Lap health hazard. Sanitary zone of the power line. Influence of electromagnetic fields on a person. What does the regulation say

In the 60s, specialists in Russia paid attention to the electromagnetic fields of power lines (TL). After long and in-depth studies on the health of people who have contact with power lines at work, the results of these studies showed that persons long time were in the electromagnetic field, more often complained of weakness, irritability, fatigue, memory loss and sleep disturbance.

Currently, there are many problems associated with prolonged exposure to power lines on the nervous system, cardiovascular, immune and reproductive systems.

Power line(TL) - one of the components of the electrical network, a system of power equipment designed to transmit electricity through electric current.

The wires of a working power line create electric and magnetic fields of industrial frequency in the adjacent space. The distance to which these fields propagate from the wires of the line reaches tens of meters.

Within the sanitary protection zone of power lines it is prohibited:

place residential and public buildings and structures;

arrange areas for parking and stopping all types of transport;

to locate car service enterprises and warehouses for oil and oil products;

carry out operations with fuel, repair machines and mechanisms.

SanPiN №2971-84

And now what is happening in reality:

One of the most powerful electromagnetic wave exciters is industrial frequency currents (50 Hz). Yes, tension electric field directly under the power line can reach several thousand volts per meter soil, although due to the property of reducing the tension by the soil, already at a distance of 100 m from the line, the tension drops sharply to several tens of volts per meter.

Studies of the biological effects of the electric field found that already at a tension of 1 kV / m, it has adverse effect on the human nervous system, which in turn leads to disorders of the endocrine apparatus and metabolism in the body (copper, zinc, iron and cobalt), disrupts physiological functions: heart rate, blood pressure, brain activity, metabolic processes and immune activity.

As for electricians and other power line workers, the situation is even worse.

The power transmission line personnel had visual impairments, changes in color perception, narrowing of visual fields in green, red, and especially blue color, vascular changes in the retina. Studies have been conducted of professionals working 8 hours a day in contact with AMY. Some have experienced a decrease in sex drive, a tendency to depression and irritability. noted reduced amount lymphocytes in the blood.

See what happens to the biofield of a person living near power lines:

Human biofield- this is its electromagnetic field, that is, the totality of the radiation of each cell of our body. In fact, it is possessed by any object on Earth, any living organism.

Our electromagnetic field was formed under the influence of the Earth's electromagnetic field. And since today's electromagnetic background is tens of thousands of times higher than natural, our field cannot withstand such an onslaught.

If other sources of radiation, much more powerful than the radiation of our body, begin to act on our electromagnetic field, then chaos begins in the body. This leads to a drastic deterioration in health.

From an energetic point of view, the biofield performs a protective function. It is also called an aura. In fact, this is the first protective barrier.

Fig. 1 - Normal human biofield. A person has protection from electromagnetic radiation

Rice. 2 - The biofield of a person living near power lines and in

Data:

One of the largest studies of this issue took place in England and Wales from 1962 to 1995.

Medical records of more than 29,000 children under 15 were reviewed

It turned out that the risk of leukemia in children who lived from birth at a distance of up to 200 meters from power lines is 70%, and from 200 to 600 m - 20%.

Statistical data showed that power lines have a significant negative impact.

“Our study shows that about 5 out of 400 cases of childhood leukemia can be associated with high-voltage lines, which is about 1% of cases,” said Gerald Draper, head of the research team at the University of Oxford.

The works of V. N. Anisimov cite the facts of Swedish scientists:

They analyzed data on the incidence of cancer among people living in close proximity to high-voltage power lines (at a distance less than 300 m).

In a group of 400 thousand. person was found 142 children With various types malignant neoplasms and 548 adults with a brain tumor or leukemia.

Also, a survey was conducted on the subject of reproductive function in 542 workers substations power lines. This analysis revealed such pathologies as:
1) an increase in the number of congenital malformations if the father worked at a power plant;
2) decrease in the function of fertilization among a part of male workers
3) the birth rate of boys has decreased.

Was also examined youth group under 18 living and within 150 m from substations, transformers, metro, railway power lines and power lines. They were twice as likely to have disorders nervous system and leukemia.

In Denmark, 1707 children under the age of 16 were examined during the period. Due to living near power lines, some have developed brain tumors, leukemia.

Protection against electromagnetic fields of power lines:

And what to do??

We understand that if a power line is built near your house, you cannot move it. And not everyone can afford to move today.

And even if you don’t live near power lines, then, believe me, they make a very good contribution to the general electromagnetic background of the city in which you live anyway.

