AS NZS 1768 PDF

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For many decades, the principals and senior management of LPI have been providing specialist lightning protection advice to customers in some of the most. Visit our website and learn more about AS/NZS standards. You may require this Standard if you are an electricity network operator or electrical contractor and intend to: design; construct; commission.

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Direct and nearby cloud-to-ground lightning discharges can be hazardous to persons, structures, installations and many other things in or on them. In the case of pipelines, with no metallic gasket on flanges, conveying explosive fluid.

AS/NZS – Standards Australia

Do not lie on the ground as this could cause dangerous voltage to develop across the body by earth currents generated by a nearby strike. For example, in theatres and halls there can be a significant risk of panic if a lightning strike causes loss of electricity supply or other mechanical or fire-related damage.

Complying with this standard is not mandatory. For information about these services, users should contact their respective national Standards organization. The TP for incoming services includes the use of isolation devices, the shielding of cables and the installation and coordination of SPDs. What documents provide more information?

A receding local thunderstorm is no longer ns threat when more than 30 min have elapsed after the last thunder is heard. Where doubt exists as to the need for lightning protection, further advice should be sought from a lightning protection designer or installer.

We are a non-profit group that run this website to share documents. Persons indoors should avoid using the telephone and contacting metallic structures. Do not enter the water, and in general avoid contact with water. Irrespective of claimed performance, air terminals shall be placed in accordance with Section 4 to comply with this Standard.

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Do not use personal computers and other electronic and electrical equipment, and avoid contacts with sinks, nze, refrigerators, metallic pipes and other large metallic objects in the house. Persons and equipment within buildings can be at risk from the indirect effects of lightning and Section 5 gives recommendations for the protection of persons and equipment within buildings from the effects of lightning.

Lightning strikes to a person, or close by, may cause death or serious injury. These checks are particularly important when planning and undertaking activities involving groups and large numbers of people.

AS / NZS Lightning Protection

This includes information on the size, material, and form of conductors, the positioning of air terminals and downconductors, and the requirements for earth terminations.

For example, the nature of the burns and the extent of damage to underlying muscle tissue tend to be severe with electric power current, but mild with lightning current. In the first aid treatment of a patient injured by lightning, it is essential that breathing be restored by artificial respiration and blood circulation be restored by external cardiac massage, if appropriate. This involves defining the extent of the facility or structure being assessed. Please consult the Contact Officer for more information and to ascertain the level of compliance if any that may be required.

Standards Catalogue

The LEMP protection includes a number of measures to protect sensitive electronic equipment such as the use of a mesh of downconductors to minimize the internal magnetic field, the selection of lightning protection zones, equipotential bonding and earthing, and the installation of SPDs. Regarding the potential types of risk due to lightning listed in Clause 2.

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Where danger from other causes such as toxicity, asphyxiation, and radioactivity may arise this is specifically mentioned. This figure has been derived from ground flash density data obtained from the Lightning Detection Network of New Zealand for the period January 1, through February 9, Consequential effects of lightning damage may extend to the surroundings of a structure.

A clause is included on methods for protecting domestic dwellings and assorted structures in public places, where a complete protection system may not be justified, but some protection is considered desirable.

Additional protection may be gained by anchoring under relatively high objects such as jetties and bridges, provided that direct contact is not made with them. Do not stand on or under bridges or other elevated structures.

This rise in local earth potential can result in a breakdown between the person and the telephone, which is connected to a nominal remote earth via the telecommunications service line. It may also be important to specify other protection measures such as SPDs on incoming conductive electrical ax lines and internal equipment.

AS1768-2007 – Lightning Protection

Some inputs require numerical values e. We need your help! Technical considerations include addressing the highest risk components while economic considerations involve minimizing the total cost to achieve a suitable level of protection.