AS NZS 1768 PDF

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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For example, at a particular facility, it may be considered that a chance of 1 in of economic loss due to lightning occurring over a period of a year is tolerable.

AS1768-2007 – Lightning Protection

Alternatively, both organizations publish an annual printed Catalogue with full details of all current Standards. Irrespective of claimed performance, air terminals shall be placed in accordance with Section 4 sa comply with this Standard.

Public money would normally be spent to try to eliminate or reduce to a level as low as reasonably practical the causes of risks greater than 10—4 per year i. Unless it has been specified that lightning protection must be provided, the first decision to make is whether the lightning protection is needed.

For telecommunication overvoltages, AS Please fill this form, we will try to respond as soon as possible. Do not 17768 in open vehicles such as tractors, beach buggies, or any other type of open or enclosed vehicle without a metallic roof.

Where danger from other causes a as toxicity, asphyxiation, and radioactivity may arise this is specifically mentioned. There may be significant loss of revenue economic loss associated with damage to computer centres and communication nodes.

AS/NZS – Standards Australia

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, L3 will apply to museums, galleries, libraries and heritage listed buildings while L2 applies to structures involved in the provision of public service utilities such as water, gas, electricity and telecommunications.

To reduce lightning damage and its consequential effects, lightning protection measures may be required. 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.

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This should be done before the storm is local to minimize risk of personal injury. Size px x x x x Alternatively, this would mean that it is considered acceptable for such a loss to occur, on average, once every years. We need your help to maintenance this website.

aw Isolated buoys and pylons should be avoided. You may be required to comply with this standard if you intend to design, install or operate a small generation unit.

The recommendations apply generally to the protection of structures using LPSs comprising air terminals, downconductors, equipotential bonding and az terminations. This standard provides guidelines for the protection of people and property from lightning.

In the risk management approach, the lightning threats that create risk are identified, the frequencies of all risk events are estimated, the consequences of the risk events are determined, and if these are above a tolerable level of risk, protection measures are applied to reduce the risk R to below the tolerable level Ra. This Standard is applicable to conventional lightning protection systems LPSs that comprise air terminals, downconductors, earth termination networks and surge protective devices Nzw.

An approaching thunderstorm is treated as local nss the time interval between seeing a lightning flash and hearing the thunder is less than 30 s and then the appropriate safety measures described in Clause 3. This Standard is intended to provide authoritative guidance on the principles and practices of lightning protection for a wide range of structures and systems.

For a more comprehensive treatment of the subject covered by this Clause—see Paragraph G2, Ref. These design rules may not apply to some small structures. Swimming pool facilities are connected to a mzs surface area via underground water pipes, gas lines, electric and telephone wiring, etc.

A number of appendices are included that provide additional information and advice. A less dangerous situation is where the person is subjected to step or touch potentials, and only a small fraction of the aw current passes through the body, although the pathway taken by this fraction is still important.

Other work sheets showing the calculated values of all of the individual risk components for each type of risk are also accessible if a more in depth analysis is required. Section 6 describes 17688 of lightning protection of various items not covered in earlier sections, such as communications antennas, chimneys, boats, fences, and trees. Review the risk components and follow the Risk Management procedure detailed in Clause 2. Section 7 sets out recommendations for the protection of structures with explosive or highly-flammable contents.

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It may be composed of nsz or more simple probabilities of damage. Renewable energy certificates small-scale technology certificates may be issued after a small generation unit is installed.

Technical considerations include addressing the highest risk components while economic considerations involve minimizing the sa cost to achieve a suitable level of protection.

AS / NZS 1768 Lightning Protection – Australian Government

In most cases the structure or facility will be a stand-alone building. Ax involves a choice from a range of protection level efficiencies for protection against direct d strikes to the structure and decisions about the extent of other measures for protecting low-voltage and electronic equipment against indirect i lightning stresses incident from nearby strikes.

It applies to conventional lightning protection systems consisting of air terminations, downconductors, earthing systems and surge protective devices. Until about ten years ago, risk assessment was used to jzs if there was a need to provide lightning protection. Also referred to as acceptable risk, being the maximum value of risk acceptable based on community expectations.

The need for protection and the level of protection applied should be considered in terms of the assessment of risk due to lightning, and management of that risk to an acceptable level. The risk assessment calculator is a simplified tool for the more common structure types.

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.