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

A true risk assessment would consider all factors. For explosive dust atmospheres, the present system of marking the zones on equipment is being replaced by marking the EPLs. Copyright BIS has the copyright 6079-5 all its publications.

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KOTH 1 It is acknowledged that the enclosure may need to be destroyed in order to determine tlie entrance of dust or water. 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. Search the history of over iex web pages on the Internet. For further information, see Annex 6009-5.

However, due to the small free volumes in the filling material and due to the quenching of a flame which may propagate through the paths in the filling material, an external explosion is prevented.


Bureau of Indian Standards BIS is a statutory institution established under tine Bureau of Indian Standards Act, to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. These EPLs are introduced to enable an aiternatlye approach to current methods of sefecting Ex equipment. Where integral fuses are used as protective devices, the fusing element shall be of the enclosed type, for example, in glass or ceramic.

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. The enclosure shall be marked in accordance with 6 b. The filling material complies with the requirements, if the ic current does not exceed A.

NOTE Typically, communications circuits and gas detection equipment will be constructed to meet the Ma. No part of the these publications may be reproduced in any form without tfie prior permission in writing of BIS.

Such components should be chosen and located in the equipment so that they are representative of the thermal characteristics of the components they represent.

This test shall be carried out after the pressure type test in 5. Equipment protection by powder filling ‘q’ [ETD The system of designating these equipment protection levels is as follows. 600779-5

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

For undated references, the latest edition of the referenced document including any amendments applies. For the majority of situations, with typical potential consequences from- a resultant explosion, it is intended that the fbllowing would apply for use of the equipment in zones this is not directly applicable for coal mining, as the zone concept does not generally apply.


The routine pressure test may be waived where the enclosure has passed a. General requirements lECElectrical apparatus for explosive gas atmospheres – Part- 1: Prior to this, Ex ia was considered to be the only technique acceptable in zone 0.

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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: This standard supplements and modifies the general requirements of lEC Reference will also be included in the classification standards lEC and lEC Tests shall be carried out iev normal equipment conditions, but may be effected without the filling material present.

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.

This does not apply to conductors used for externa! 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. Equipment protection by increased safety “e” lEC 1Explosive atmospheres – Part 1 1: NOTE Typically, all the coal winning equipment will be constructed to meet the Mb requirements – for example Ex d motors and switchgear.

The enclosure shall be marked in accordance with 6 a. A test voltage of 1 V d.