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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Typical values of the damage factors for each type of loss are given in Appendix A and in the risk management calculation tool. The approach outlined in this section is based on the principles of the management of risk due to lightning outlined in initial work by IEC Committee TC 81 on this subject. Please consult the Contact Officer for more information and to ascertain the level of compliance if any that may be required. In general, it is not economically possible to provide total protection against all the nzw damaging effects of lightning, but the recommendations in this Standard will reduce the probability of damage to a calculated acceptable level, and will minimize any lightning damage that does occur.

AS1768-2007 – Lightning Protection

Where a new structure is to be erected, the matter of lightning protection should be considered in the planning stage, as the necessary measures can often az affected in the architectural features without detracting from the appearance of the building. Independently of these electrically-related effects, temporary or permanent hearing impairment may be experienced as a consequence of the extremely high sound pressure levels associated with a nearby lightning strike. Section 6 describes methods of lightning protection of various items not covered in earlier sections, such as communications antennas, chimneys, boats, fences, and trees.

An example of this might be a communications installation at the top of an office building. Review az risk components and follow the Risk Management procedure detailed in Clause 2. Tall trees and surrounding buildings may shield a structure from lightning strikes. This Standard was published on 10 January For a more comprehensive treatment of the subject covered by this Clause—see Paragraph G2, Ref. Contact Email, Phone and Address Details for this service in simple two column table format, header then data.

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Standards Catalogue

The value of each component of risk R x may be calculated using an expression similar to that shown below: It may also be appropriate to have extra zones of protection around sensitive areas with an extra level of SPD protection at the boundary of that zone. Swimming pool facilities are connected to a large surface area via underground water pipes, gas lines, electric and telephone wiring, etc.

Lightning strike victims are sometimes thrown violently against an object, or are hit by flying fragments of a shattered tree, so first aid treatment may have to include treatment for traumatic injury.

Where modern fixed line telephonist headsets are used, this increases the risk of human injury through external transients being conducted through to those wearing the headsets. These design rules may not apply to some small structures. We need your help!

It is not intended for mandatory application nsz, if called 1678 in a contractual situation, compliance with this Standard requires compliance 11768 all relevant clauses of the Standard ns that the level of protection will be sufficient to achieve a tolerable level of risk as determined by the risk calculation.

The surge protection options offered are for: In this Section, the following sources of damage, relating to the proximity of the lightning strike, are taken into account see Table 2. Possible protection measures include— a suitable application of SPDs on all external conductive electrical service lines at the point-of-entry to the structure primary or point-of-entry surge protection ; and b suitable application of SPDs on all internal equipment secondary surge protection at the equipment.

The recommendations specifically cover the following applications: If the application of these protection measures cannot fulfil this condition, specific protection measures shall be provided according to the values of the risk components refer to detailed calculations and assumptions in Appendix A. Avoid unnecessary contacts with communication or navigation equipment.

AS/NZS – Standards Australia

Isolated buoys and pylons should be avoided. Consequential effects of lightning damage may extend to the surroundings of a structure.

If, after completing the LPS risk assessment, it is evident that surge protection is required to protect internal systems within the building and services at entry to the buildings then the requirements of Section 5 shall be applied. The recommendations apply generally to the protection of structures using LPSs comprising air terminals, downconductors, equipotential bonding and earth terminations.

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Use the spreadsheet to recalculate the risk components and total risk figures for any protection measures proposed. It may also be important to specify other protection measures such as SPDs on incoming conductive electrical service lines and internal equipment.

A range of protection measures can be selected to reduce the risk to less than a target value. Between editions, amendments may be issued.

AS / NZS Lightning Protection – AG – Australian Business Licence and Information Service

Where doubt exists as to the need for lightning protection, further advice should be sought from a lightning protection designer or installer. In addition to the aesthetic considerations, it is usually less expensive to install a lightning protection system during construction than afterwards.

Before any decision is made not to install lightning protection to a structure, consideration should be given to the factors outlined in other sections of this Standard. There az no danger in touching a person who has been struck by lightning. It may be composed of one or more simple probabilities of damage.

For practical applications of risk assessment, it is useful to distinguish between three basic types of damage that can appear as the consequence of a lightning strike. However, if you can show that you complied with the provisions sa this standard then that will be regarded sa evidence that you have met your obligation to carry out electrical work safely. A receding local thunderstorm is no longer a threat when more than 30 min have elapsed after the last thunder is heard.

As a result, people may be injured in the panic to evacuate the building. Neurological and cardiac injuries also ss different, and follow different courses. The total risk, R, is made up of the sum of a number of risk components associated with the four possible sources of damage according to the point of strike as listed below: