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Mitigation of the damage as a result of a direct lightning protection equipment strike on distribution lines or any metallic structures is generally accomplished using shield air conductors above the structures or grounded air terminals.

Although the lightning protection equipment of down-line equipment are not mitigated by this type of solution, the propagation effects throughout the facility are minimized.

This type of event can damage sensitive equipment within a facility several miles from the strike itself, depending on the protection fail safes and grounding equipment that has been installed.

Lightning rod

The maximum distance that each step may travel is called the critical distance and is proportional to the electric current. Objects are likely to be struck if they are nearer lightning protection equipment the leader than this critical lightning protection equipment.

Locations that are considered safe from lightning can be determined by imagining a leader's potential paths as a sphere that travels from the cloud to the ground.

For lightning protection, it suffices to consider all possible spheres as they touch potential strike points. To determine strike points, consider lightning protection equipment sphere rolling over the terrain. At each point, a potential leader position is simulated. Lightning is most likely to strike where the sphere touches the ground.

Industrial Lightning Protection Systems and Devices

Points that the sphere cannot roll across and touch are safest from lightning. Lightning protectors should be placed where they will prevent the sphere from touching a structure. A weak point in most lightning diversion systems is in transporting lightning protection equipment captured discharge from the lightning rod to the ground, though.


During the period of political confrontation between Britain and lightning protection equipment American colonies, British scientists maintained that a lightning rod should have a ball on its end, while American scientists maintained that there should be a point.

As of [update]the controversy had not been completely resolved.

Lightning Protection Devices | LoveToKnow

Mooreet al. As a result, round-tipped rods are installed on most new systems in the United States, lightning protection equipment most existing systems still have pointed rods. According to the study, [c]alculations of the relative strengths of the electric fields above similarly exposed sharp and blunt rods show that while the fields are much stronger at the tip of a sharp rod prior to any emissions, they decrease more rapidly lightning protection equipment distance.


As a result, at a few centimeters above the tip of a mm-diameter blunt rod, the strength of the field is greater than over an otherwise similar, sharper lightning protection equipment of the same height. The results of this study suggest that moderately blunt metal rods with tip height to tip radius of curvature ratios of about Lightning protection equipment addition, the height of the lightning protector relative to the structure to be protected and the Earth itself will have an effect.

This is done by transferring electric charge such as from the nearby Earth to the sky or vice versa. It is noted that pointed objects will indeed transfer charge to the lightning protection equipment atmosphere [29] [30] and that a considerable electric current can be measured through the conductors as ionization occurs at the point when an electric field is present, such as happens when thunderclouds are overhead.

The NFPA Standards Council, following a request for a project to address Dissipation Array[tm] Systems and Charge Transfer Systems, denied the request to begin forming standards on such technology though the Council did not foreclose on future standards development after reliable sources demonstrating the validity of the basic technology and science were submitted.

How lightning protection systems work

At first, small lightning protection equipment of radioactive isotopes radium or americium were used as sources of lightning protection equipment [32] between andlater replaced with various electrical and electronic devices. According to an early patent, since most lightning protectors' ground potentials are elevated, the path distance from the source to the elevated ground point will be shorter, creating a stronger field measured in volts per unit distance and that structure will be more prone to ionization and breakdown.

If a structure is hit, the lightning will pass through other materials before reaching the conductive material.