How do I choose lightning protection level?

How do you determine 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 class of lightning protection system?

Classes of LPS I, II, III and IV are defined as a set of construction rules based on the corresponding lightning protection level (LPL). Each set comprises level-dependent (e.g. radius of the rolling sphere, mesh size) and level-independent construction rules (e.g. cross-sections, materials).

Is standard for lightning protection?

IEC 62305 – Protection Against Lightning, is the apex level document that informs the standards for lightning protection around the world. … The IEC 62305 standard covers the regulations required for the protection of equipment and structures from the effects of both direct and indirect lightning strikes.

What is the British standard for lightning protection?

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.

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How often should lightning protection systems be tested?

Test & Inspection

It is important that all lightning protection systems should be tested by a specialist at least every 12 months but we always recommend testing is carried out every 11 months.

What is impulse ratio?

The ratio of the flashover, sparkover or breakdown voltage of an impulse to the crest value of the power-frequency flashover, sparkover or breakdown voltage.

What is external lightning protection system?

It is a protection system that does not perform any prior action to lightning strike, its functionality is executed when lightning strikes the structure in charge of driving and dissipate the energy of lightning to the ground. It is the system comprising: Franklin lightning rods. Capture meshes.

What is the minimum diameter for a ground rod used in lighting protection?

The grounding electrode shall be made of a rod of not less than 12.5 mm in diameter, and 203 mm in length and be of copper-clad steel, solid copper, or stainless steel. It shall not be resistant to any corrosive condition existing at the installation or be suitably protected against corrosion.

What is the Indian standard for lightning arrestor?

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.

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Is IEC 62305 based lightning protection system?

Lightning Protection System (LPS)

BS EN/IEC 62305-1 has defined four Lightning Protection Levels (LPLs) based on probable minimum and maximum lightning currents.

What is the height of building lightning protection?

(Right) Towers taller than 30 metres provide protection for an area 30 metres high and 60 metres wide. The protected zone is in the shape of an inverted funnel with inward-curving sides. Towers between 15 and 30 metres high create protected zones of similar shape but with height and width equal to tower height.