IEC 60079-5 PDF

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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NOTE Typically, all the coal winning equipment will be constructed to meet the Mb requirements – for example Ex d motors and switchgear.

Over-current devices shall have a voltage rating not less than that of the circuit and shall have a breaking capacity not less than the prospective fault current of the circuit. 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: NOTE Typically, communications circuits and gas detection equipment will be constructed to meet the Ma.

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The enclosure with the breathing device in place shall comply at least with the degree of protection IP54 according to lEC This would make equipment selection easier and provide the ability to better apply a risk assessment approach, where appropriate.

If a currerit-limiting device is necessary to limit the prospective short-circuit current to a value not greater than the rated breaking capacity of 600795- fuse, this device shall be a resistor according to 4. Where items other than fuses are used as protective devices for temperature limitation, the equipment shall be tested to verify that the- limiting temperature is not exceeded when those protective devices operate.

Where a requirement of this standard conflicts with a requirement of lECthe requirement of this standard will take precedence. For the purpose of deciding whether a particular requirement of tfiis standard is complied with, the final value, observed or oec expressing the result of a test, shall be rounded off in accordance with IS 2: For further information, ief Annex A. Conductive parts protruding from the insulation including soldered component pins shall not be considered as coated unless special measures have been applied to obtain an effective unbroken seal.

Hazardous areas with the normal exception of coal mining; are divided into zones according to the degree of hazard. This standard applies to electrical equipment, parts of uec equipment and Ex components with: This standard supersedes IS For undated references, the latest edition of the referenced document 60079- any amendments applies. In the past, she equipmenf selection standard has provided a solid link between the type of prolectton for the equipment and the zone in which the equipment can be used.


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

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

Siandards for kec Inaian Standards also exist The corresponding Indian Standards which are to be substituted in their respective places are listed belovv’ along with their degree of equivalence for the editions indicated: The text of lEC Standard has been approved as suitable for publication as an Indian Standard vi’ithout deviations.

Any breathing devices shall be in place.

NOTE Suitable techniques that may provide visible evidence 600795- being opened are. The test shail be conducted on an empty enclosure without the powder filling installed.

Prior to this, Ex ia was considered to be the only technique acceptable in zone 0. Where integral fuses are used as protective devices, the fusing element shall be of the enclosed type, for example, in glass or ceramic.

The lest voltage shall be 1 OOOVd.

A test voltage of 1 V d. The degree of hazard is defined according to the probability 6007-5 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.

Transformers, coils and windings, which comply with I EC or transformers which comply with the requirements for mains transformers, level of protection ia or ib, in iEC 1 are not subject to fault. For this purpose, the electrode arrangement shown in Figure 1 shall be used. Copyright BIS has the copyright of all its publications.

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The maximum gap of an enclosure protected by ic filling “q” shall be at least 0,1 mm smaller than the specified smallest dimension of the filling material. Review of Indian Standards Amendments are issued to standards as the iiec arises on the basis of comments.

These EPLs are introduced to enable an aiternatlye approach to current methods of sefecting Ex equipment. Explosive atmospheres, Part 5: If the degree of protection is IP55 or higher, the enclosure shall be provided with a breathing device. To facilitate this, a 600799-5 of equipment protection levels has been introduced to clearly indicate the inherent ignition risk of equipment, no matter what type of protection is used. NOTE 2 The restriction on the size of the gap is intended to reduce the escape of filling material.


When determining the required values for creepage and clearance, the 60079-55 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. Test sieves of perforated plates ISO Test sieving — Methods using test sieves of woven wire cloth and perforated metal plate Only the English language text of the international Standard has been retained while adopting it in this Indian Standard, and as such the page numbers given here are not the same as in lEC Standard.

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 iev, 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.

Two separate test samples may be required. This standard supplements and modifies the general requirements of lEC These enclosures shall be marked with the symbol “X” in accordance with NOTE To simulate overload conditions which may cause higher temperatures than in normal operation, it might be suitable to use power components mounted in the equipment and subject to the maximum available power.

The pressure shall be applied for at least 10 s. The pressure shall be applied for at least IDs. Standards are also reviewed periodically; a standard alongwith amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision.

The encapsulation “m” standard includes two levels or protection “ma” and “mb”.