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.
|Published (Last):||4 December 2018|
|PDF File Size:||6.29 Mb|
|ePub File Size:||18.87 Mb|
|Price:||Free* [*Free Regsitration Required]|
It is a relatively complex function and depends ass a the resistance component R as measured by an earth tester; b the reactance component Xdepending on the circuit path to the general body of earth; and c a modifying reducing time-related component depending on soil ionization caused by high current and fast rise times.
Some inputs require numerical values e. 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.
The possible input options are explained in a comment box, which is displayed when the cursor is positioned over the input cell. A number of completed spreadsheet examples are provided for information in Appendix A. Alternatively, this would mean that it is considered acceptable for such a loss to occur, on average, once every years. Thank you for interesting in our services.
This evaluation considers mechanical damage of the structure and contents, damage and failure of equipment, potential differences causing deaths of people and livestock from step and touch voltages, and fire damage that may result from the lightning discharge.
AS1768-2007 – Lightning Protection
Alternatively, both organizations publish an annual printed Catalogue with full details of all current Standards. An approaching thunderstorm is treated as local when 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. The nature of lightning and the principles of lightning protection are discussed and guidance is given hzs assist in a determination of whether protective measures should be taken.
If, after completing the LPS risk assessment, it is evident that 178 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. Renewable energy certificates small-scale technology certificates may be issued nzd a small generation unit is installed.
This ass defining the extent of the facility or structure being assessed. Please fill this form, we will try to respond as soon as possible. It consists of both external and internal LPSs and is defined as a set of construction rules, based on corresponding protection level. Swimming pool facilities are connected nzd a large surface area via underground water pipes, gas lines, electric and telephone wiring, etc.
There is a significant risk of side-flash for people in small, public structures such as picnic shelters, particularly those with unearthed metallic roofs.
AS / NZS 1768 Lightning Protection – Australian Government
Consideration should always be given to the application of lightning protection measures. L3 will apply to museums, galleries, libraries and heritage listed buildings while L2 applies to structures involved 176 the provision of public service utilities such as water, gas, electricity and telecommunications. In relation to human fatalities, various societal risk guidelines or criteria have been proposed. We need your help to maintenance this website.
The spreadsheet implements the risk calculations detailed in Appendix A with the required inputs and outputs presented on a single page for ease of use.
This segregation of a part of a building is only valid under the following conditions: To reduce lightning damage and its consequential effects, lightning protection measures may be required.
It is not intended for mandatory application but, if called up in a contractual situation, compliance with this Standard requires compliance with all relevant clauses of the Standard such that the level of protection will be sufficient to achieve a tolerable level of risk as determined by the risk calculation. Many human activities imply a judgement that the benefits outweigh the related risks.
A person touching or close to an object struck by lightning may be affected by a side-flash, or receive a shock due to step, touch or transferred potentials.
All parts below the lowest test link in a downconductor are included.
AS / NZS Lightning Protection – AG – Australian Business Licence and Information Service
As a result, people may be injured in the panic to evacuate the building. The worst situation would arise when a person is struck on the head, in which case the current through the body could cause fatal injuries to the brain, the heart and the lungs. Persons within a substantial structure are normally protected from direct strikes, but may be exposed to a hazard from conductive electrical services entering the structure or from conductive objects within the structure that may attain different potentials.
Incoming nnzs electrical service lines add to the lightning collection area as they can conduct lightning current into the building. For telecommunication overvoltages, AS For more frequent listings or notification of revisions, amendments and withdrawals, Standards Australia and Standards New Zealand offer a number of update options.
Do not enter the water, and in general avoid contact with water. In general, it is not economically possible to provide total protection against all the possible 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.
Conventional fabric tents offer no protection; small sheds offer uncertain protection. Lightning can cause damage to all or part of a structure or to the contents of a structure, especially to electrical and electronic systems.
A less dangerous situation is where the person is subjected to step or touch potentials, and only a small fraction of the total current passes through the body, although the pathway taken by this fraction is still important.