor of other factors such as the toxicity of materials. When iecc the required values for ief and clearance, the voltage vs be increased by a factor of 1 1 in order to recognize the range of rated voltages in common us uppiy voltages given lue Ml the table may.

For further information, see Annex A. Part 7 Equipment increased safety “e” protection by increased safely “e” lEC 1 Explosive atmospheres — Part 1 1: For this purpose, the lec arrangement shown in Figure 1 shall be used. At the end of any water ingress tests, no water shall be visible inside the enclosure. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations.

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A true risk assessment would consider all factors. The pressure shall be applied for at least Ief. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Catalogue’ and ‘Standards: Reference will also be included in the classification standards lEC and lEC If the manufacturer does not provide a equired shoii circuit.

The filling material complies with the irc, if the leakage current does not exceed A. Where bare parts of energized circuits emerge from the coating, the comparative tracking index CTI in Table 2 applies to both insulation and conformal coating.

IS/IEC 60079-5: Explosive atmospheres, Part 5: Equipment protection by powder filling ‘q’

Any breathing devices shall be in place. Hazardous areas with the normal exception of coal mining; are divided into zones according to the degree of hazard. When Ex components protected by powder filling “q” are intended to be mounted inside another enclosure complying with lECthis outer enclosure ieec have a degree of protection of at least l?

Two separate test samples may be required. To facilitate this, a system of equipment protection levels has 60079–5 introduced to clearly indicate the inherent ignition risk of equipment, no matter what type of uec is used.

No part of the these publications may be reproduced in any form without tfie prior permission in writing of BIS. This standard supersedes IS If the material fails to comply, further conditioning and retesting are not permitted. The routine pressure test may be waived where the enclosure has passed a.

Explosive atmospheres, Part 5: For explosive dust atmospheres, the present system of marking the zones on equipment is being replaced by jec the EPLs.

NOTE Typically, all the coal winning equipment will be constructed to meet the Mb requirements – for example Ex d motors and switchgear. The number of significant places retained in the rounded off value should be the same as thai of the specified value in this standard.

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Except’ where specified otherwise in this standard, the minimum distance through the filling material between electrically conducting parts of the equipment and the inner surface of the enclosure shall comply with Table 1.

Where a requirement of this standard conflicts with a requirement of lECthe requirement of this standard will take precedence. There shall be no damage or distortion which could reduce the protection provided by the filling material. KOTH 1 It is acknowledged that 60097-5 enclosure may need to be destroyed in order to determine tlie entrance of dust or water.

This standard supplements and modifies the 6009-5 requirements of lEC Acceptance of equipment info each zone is historically based on the type protection, in some cases the type cf protection may be divided into different levels of protection which again historically correlate to zones For example, intrinsic safety ic divided into levels of protection ia and ib. This does not apply to conductors used for externa! Such components should be chosen and located in the equipment so that they are representative of the thermal characteristics of the components they represent.

NOTE It is not a requirement of this standard that conformity to the specification of the particle material and size rango of the particles needs to be verified. Higher prospective currents than 1 A could be present in some installations, for example at higher voltages. The maximum voltage between the parts shall be used to determine the distances according to Table 2.

The effectiveness of the protection shall be confirmed by the test of 5 1.