Today, there is already a reliable protection against electromagnetic fields and their torsion components.

This must be done because the situation concerns your health and the health of your entire family. Especially if you are young and just planning it, or you have small children.

High-voltage power lines cause concern for people living near them. Many people notice that after a long stay under power lines, their health deteriorates. There is an opinion that harmful electromagnetic waves change brain cells, disrupt the functioning of the whole organism and even cause cancer. But is it really harmful to live near power lines and what is the opinion of experts on this matter? Danger of power lines: myth or reality? From high voltage lines, as well as from electrical appliances and wiring, 2 types of radiation come out - variable waves and static fields. For example, you can take a socket with a voltage of 220 to 240 volts, located 1 meter from a person, and a power line with a voltage of 200 kilovolts, installed 30 meters from a residential building. The strength of the static field decreases with distance. Therefore, the outlet and the power line will have approximately the same effect on people. As for the variable waves, they decay more weakly, because their strength is directly proportional to the distance from the energy source. If we take similar distances, then a power line with a voltage of 6.5 kilovolts will become the equivalent of an outlet. Moreover, in an apartment, in a country house or in an office building, many sockets are installed, there is also electrical wiring and various devices powered by current. Together, for a person, their radiation is much more harmful than the waves emanating from power lines. There is no information that absolutely confirms that it is dangerous to live near a high-voltage line. This topic has not been fully explored. But there is an opinion that in people living near power lines, the latter causes a violation in the functioning of internal organs. But the frequency of industrial current is 50 Hz, and the human body is affected by frequencies that are much lower. But people working with high voltage, noted that after a long presence near power lines, harmful effects they still showed up. Most people have identified the following symptoms: 1. constant malaise; 2.weakening of immunity; 3.nervousness. This is probably due to the complexity of the profession, which requires a high concentration of attention and constant composure. Scientists note that each person has a different degree of perception of power electric and magnetic fields and static radiation from power lines. The painful condition caused by the negative effects of power lines is called "electrical allergy". In some countries, a person with such a disease has the right to move to an area far from power lines. Moreover, financial expenses and the search for housing are carried out by government bodies. So, people of a lonely age living in a house located near power lines can be exposed to their negative impact to varying degrees. One person will constantly feel the results harmful influence power lines, and the health of the other will remain unchanged. What are the consequences of living near a high voltage line? Presumably, a power line located where a dacha, apartment, office or other premises where people are often located can be detrimental to their health. The danger of harmful radiation lies in the appearance of chronic fatigue syndrome in a person, weakened immunity and increased irritability. Indirect evidence of this is the results of studies conducted at the Karolinska Institute in the United States. Scientists have found that prolonged exposure to electromagnetic fields increases the risk of developing cancer, diseases of the heart and blood vessels, worsens reproductive function and contributes to depression. The researchers were able to study the theory of harm to power lines, thanks to the participation in the experiment of several thousand people whose life passes near high-voltage lines. Although the exact causes of the negative effects of electromagnetic fields could not be clarified. But scientists suggest that power lines ionize dust particles hovering next to them, and then penetrating into human lungs. In the respiratory organs, ions charge the cells, which disrupts their work. Of course, with a long stay in a place where there is a high-voltage line, every person will learn about its harmful effects. This "unfavorable neighborhood" increases the likelihood of oncological diseases and disrupts the functioning of many body systems: 1. nervous; 2. sexual; 3. immune; 4. endocrine; 5. hematological; 6. cardiovascular. Harmful power lines are especially dangerous for pregnant women, children, allergy sufferers and people with central nervous system diseases and immunodeficiency. This is confirmed by the reviews of people who have worked in the zone of electromagnetic radiation for more than a year. They noted that they had severe headaches, hypertension, and visual impairment. And men young age who had no previous heart problems often have a heart attack. How to understand if power lines pose a health hazard? How can a person living near high-voltage lines independently determine the degree of influence of electromagnetic fields on the body? It was said above that the transmission distance of a harmful magnetic field is determined by the power of the power transmission line. Knowing the necessary information, even on the wires, you can approximately determine the voltage class of the power line. This will tell you the number of wires in the "bundle" (phase). So, where 4 wires power is 750 kilowatts, 3 - 500 kV, 2 - 330 kV, 1 - less than 330 kV. To set the class, you need to know the number of insulators in the string. 220 VK - 10-15 pieces, 35 kV - 3-5 pieces, 110 kV - 6-8 pieces, 10 kV - 1 insulator. To protect people from the effects of magnetic fields, referring to the power of power lines, sanitary protection zones are established from the projection of a distant wire. Below is a list that indicates the voltage of the power transmission line and the size of the zone in meters: 1. 750 kV - 40 m; 2. 300-500 kV - 30 m; 3. 150-220 kV - 25 m; 4. 110 kV - 20 m; 5. 35 kV - 15 m; 6. up to 20 kV - 10 m. However, in this table, the standards for Moscow are established. But in some cases, it is precisely such regulations that are used when allocating plots for development. Although the above sanitary norms were determined without taking into account the effect of the magnetic field. But today, all over the world they are talking about even more harm than from electrical radiation. And in Russia and the countries of the former CIS there is no such thing as the level of magnetic fields, and it is not standardized at all. Therefore, before buying a summer house, a house or an apartment near power lines, it is worth inviting an ecologist to conduct a study. Experts will check and give an official opinion, legally confirmed. also in major cities, such as Moscow, you can use the services of specialists from the Association of Independent Laboratories who will conduct a professional environmental assessment. For those who want to completely protect themselves from the negative effects of magnetic fields, the researchers recommend increasing the norm of the sanitary protection zone by a factor of ten. So, 100 meters is quite enough so that the human body is not affected by a weak power line. And if the property that is disintegrating near high-voltage lines has already been bought, and there is no way to sell it, then you definitely need to call in specialists who can determine the degree of potential danger. Although before today there is no official data on the safety of power lines, their negative impact should not be denied. After all, the majority of people living or working near power lines noted that every year their health worsens. Therefore, those who are often exposed to electromagnetic radiation need to periodically rest in ecologically clean areas - outside the city, in the forest, in the mountains or at sea.

