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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As noted eafliei, nowhere in the I EC system of explosion protection Is there any account taken of the potential consequences of an eyplosiori, should it occur However, plant operators often make intuitive decisions on e.

The enclosure with the breathing device in place shall comply at least with the degree of protection IP54 according to lEC When determining the required values for creepage 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.

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A test voltage of 1 V d. Two separate test samples may be required. Equipment protection by powder filling ‘q’ [ETD 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: The encapsulation “m” standard includes two levels or protection “ma” and “mb”.

NOTE 2 Consideration shall be given to the effect that a release from the breather may have- 600079-5 the surrounding atmosphere.

The text of lEC Standard has been approved as suitable for publication as an Indian Standard vi’ithout deviations. 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.

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.


The pressure shall be applied for at least IDs. When determining the requiied values for distance, the voltage value in the table may be increased by a factor of 1 1 in order 6079-5 recognize the range of rated voltages in common use.

The number of significant places retained in the rounded off value iecc be the same as thai of the specified value in this standard. NOTE Suitable techniques that may provide visible evidence of being opened are.

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This standard applies to electrical equipment, parts of electrical equipment and Ex components with: To facilitate this, a system of equipment protection levels has been introduced to clearly indicate the inherent ignition risk of equipment, no matter what type of protection is used. General requirements lECElectrical apparatus for explosive gas uec – Part- 1: Conductive parts protruding eic the insulation including soldered component pins shall not be considered as coated unless special measures have been applied to obtain an effective unbroken seal.

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. 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.

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Hazardous areas with the normal exception of coal mining; are divided into zones according ie the degree of hazard. 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. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments.

NOTE 2 The restriction on the size of the gap is intended to reduce 60079-5 escape of filling material. Test sieves of perforated plates ISO Uec 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.

Higher prospective currents than 1 A could be present in some installations, for example at higher voltages.

The maximum gap of an enclosure protected by powder filling “q” shall be at least 0,1 mm smaller than the specified smallest dimension of the filling material. 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. A true risk assessment would consider all factors. Equipment protection by increased safety “e” lEC 1Explosive atmospheres – Part 1 1: If the degree of protection is IP55 or higher, the enclosure shall be provided with a breathing device.

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.