Progress constantly moves and daily presents its consumers with new, more perfect products that improve the quality of life of a person. Innovative technologies also did not bypass the lightning protection system, offering an improved version of the one that was released earlier.
What is designed for?
Lightning is the strongest electrical discharge, formed between the earth and clouds due to the difference in potentials of atmospheric and ground balance. Such a blow brings a considerable threat and quite badly damages the structures. In the 18th century, scientists presented a device that helps to save property and life, which is still relevant today.
Active lightning protection is invented for comfort and safety. Correctly installed device will perfectly help to save not only the house, but also all electronic assistants.
This design is a series of measures and technical measures designed to ensure the reliability of all buildings and the lives of people who are there in the discharge.
Principle of operation
Any active lightning protection system is assembled according to one scheme, the main elements of which are:
- current leads - they are used to output current from the receiver directly to the ground loop;
- lightning receiver - this device takes on a spontaneous discharge;
- the grounding circuit is a buried structure in the ground, through it the energy without harm to the surrounding is sent to the ground.
All these components are made of metal and are joined together by welding. For receivers, it is preferable to use rods, current leads are made of wire, and the contour is made of strips and pins.
During a thunderstorm above the ground a strong electric field is formed, with which active lightning protection fights. The principle of the device is to concentrate a strong voltage at the points, resulting in a so-called corona discharge around it. Thanks to such a system, induced electrical discharges are not generated in a protected building, as a result, a shock does not occur. If such a natural phenomenon does manifest itself, which is extremely rare, then all the accumulated energy will be directed through the metal pin into the ground along the branches.
Active lightning protection
Such devices appeared not so long ago, but they are already used almost everywhere. The main difference between these devices and all others is the use of the principle of electromagnetic induction in a more complicated version.
Instead of a simple cable or a pin, a module is mounted, which is composed of a spark gap, an individual coil and a capacitor. Such a device is received because it independently during the thunderstorm affects the electric field, which is formed around. As a result, the discharging discharge will strike directly into the trap itself in a variety of circumstances and leave to the ground.
There are certain advantages, thanks to which active lightning protection is very popular in the modern market.
- Such a receiver can cover a significant area, in contrast to all the predecessors, which are already obsolete, while protecting the area to thirty-six thousand square meters.
- Easy operation and installation.
- Thanks to a neat appearance, the system fits perfectly into the overall style and architecture of the buildings.
- Long and reliable service life.
- Uncomplicated care and maintenance.
Passive lightning protection
This complex is considered a classic, as a receiver which uses metal elements, such as rope, pins, mesh and wires. The combination of these elements is most often used. Initially, the protection is set on the protrusions and angles, and if the area is flat, then laid out a metal mesh. It should also be noted that in such a system it is necessary to pay special attention to norms and standards. For example, if you install only one receiver on the chimney, it will not save anything more. Therefore, you need to adhere to the minimums that are set in the documentation.
The main differences between active and passive protection
In order to mount passive protection, you need a lot more materials than with the active one. In particular, it will be felt by those who have different geometry of the roof. For the latter, the structure of the house does not matter, the calculation is very easy and simple.
There is also a significant difference in price ranges. It is very important to understand what device is suitable for a certain area. Passive will be an excellent option for securing a small house in the country or in the village. Active protection is mounted on houses of sufficiently large sizes, with extensions and roofs of various geometries. Install the first system, of course, also possible, but this will require much more materials and money. At the same time, the efficiency will be much lower. Despite all the differences, active and passive lightning protection have the right to life, and only the user chooses the best for himself.
The installation of such elements on the roof is carried out in accordance with the standards "Instructions for the installation of lightning protection of buildings, structures and industrial communications," which was approved by the Ministry of Energy of Russia on 30.06.2003. Order N 260.
The main set of tools includes devices to protect against direct lightning strikes (external) and secondary impact (internal). The selection of the required type and distribution of components is carried out by special firms, carrying out on the computer a project of active lightning protection. Dwg format is great for saving all the necessary data. Installing new equipment, you need to clearly adhere to the documentation, as in it, employees of companies calculated all the parameters and necessary measurements, thanks to which you can safely keep the housing complexes.
Such active lightning protection is one of the leaders deserving a qualitative assessment from users, has a number of main advantages, which include:
- Great efficiency. All objects covered by the so-called capsule are under protection, including decorative roof elements and television antennas. The presence of a short path of current flow between the earth and the head of the lightning rod minimizes the risk of fire, which often occurs at atmospheric discharge into the roof of the building and the induction of serious stress in the conductors of metal pipes, which can lead to people injury, as well as the explosion of gas emerging from the pipes.
- Simplicity and cost of installation. Active lightning protection "Gromostar" has a wide range of coverage. Most often it will be enough to mount the tap head correctly on the mast, which can serve as an antenna at the same time. If there is a security zone on the freestanding mast, it often fills up several objects at the same time. Therefore, you can save about twice as much money with this device.
Active lightning protection "Forend" is based on the use of a difference of potentials, which are formed between the surface of the earth and a thundercloud. At the moment when the electric field reaches a critical value, the forward emission begins to emanate from the receiver, directed toward the discharge. And in case of occurrence of a natural phenomenon over a protected area, it will necessarily be caught by the receiver and transferred to the ground. Thus, there is a reliable protection of all objects and structures. This function can be attributed to the main advantages of the device.
The protection radius of the device reaches 107 m, thereby exceeding the coverage of all other types of receivers. This is all achieved thanks to the implemented function of using warning digits.
The protection zone of such equipment has a very good coverage area and allows to close up to 36 thousand square meters. m, and with a more accurate reliability of up to 107 m. If it is necessary to protect buildings more clearly, it is possible to simultaneously use several apparatuses together with the components attached to them by grounding.
Active lightning protection Forend has one more important advantage, namely, economy. It is an alternative to the use of devices for the protection of large rooms without the introduction of the method of protective mesh.
In the case of using a passive system, there will be a need to lay a large amount of metal with certain descents and earthing switches, which in the end slightly reduces the reliability of the entire structure. In addition, the use of such a device does not exclude the possibility of its rupture, as a result of which the protection circuit is completely broken.
And the Forend system is weatherproof and is considered very easy to install. The earthing is easy to manufacture and does not need to dig trenches around the perimeter of the entire building, unfolding the current leads, which in turn is mandatory in case of using passive devices.
The reliability of the equipment of this company is confirmed by the certificates of tests of the laboratory "BET" (Germany) and the Romanian National Institute of Research. Also approved for use by the Federal Service for Technological, Ecological and Nuclear Supervision "Rostekhnadzor".