A modern person is constantly under the influence of a huge number of electromagnetic fields, in a very wide frequency range - these are electromagnetic fields of power lines, and EMF created by a wide variety of office and household appliances, and radio waves mobile phones located in close proximity to the speaker's brain. It is calculated that if we sum up the electromagnetic fields from all devices on Earth created by man, then their level will exceed the level of the natural geomagnetic field of the Earth by millions of times. In our time, a connection has been established between the resonant frequency and the concentration of ions in the cell, which explains the violation of metabolic processes in the human body when exposed to radiation.

Studies of the impact of electromagnetic waves of overhead lines on the brain and the human body as a whole have proven that it can lead to a number of diseases: radio wave, an increase in the number of leukocytes, changes in heart rate and blood pressure. Sometimes, as a result of exposure to radiation from power lines, disturbances occur at the cellular level. The negative impact of the electromagnetic fields of power lines on a person and on certain components of ecosystems is directly proportional to the power of the field and the exposure time.

To answer the question "How many meters from power lines can you live and where to build a house?" let's look at the regulations. There is a document regulating the size of the safe zones of power lines "Sanitary norms and rules for protecting the population from the effects of an electric field created by overhead lines (VL) of industrial frequency alternating current power transmission" (approved by the Deputy Chief State Sanitary Doctor of the USSR on February 28, 1984 N 2971-84 )

According to the sanitary standards of power lines, in order to ensure the safety of life from the effects of EMF (electromagnetic field), sanitary protection zones of power lines are established along the wires of high-voltage lines, in which it is unsafe to live near power lines. The size of the zones near power lines depends on the voltage class.
The safe distance to the high-voltage line is the territory along the wires of the power transmission towers, in which the electric field strength does not exceed a life-safe value of about 1 kV / m. The distance of impact of a high-voltage power line on human life is directly proportional to the power of the line itself.
During the construction of a residential building, a garage, a fence and other structures, it is allowed to take the boundaries of sanitary protection zones along the overhead line wire at the following distances from the projection onto the ground of the extreme phase wires of the overhead line support in the direction perpendicular to the overhead line. You must also ensure the possibility of servicing the power grid: the standard distance from the electric pole to the fence cannot be less than the security zone of the power line, it is forbidden to attach the fence to the pole, build a house under power lines, and plant trees under power lines.

Sanitary zones of power lines in accordance with SN No. 2971-84

The safe distance from the 110 kV transmission line is about 20m; at an overhead line voltage of 500 kV, the norm of the distance from the power line is about 30 m; at a voltage of 750 kV - the norm is 40m; and at a voltage of 1150 kV - 55m is considered a safe distance from power lines. The width of the right of way is determined by multiplying the values ​​​​of the safe distances from the power line presented in the table by two. quite simple on its own - you need to pay attention to the number of wires in the bundle of one phase of the overhead line support. So: 2 wires - near the 330 kV power line, 3 wires - next to the 500 kV line, 4 wires - 750 kV. The lower voltage class of the overhead line is determined by the number of insulators: about 3-5 insulators - a 35 kV line, 6-8 insulators - 110 kV, 15 insulators - 220 kV.

