Protection from thunderstorms and lightning

By Admin | Electrical Light
27 April 2016
Meanwhile, protect your home and yourself from such an unpredictable natural phenomenon is quite real - enough to buy a special engineering systems and install it correctly.And then, no storm will be terrible.

One possible reason for neglect of our compatriots to this issue lies in the fact that the building codes do not consider mandatory lightning protection of buildings of less than 30m in height.In addition, many people are used to hope for the best, convincing myself that the probability of getting an electric discharge at their vacation home is practically zero.However, the lightning is able to cause very serious damage, even if it hit a few dozen meters from the house.In addition to the serious health risks it hosts a fire in a residential and technical rooms, the failure of expensive computers, video surveillance systems, utilities and so forth.

Therefore, the most advanced gardeners and owners of houses prefer not to risk and establish a protective system - external (to protect the buildingli
ghtning) or internal (in order to protect areas of the house from the secondary effects of electrical discharge).External protection, in turn, is divided into classical and active.Each variety has its own characteristics.

Classical lightning protection system

Other names classic external lightning protection system, open in the XVIII century American statesman Benjamin Franklin, - passive and mechanical.It consists of three interconnected elements: air terminal, the collector and grounding.

Lightning (lightning rod, lightning rod), assumes an electric shock, make a rope, nets, pounced on the building, but more often - in the form of a steel pin with a diameter of about 12mm and a length of 0,2-1,5m.It is mounted on a special insulating struts fastened to the highest point of the roof.

By Lightning welded collector (descent) - conductor of round or flat steel with corrosion-resistant zinc coating.The connection must be durable and reliable, able to withstand very high current power - about 200 kA.Then, the collector is lowered from the roof by attaching to the wall of the building with special metal clips.

second end thereof is firmly welded to the grounding - metal rods, profile sections, sheets, tubes, or the whole system of corners, bars and channels that are buried in the ground to a depth of 2-3 m and quenched with electrical discharge.The collector is better to lay on the back wall of the building, and earthing - to dig out of the foundation of the house and outbuildings.

The main advantages of the classical version of lightning - the reliability and affordable price, feasible for the majority of the owners of suburban real estate.The downside is not too attractive appearance: steel reinforcement does not fit well into the architectural appearance of the building.

external active lightning protection system

relatively new for our country's active external lightning protection system has been recognized experts and attracted the attention of consumers.From classic, it is more breadth, caused another principle of action of a lightning rod.This item is not idle, waiting for a direct lightning strike and is constantly working - ionizes the air space around itself, thereby forming a vast area of ​​active protection.As a result of thunderstorm electrical discharge caused anywhere in this area, be sure to be attracted to the receiver antenna on the roof, will be held on the current collector and safely grounded.

Pros: such systems are capable of protecting buildings from lightning a large area, are characterized by high reliability, durability, ecological compatibility.In addition, they are compact and lightning do not spoil the appearance of the building.But the active device has one major drawback - the high price.Therefore, their installation can afford not all.

Systems of internal lightning cottage

It is equally important to take care of the installation of the internal lightning protection of the cottage or villa - it protects household goods equipment from secondary effects of thunderstorms: hazardous effects of electromagnetic fields and power surges in the electrical network, which could seriously damage the wires, engineeringCommunication buildings and modern equipment (computers, audio and video players, television sets, video surveillance systems, heating and air conditioning).

The structure of such systems include surge suppressors, or lightning protectors installed in the house in a special water-distribution board.Their basis - semiconductor resistor that changes its resistance depending on the voltage applied to him and his shock at the time of lightning completely burn out (and then they are simply replaced by new ones).In addition, there are one-off and more expensive reusable restraints, self-healing after discharge.

The elements of the internal system of the device also include surge protection (SPD).They protect expensive home appliances from the ravages of the induced voltage caused by the storm.

In addition, the internal lightning protection allows you to equalize the potentials of individual consumers.To do this, all collectors connected to a grounding bus, or induced voltage itself will strive to do the same, but with irreversible consequences for household appliances.

your choice

Today in the domestic market a wide range of variety of lightning protection systems.How to understand what the system is optimal for a particular house or cottage?

Firstly, it should be based on the location of the building and the surrounding natural environment.If the house is, for example, is in the forest, in the valley where the lightning is rare, it is possible to do a simplified version of protection - for example, to install a lightning rod on the highest tree growing nearby.It will take the brunt of the storm, and a grounding collector negate the risk of fire.If the building is located on an open elevated terrain, it is impossible to save on lightning - it makes sense to install both internal and external (preferably active) system.

Secondly, it is necessary to consult with professionals and listen to all their recommendations.After installation of lightning protection systems - rather laborious and demanding job requiring prior calculation and design.If you take up the matter on their own, without proper knowledge, mounted equipment not only protects the house during the storm, but also become a potential source of danger.Contractors to perform the work is best to choose on the advice of friends or to focus on the experience of companies, the recommendations of its clients (which can be found on the Internet), and the technical level of equipment offered by the company.Any self-respecting company before mounting project being developed lightning.If the installation is done by eye, without any preliminary calculations, the services of such a company it makes sense to refuse.