AS NZS 60079 PDF

AS/NZS (IEC , Ed. , MOD). Australian/New Zealand Standard. Explosive atmospheres. Part Design. You may be required to comply with this standard if you intend to undertake electrical work in areas where flammable gas or vapour risks may arise. Where. Looking for advice on AS-NZS & other AS-NZS certification standards? Contact E-x Solutions on (08) to speak to one of our experts today.

Author: Daikora Nigis
Country: Spain
Language: English (Spanish)
Genre: Personal Growth
Published (Last): 10 February 2011
Pages: 337
PDF File Size: 5.67 Mb
ePub File Size: 16.79 Mb
ISBN: 592-7-49262-672-8
Downloads: 33703
Price: Free* [*Free Regsitration Required]
Uploader: Nikonos

This recommendation may be met by conformity with Here, too, the heating is mainly caused by the effect of the laser beam nza dust layers or by absorption on dust particles in the atmosphere.

Australian Hazardous Area Standards – AS-NZS | E-x Solutions

The hazardous bzs end of each unused core i n mu l t i cor e cab le s cxarvcJuGtor shall either be Gonn e ct e d terminated to earth or be adequately insulated by means of terminations suitable for the type of protection.

If a protective earthing PE conductor is necessary, it shall be separately insulated in a manner similar to zs other conductors and shall be incorporated within the supply cable sheath. Portable electrical equipment with rated voltage not exceeding V to earth and with rated current not exceeding 6 A may have cables with an ordinary polychloroprene or other equivalent synthetic elastomeric sheath, with an ordinary tough rubber sheath, or with an nsz robust construction. For e xamp le: A safe work permit shall be issued appropriate to the potential ignition risk created by the use of the equipment see Annex D.

NOTE 2 Galvanic isolation may be achieved via the associated apparatus or via galvanically isolating apparatus within an intrinsically safe circuit in EPL ‘Gb’, ‘Gc’ or non-hazardous locations. General rules lECSafety requirements for electrical equipment for measurement, control, and laboratory use – Part 1: Additional cable entry holes may be made into the enclosure providing this is permitted by the manufacturers documentation.

F,2,3 — D e s i gn e rs d e sign and s election Design e rs sh a ll possess, to th e extent n e cessary to p e rform the i r tasks, the fo ll ow i ng: The Standards Council of New Zealand is the national authority responsible for the production of Standards. Variations to lECEd.

NOTE 2 Additionally, the requirennents of the equipnnent standard are intended to ensure that a fault capable of causing ignition is not likely to occur. The clearance between the bare conducting parts of field wiring terminals of separate intrinsically safe circuits shall be such that there is at least 6 mm between the bare conducting parts of connected external conductors.

Australian New Zealand Standard AS / NZS 60079:2009 Explosive Atmospheres – Western Australia

Consideration shall be given to the effect of nearby 600079 on air movement and of changes in the prevailing wind direction and velocity. Dust requirements are incUjded as an interim presentation fbr the purpose of this edition and will be refined in a next edition with other required technical changes. Where air is used as the protective gas, the source shall be located in a non-hazardous area and usually in such a position as to reduce the risk of contamination.


Guidance on the determination of cable parameters is given in This Standard was published on 1 8 September NOTE 1 If the intrinsically safe circuit is divided into sub-circuits, the locations requiring EPL ‘Ga’ sub-circuit s including the galvanically isolating elements should be level of protection ‘ia’ but sub-circuits not in locations requiring EPL ‘Ga’ need only be level of protection ‘ib’ or ‘ic’.

Significant technical changes included in this Standard, with respect to the previous lEC edition are as follows: That this is the highest value of capacitance should be confirmed by measuring ax other combination of cores and screen. Nationa l or other standards nz be followe d for conduit syst e ms. Such installations require a specific analysis of the risks involved. If however the plastic 6009 covering a conductive material the plastic shall have one or more of the following characteristics: When measuring capacitance, any screens or unused cores should be joined together and connected to one side of the hzs being measured.

The diameter of individual conductors within the hazardous area shall be not less than 0,1 mm. A true risk nzz would consider all factors.

Associated apparatus should preferably be located outside the hazardous area or, if installed inside a hazardous area, shall be provided with another appropriate type of protection in nss with C l aus e 5 which is suitable for the ignition sources which the associated apparatus may present.

The cable between the intrinsically safe apparatus in the locations requiring EPL ‘Ga’ and the surge protection device shall be installed such that it is protected from lightning.

NOTE 1 Threaded holes in pl a stic enclosures should be at right angles to the face of the enclosure due to the possible moulding nnethods for plastic enclosures, the wall of the enclosure may have draw angles.

Conduit shall nas provided with a conduit sealing device where it enters or leaves a hazardous area, to prevent the transmission of gases or liquids from the hazardous areas to non- hazardous areas.

Equipment which does not produce ignition-capable sparks or particles in normal operation. Motors may be limited by the manufacturer to 60709 fixed number of start attempts. When ignited they can burn rapidly and with considerable explosive force if mixed with air in the appropriate proportions.

The requirements or recommendations contained in published Standards are a consensus of the views of representative interests and also take account of comments received from other sources. Tests at power frequencies lECTests on electric and optical cables under fire conditions – Part The application of a cable sealing device may only mitigate the rate of vapour transmission and additional attenuation measures may be necessary.

AS-NZS 60079-14: Explosive atmospheres – Electrical installations design, selection and erection

I EC 26, Explosiv e atmosph e r e s — Port NOTE 1 With the exception of item fail of the above are part of the process of hazardous area classification. I ECIndustrial process control – Safety of analyser houses lECSafety of power transformers, power qs units and similar – Part Hazardous areas with the normal exception of coal mining are divided into zones, according to the degree of hazard.


In the case of series connection of the associated apparatus with galvanic isolation between intrinsically safe and non-intrinsically safe circuits see Figure B. The use of embedded temperature sensors 600779 control the limiting temperature of the machine is only permitted if such use is specified in 60709 machine documentation.

In any event, there shall be at least one electrical bonding connection of the armour to the equipotential bonding system. An enclosure containing terminals only or an indirect entry enclosure see For example, the exposed part of the bushings are within a terminal compartment which may either be another flameproof enclosure or will be protected by type of protection ‘e’.

Electrical installations design, selection and erection lECEd 4. I ECin so far as intrinsic safety is dependent on them. If the protective devices are common, the opening of a door or cover need not switch off the electrical supply to the whole assembly or initiate the alarm provided that the said opening is preceded by switching off the electrical supply to that particular equipment, except to such parts as are protected by a suitable type of protection, the common protective device continues to monitor the pressure in all the other enclosures of the group, and the subsequent switching on of the electrical supply to that particular equipment is preceded by the applicable cleaning procedure Unless permitted by the manufacturer’s documentation, two conductors of different cross- sections shall not be connected into one terminal unless they are first secured with a single compression type ferrule or other method specified by the manufacturer.

Where bonding of the armour at a cable entry point is not practical, or where design requirements make this not permissible, care shall be taken to avoid any potential difference which may arise between the armour and the equipotential bonding system giving rise to an incendive spark. Mechanical protection shall also be provided in places where the risk of damage is high.

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. The reduced voltage increases the motor current, and slip and therewith increases the temperature of the motor in the stator and rotor.

Under such conditions, the equipment should be provided with suitable devices to ensure satisfactory prevention or draining of condensate.