During the construction of a residential building near power lines, the electric field strength of power lines can be reduced by:
- removal of a residential building to a safe distance from overhead lines;
- the use of shielding devices to protect housing near power lines and other means of reducing the electric field strength near power lines.

At a close distance from the power line to a residential building, a grounded roof made of corrugated board or metal tiles, a reinforcing mesh inside the walls of the building are well protected (therefore, reinforced concrete walls are the safest from the influence of power lines and best attenuate radio waves). But the roof of the building and the grid must be reliably grounded with a small distance from the wire to the roof.

Permissible distances from overhead lines to various objects(PUE-7 "Rules for electrical installations." Section 2. Chapter 2.5.)

1. The distance from the power transmission line to the gas pipeline with parallel laying of the gas pipeline and overhead lines must be at least the height of the electric support of the overhead line, if the overhead line is up to 1 kW. When crossing a power transmission line and a gas pipeline, a protective screen isolated from the ground should be arranged above the pipes, in case of a break in the overhead line wires. The fence should protrude on both sides of the intersection of the gas pipeline from the projection of the extreme wires of the overhead line with their greatest deviation at distances of at least: 3 m for overhead lines up to 20 kV, 4 m for overhead lines 35-110 kV, 4.5 m for overhead lines 150 kV, 5 m for 220 kV overhead lines, 6 m for 330 kV overhead lines, 6.5 m for 500 kV overhead lines.

2. Distances from overhead lines to buildings, measured horizontally from the extreme wires of overhead lines with voltage up to 220 kV to the nearest parts of industrial, warehouse, administrative and public buildings and structures must be at least: 2 m - for overhead lines up to 20 kV, 4 m - for 35-110 kV overhead lines, 5 m - for 150 kV overhead lines and 6 m - for 220 kV overhead lines. The passage of overhead lines through the territories of stadiums, educational and children's institutions is not allowed.

3. The minimum distance from the power line wires to a residential building, measured horizontally with the greatest deviation of the wires, must be at least: 1.5 m to balconies, terraces and windows, 1 m - the minimum distance from the power line to the blank walls of houses. The passage of overhead lines over a residential building is not allowed, with the exception of the approaches of branches from overhead lines to inputs into residential buildings.

4. The distance from the overhead line to the road, located parallel to each other, must not be less than the value equal to the height of the overhead line supports plus 5 m. The minimum distance from the power transmission line support to the road is measured from any part of the support to the bottom of the earth embankment. Crossing overhead lines of category I highways must be carried out on anchor supports, other roads may be crossed on intermediate supports. The minimum cross section of the wires of power transmission towers passing over highways should be 25 mm2 (steel-aluminum and steel) and at least 35 mm2 (aluminum). The smallest distance from the wires of the overhead line to the roadbed must be at least 7 m. When crossing tram and trolleybus lines, the smallest distance from the wires of the overhead line to the surface of the earth must be at least 8 m.

5. The distance from the overhead line to the gas station and the external technological installations of the gas station associated with the use and storage of explosive, explosive and fire hazardous substances are set at least one and a half times the height of the power transmission line support.

6. The smallest distance from the wire of the 6-10 kV overhead line to the ground:

7 meters from the wire to the ground in a populated area;

6 meters to the ground in an uninhabited area;

5 meters - the distance between the wires of the overhead line and the earthen or water surface of difficult terrain (swamps, swamps, etc.);

3 meters minimum between power lines and inaccessible slopes of mountains, cliffs, rocks.

7. Distance from overhead lines to trees, incl. fruit trees - 2 meters horizontally. Cutting glades for overhead lines on the territory orchards optional.

