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.
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The accreditation or acceptance shall show Ex certification for an ISO Type 5 system in the Ex field, as part of their capability; and ISBN 8 o d the certification system shall also require — i testing of samples for compliance with relevant lEC Standards or Australian Standards; ii assessment and audit of manufacturers by the Certification body, for compliance of their ax system according to ANZEx or lECEx requirements or equivalent; and S “3 iii on-going surveillance audits of manufacturers, in accordance with ANZEx or E lECEx quality requirements or equivalent, by the Certification body, responsible ” for issuing the Certificate.
El e ctrical installations AS: Under such conditions, the equipment hzs be provided with suitable devices to ensure satisfactory prevention or draining of condensate. Explosive atmospheres shall be avoided and the equipment, whenever practicable, shall be sited in locations where such atmospheres are not likely to occur. NOTE 3 Protection relay The protection relay for machines in accordance with type of protection ‘e’ should, in addition to the requirements of Claus e 7: Conduits and, in special cases, cables e.
Different protection concepts have different maintenance requirements. Alternative marking measures shall be taken inside measuring and control cabinets, switchgear, distribution equipment, etc.
AS-NZS 60079 & Other AS-NZS Standards
NOTE 1 If the first fault is not removed, a subsequent fault on the same phase will not be detected, possibly leading to a dangerous situation. The integrity of electrical equipment may be affected if it is operated under temperature or pressure conditions outside those for which the equipment has been constructed.
Protective devices shall be manually reset only. Areas where dust, flyings and fibres in air occur in dangerous quantities are classified as hazardous and are divided into three zones according to the level of risk. The application of a cable sealing device may only mitigate the ax of vapour transmission and additional attenuation measures may be necessary.
We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. In order to protect against unauthorized interference and damage, the components and wiring of intrinsically safe apparatus and associated apparatus e.
60079 earthing or bonding should be maintained; the flexible tubing should not be the sole means of earthing. NOTE 2 In the situation where equipment is dual certified e.
AS-NZS 60079-14: Explosive atmospheres – Electrical installations design, selection and erection
This would make equipment selection easier and provide the ability to better apply a risk assessment approach, where appropriate. Additional requirements in the case of dust: Where cables are subject to vibration, they shall be designed to withstand that vibration without damage. Suitable grease may be used provided it is non-setting, non-metallic and qs and any earthing between the two is maintained. NOTE 1 Attention is drawn to the risks that can arise when equipment is subject qs prolonged tiumidity and wide temperature variations.
No faults between circuits are taken into consideration. In the absence of lEC standards on process sealing for electrical equipment, national or other applicable standards such as lEC should be followed. In this case, means or equipment for direct temperature control by embedded temperature sensors specified in the motor documentation, other effective measures for limiting the temperature of the motor nzz be provided or the speed control device ensures that the motor run up is such that the temperature is not nnzs.
NOTE 2 Galvanic isolation may be achieved via the associated apparatus or 660079 galvanically isolating apparatus within an intrinsically safe circuit in EPL ‘Gb’, ‘Gc’ or non-hazardous locations. In the case of parallel connection of both poles of the sources see Figure B. Figure 2 – Selection chart 660079 cable entry devices into flameproof enclosures for cables complying with item b of Nationa l or other standards should be followe d for conduit syst e ms.
Exposed conductive parts need not be separately connected to the equipotential bonding system if they are firmly secured to and are in conductive contact with structural parts or piping which are connected to the equipotential bonding system. NOTE The form in which information in the descriptive system document necessary to ensure safety should be 600079 is not stated precisely and may be covered by a number of sources such as drawings, schedules, maintenance manuals or similar documents.
Where the starting duty is arduous or starting is required frequently, the protection device should be selected so that it ensures limiting temperatures are not exceeded under the declared operational parameters of the machine. Where cables enter into flameproof equipment directly, the cable system shall comply with NOTE 3 For motors with type of protection ‘e’ or ‘n’ terminal boxes, when using converters with high-frequency pulses in the output, care should be taken to ensure that any overvoltage spikes and higher temperatures which may be produced in the terminal box are taken into consideration.
The maximum surface temperature of the eqferpment apparatus when 600079 in the dust- free test method in Arduous starting conditions are considered to ax if an inverse-time delay overload protective device, correctly selected as above, disconnects the motor before it reaches its rated speed.
Australian Hazardous Area Standards – AS-NZS | E-x Solutions
Conduit shall nnzs provided with a conduit sealing device where it enters or leaves a hazardous area, to prevent 6007 transmission of gases or liquids from the hazardous areas to non- hazardous areas. Zoning does not take account of the potential consequences of an explosion. COPYRIGHT 61 b If the installation is effected and maintained in such a manner that there is a high level of assurance that potential equalization exists between each end of the circuit i.
NOTE Pressurized enclosures protected by static pressurization should be moved to a non-hazardous area for refilling if pressurization is lost. Associated apparatus should preferably be 06079 outside the hazardous area or, if installed inside a hazardous area, shall be provided with another appropriate type of protection in accordance with C l nnzs e 5 which is suitable for the ignition sources which the associated apparatus may present.
Failure of the primary seal should also be annunciated e. The calculation of the capacitance depends on the electrical connection of bus cable and screen.
For required safety measures concerning combustible dusts, see 5. When measuring capacitance, any screens or unused cores should be joined together and connected to one side of the circuit being measured.
These standards are developed through an open process of consultation and consensus, in which all interested parties are invited to participate. NOTE 1 Silicone based greases are often suitable for this purpose but care needs to be taken concerning use with gas detectors. 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.
If flexible metallic tubing is used, it and its fittings shall be so constructed that damage to the cable consequent upon its use is avoided.
If the earth connection is achieved via junction boxes, nza care should be taken to ensure the continued integrity of the connection. The supply shall be prevented from being switched on again until the doors and covers have been re-closed. It should be noted that the application of a cable sealing device may only mitigate the rate of vapour transmission and additional attenuation measures may be necessary.