lightning protection methodsmsci world ticker

Lightning Protection Methods What type of lightning protection methods can be used for human and structures? The caption reads: “Lightning protection provides safety.” Foreword OBO Bettermann is one of the world’s most experi-enced manufacturers of lightning and surge protec-tion systems. The distance between two down conductors is between 10 and 20 meters according to lightning protection level required.The largest part of lightning current is conducted and dissipated through the conductors and earthing systems closest to the point of impact of the lightning strike.Protection of an external explosive storage area by a catenary wire lightning conductorThis lightning protection system, using a similar principle to that of the mesh cage, consists of a mesh of conductors, but at a distance from the structure to be protected. These then conduct and dissipate the lightning current into the ground. The mesh size can be selected between 4 and 16 meters according to the types of protection required for the building. Lower and higher values cannot be assumed and evaluated as ESE in any means.

The mesh size is between 5 and 20 meters according to the effectiveness required.The top of the down conductors fitted to the walls are connected to the roof mesh, and the bottom to dedicated earthing systems.
There are different methods of lightning protection systems. The principle consists in creating one or more preferred impact points for a lightning strike using low impedance, conductor elements. If the height values of  the parts of the structure/building differ from each other significantly, the lowest attractor/conductor unit should be connected to down-conductors of the highest parts in addition with its own down-conductor pieces.
Such a network of conductors are followed by an external perimeter down the to ground.

These types of lightning terminals can be assumed as more technological and modern types than conventional types.

In a nutshell, there can be listed four types of lightning protection/prevention systems for protecting structures and human being against lightning:       First known lightning protection systems in modern means were originally invented by President Benjamin Franklin in 1753. When a building structure is equipped with a lightning protection system, the destructive power of the lightning strike is directed safely into the ground, leaving the … This coherent system enables the lightning to be captured and dissipated whilst providing protection to the structure. A lightning protection system performs a simple task. Afterwards these parts conduct and transfer the high lightning currents into the ground at the safest way. This installed cage obtains many attractors (arresters) created by conductors completed by X-axis way connections then these are to be connected to a following grounding system.

These elements must comply with thickness, cross-section and continuity requirements, thus making their use a difficult matter.The principle of an early streamer emission lightning conductor is to artificially generate, with the aid of an ionization device, an early upward leader occurring before the other «natural» upward leaders, in order to establish a privileged impact point of the lightning strike.Protection of an industrial site using an early streamer emission air terminal:Because the capture of a lightning strike is quicker than with a lightning rod, this technology can be used to protect zones spread over a wider area, thus ensuring the protection of large structures.The protection radius generated depends on the lightning conductor's triggering advance value (Δt in μs), its height and the effectiveness of the protection, the maximum value being 120 metres (Level III, height = 60 metres). For the protection radius of such type of Lightning air protection rod was very strick up to 30 meters meter in radii means. Development of existing lightning protection standards, in the U.S. as well as internationally derive from the same scientific sources.

Such a coherent system enables the lightning strike to be arrested and transferred while providing maximum protection to the structure and human beings as well. Every metal parts on the roof or the top area that are connected to the grounding whether it is on purpose or unintentionally, should be connected to the this conducting system. Approximately one-third of all tank fires are known to be caused by lightning (several more, are most likely due to lightning, but never reported).

The aim is to avoid the lightning current coming directly into contact with the structure.Catenary wire conductors placed above the structure to be protected are connected to This protection requires that additional mechanical studies (resistance of materials for masts, qualifying ground pressure, resistance to wind and weather condition, etc.)

In NFC 17-102/2011 ESE Standard, projected DeltaT values of ESEs are stated from 10 to 60 microseconds.

earthing screen and over-head earth wire are very suitable for protecting an electrical power system from directed lightning strokes but system from directed lightning strokes but these methods cannot provide any protection against high voltage travelling wave which may propagate through the line to the equipment of the sub-station.

Lightning Protection Blog.

Fires involving petroleum storage tanks are far more common than one might think. They can be tested manually or remotely thanks to their remote testing opportunities.

This network is completed with transverse elements. Early Streaming capacity of an standard ESE can be measured with it is DeltaT( value. For more information about ESE lightning protection logic please        ESEs perform their duties in a specific area determined by its DeltaT value, rather than protecting only one building or a structure. Top parts of the down conductors are linked to the walls and size afterwards they are connected to the meshed parts of the roofs then finally  to the bottom earthing systems for safe grounding of electricity. Thus, there can be found a continuous and constant linked-conductor way from the parts located in the top of the structure, including the grounding materials, to the earhing unit. It provides a specified path on which lightning can travel.

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