What is the British standard for lightning protection?
IEC/BS EN 62305-3
IEC/BS EN 62305-3 provides the requirements for the protection of a structure against physical damage, by means of a lightning protection system, and for protection against injury to living beings due to touch and step voltages, in the vicinity of an LPS.
What is Type A and Type B earthing?
There are three types of LPS Earthing systems types A, B and Foundation Earth Electrodes. Type A – The conventional LPS Earthing system using. vertical or horizontal electrodes such as. copperbond Earth rods or copper tape. Type B – The ring electrode sited around the periphery of the structure.
What is lightning protection level?
LPL refers to the case of maximum surge current, based on the 10/350μs pulse current waveform, which is applied to the case of Type I protectors used in power entry level into a building.
What is the Indian standard for lightning arrestor?
IEC 62305
Bureau of Indian Standards has adopted IEC 62305 as Indian Standard in December 2015, which means it is IS/IEC 62305 and replaces IS 2309 Code of practice for the protection of buildings and allied structures against lightning.
Is lightning protection a legal requirement in UK?
Although lightning protection is not a legal requirement, insurance companies may require churches and prominent historic buildings to have lightning and surge protection. This guidance provides advice on the design of new or improved lightning protection and surge protection systems.
Is it a legal requirement to have lightning protection?
According to RC 35 ‘Protection of buildings against lightning strikes’, a risk control publication, it is not a legal requirement for all buildings and structures to have lightning protection.
What is Type B earthing?
Type B Earthing or Ring Earthing forms a perimeter around the structure. Ring Earthing should: be a closed ring of conductors If it is not possible to close the ring, a connection must be made inside the building using conductive metallic equipment such as pipes. be at least 0.5m below the surface.
What is structure earthing?
Foundation earthing is done using metal components used in construction of the building. Foundation earthing serves the purpose like safety, functional and lightning protection. This is the most efficient earthing system to protect electronic equipment.
How do you calculate lightning protection?
Length of Building (L) = 60 Meter. Width of Building ( W ) = 28 Meter. Height of Building (H) = 23 Meter….Calculate Lightning Protection for Building / Structure.
| Reference Table As per IS:2309 | |
|---|---|
| Thunder Storm Days / Year | Lightning Flash Density (Flashes to Ground /km2/year) |
| 5 | 0.2 |
| 10 | 0.5 |
| 20 | 1.1 |
How many types of lightning protection systems are there?
The Conventional Lightning Protection System includes (2) different types as follows: Franklin Rod LPS, Franklin/Faraday Cage LPS.
How do you choose a lightning arrester?
How to select a lightning arrestor
- It must have satisfactory service life when connected to the power system.
- Minimum rated arrester must be preferred because it provides the greatest margin of protection.
What’s new in BS EN 62305 series?
BS EN 62305 series now treats the aspect of internal protection (lightning current and overvoltage protection) as an important and integral part of the standard and devotes Part 4 to this issue.
What is the difference between BS 6651 and BS 62305?
The British Standard European Norm (BS EN) 62305 Series consists of four distinct parts, under the general title “Protection against lightning”. These four parts constitute a much more thorough view on protection against lightning, when assessed against the previous Standard BS 6651.
What is the single risk assessment in BS EN/IEC 62305?
However, the single risk assessment in BS EN/IEC 62305 dictates whether structural and/or LEMP protection is required hence structural lightning protection cannot now be considered in isolation from transient overvoltage protection – known as Surge Protective Devices (SPDs) within this new standard.
What is flash density BS EN 62305?
BS EN 62305-2 Risk management Flash density Clearly, the amount of local lightning activity is of paramount importance when assessing the risk to a structure. Flash density is the measure of the number of lightning flashes to earth per square kilometre, per annum, the higher the number the greater the lightning activity.