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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EnergySafety Opens in new window. Any exposed conductive parts may be unearthed or earthed for example for electro-magnetic compatibility. This applies also to the individual strands of a finely stranded conductor. Alteration of the internal components of the equipment is not permitted without re-evaluation of the equipment because conditions may be created inadvertently which lead to pressure- ad, change in temperature class, or other such issues that may invalidate the certificate.
In particular, care shall be taken to ensure that the voltage and frequency are appropriate to the supply system with which the equipment is used and that the 06079 classification has been established for nsz correct voltage, frequency and other parameters. Failure of the primary seal should also be annunciated e. The sa should be de-energized at once if flammable gases are detected while operating under these conditions and re-purged before it is put back into service.
S MQlffi ax – 1. T e st m e thods — Section 1: If plugs and sockets are present in a hazardous area, they shall be to the required EPL for the area. I Standards New Zealand retains title and ownership of the copyright in this PDF file and the corresponding o permitted printed copy at all times. 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.
Australian Hazardous Area Standards – AS-NZS | E-x Solutions
However, due 600079 the snnall free volunnes in the filling nnaterial and due to the quenching of a flanne which may propagate through the paths in the filling materialman external explosion is prevented. 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.
Either this, or one of the types of cables suitable for use with transportable equipment 6009 be used. Particular specifications for conduits – Flexible conduits I EC , Isolating transformers and safety isolating transformers – Requirements lECGeneral requirements for residual current operated protective devices lECResidual current operated circuit-breakers without integral overcurrent protection for household and similar uses RCCBs – Part 1: Z o Under no circumstances may this PDF file be placed on a network of any sort without the express make are restricted to you.
Inverse-time delay overload protection relays may be acceptable ws machines of duty type S1 which have easy and infrequent starts.
Australian New Zealand Standard AS / NZS 60079:2009 Explosive Atmospheres – Western Australia
For explosive dust atmospheres the present system of marking the zones on equipment is being replaced by marking the EPLs. The sealing device shall incorporate compound or other appropriate seals which permit stopping around individual cores.
NOTE 3 An exannple of a specified abnornnal condition is a luminaire with a failed lamp. Figure 2 – Selection chart for cable entry devices into flameproof enclosures for cables complying with item b of The points at which the protective gas enters the supply duct s shall be situated in a non-hazardous area, except for cylinder supplied protective gas.
NOTE The type of built-in temperature sensors and associated protective device will be identified on the machine. Such temperature rise may be most notable at constant rated load conditions. 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.
Such precautions may include a special permit to work in the assured absence of an explosive atmosphere, though more satisfactory safeguards may be taken, e. Precautions may be necessary to ensure safety from other possible ignition sources, but guidance on this aspect is outside the scope of this Standard.
Mitigation Substitution involves, for example, replacing a flammable material by one which is either not flammable or less flammable. COPYRIGHT 38 The insulating elements required for the cathodic protection, for example Insulating elements in pipes and tracks, should if possible be located outside the hazardous area.
Conduits and, in special cases, cables e. 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 surface temperature of the motor housing shall be provided or the speed control device ensures that the motor run up is such that the surface temperature is not exceeded.
Plugs and sockets used for connection of external intrinsically safe circuits shall be separate from, and non-interchangeable with, those of circuits which are not intrinsically safe. Examples include compacted strands, sealing of the individual strands, and extruded bedding. NOTE The provision of two 6009 conductors should be considered to facilitate testing. To meet the degree of protection required by the enclosure, in addition to the use of conduit sealing devices, it may be necessary to seal between the conduit and the enclosure for example by means of a sealing washer 6009 non-setting grease.
Often the installation is inside or close nnzs explosive atmospheres and radiation from such equipment may pass through these atmospheres. Published on 15 August Preference should be given to RCDs with a rated residual operating current of 30 mA.
Conductor connections, with the exception of those in flameproof conduit systems, intrinsically safe circuits and energy-limited circuits, shall be made only by means of compression connectors, secured screw connectors, welding or brazing. Prior to this, Ex ae was considered to be the only technique acceptable in Zone 0.
Special cable construction can be employed as means of reducing migration and preventing the propagation of flame. Pressurizing equipment, such as an inlet fan or compressor, that is used to supply protective gas should preferably be installed in a non-hazardous area. Where 600079 enter into flameproof equipment directly, the cable system shall comply with Contact Email, Phone and Address Details for this service in simple two column table format, header then data.
AS-NZS 60079-14: Explosive atmospheres – Electrical installations design, selection and erection
If the intrinsically safe apparatus does not withstand the electrical strength test with at least V a. NOTE 2 Since the use of insulated conductor or cable which retards flame propagation and complies with the recommended requirements of lEC is not sufficient by itself to prevent propagation of fire under all conditions of installation, it is recommended that wherever the risk of propagation is high, for example in long vertical runs of bunches of cables, special installation precautions should also be taken.
In the case of identical circuits, failures need not be taken into consideration provided that each circuit passing through the cable has a safety factor for spark ignition parameters of four times that required for level of protection ‘ia’ or ‘ib’. That this is the highest value of capacitance should be confirmed by measuring the other combination of cores and screen.