As for the maximum permissible levels for the safe life of a person, the following values ​​​​of the electric field strength are accepted:
- inside residential buildings - no more than 0.5 kV/m;
- on the territory of the residential area - no more than 1 kV / m;

However, the indicated standard distances of sanitary zones near power lines, which are considered safe for humans, do not take into account the harmful effects of magnetic radiation from overhead lines, but only the electric field, and it is the influence of the electromagnetic field on a person that is sometimes tens, and sometimes hundreds of times more dangerous to health!
So how far can you live from power lines?! To ensure that power line radiation does not affect the safety of your life, multiply the values allowable distances to power lines by 10 ... It turns out that the smallest overhead power line of 10 kV overhead lines is harmless only at a distance of 100 meters from housing! Living under a power line is very dangerous, the wires of the overhead line are fraught with voltage that is in maximum contact with the corona discharge threshold. In bad weather, this discharge releases a cloud of oppositely charged ions into the atmosphere. Electric field, created by them, even at a great distance from the overhead line, can be much more than the permissible harmless values.

So how can you build a house next to power lines? There is a solution to this problem, but it is very expensive. Many builders are engaged in laying overhead power lines under the ground, since in this case the standard distance from the power line to the house is reduced to one meter. You can put the wires in special shielded boxes for safety and uninterrupted power supply.

Underground power lines are widely used in the laying of electrical networks in cities and industrial enterprises. But their cost is 2-3 times higher than the cost overhead power lines. Cables are laid in the ground, in trenches at a depth of 0.8-1.0 m, in cable channels, blocks or tunnels. The most economical is underground cable laying - up to 6 cables in one trench with a distance between cables of 0.2-0.3 m. Laying at least 20 cables is allowed in one tunnel.

In this case, anything can be built on this site, and the builders get a whole site near the power lines. However, in any case, it is necessary to provide access to underground power lines in case of an accident or maintenance work.

High-voltage power lines cause concern for people living near them. Many people notice that after a long stay under power lines, their health deteriorates.

There is an opinion that harmful electromagnetic waves change brain cells, disrupt the functioning of the whole organism and even cause cancer. But is it really harmful to live near power lines and what is the opinion of experts on this matter?

Danger of power lines: myth or reality?

From high-voltage lines, as well as from electrical appliances and wiring, 2 types of radiation come out - alternating waves and static fields. For example, you can take a socket with a voltage of 220 to 240 volts, located 1 meter from a person, and a power line with a voltage of 200 kilovolts, installed 30 meters from a residential building.

The strength of the static field decreases with distance. Therefore, the outlet and the power line will have approximately the same effect on people.

As for the variable waves, they decay more weakly, because their strength is directly proportional to the distance from the energy source. If we take similar distances, then a power line with a voltage of 6.5 kilovolts will become the equivalent of an outlet.

Moreover, in an apartment, in a country house or in an office building, many sockets are installed, there is also electrical wiring and various devices powered by current. Together, for a person, their radiation is much more harmful than the waves emanating from power lines.

There is no information that absolutely confirms that it is dangerous to live near a high-voltage line. This topic has not been fully explored. But there is an opinion that in people living near power lines, the latter causes a violation in the functioning of internal organs. But the frequency of industrial current is 50 Hz, and the human body is affected by frequencies that are much lower.

But people working with high voltage noted that after a long presence near power lines, they still had harmful effects. Most people have experienced the following symptoms:

1. constant malaise;
2. weakening of the immune system;
3. nervousness.

This is probably due to the complexity of the profession, which requires a high concentration of attention and constant composure. Scientists note that each person has a different degree of perception of power electric and magnetic fields and static radiation from power lines.

The painful condition caused by the negative effects of power lines is called "electrical allergy". In some countries, a person with such a disease has the right to move to an area far from power lines. Moreover, financial expenses and the search for housing are carried out by government bodies.

So, people of a lonely age living in a house located near power lines can be exposed to their negative impact to varying degrees. One person will constantly feel the results of the harmful effects of power lines, while the health of another will remain unchanged.

What are the consequences of living near a high voltage line?

Presumably, a power line located where a dacha, apartment, office or other premises where people are often located can be detrimental to their health. The danger of harmful radiation lies in the appearance of chronic fatigue syndrome in a person, weakened immunity and increased irritability.

Indirect evidence of this is the results of studies conducted at the Karolinska Institute in the United States. Scientists have found that prolonged exposure to electromagnetic fields increases the risk of developing cancer, heart and vascular disease, impairs reproductive function and contributes to depression.

The researchers were able to study the theory of harm to power lines, thanks to the participation in the experiment of several thousand people whose life passes near high-voltage lines. Although the exact causes of the negative effects of electromagnetic fields could not be clarified.

But scientists suggest that power lines ionize dust particles hovering next to them, and then penetrating into human lungs. In the respiratory organs, ions charge the cells, which disrupts their work.

Of course, with a long stay in a place where there is a high-voltage line, every person will learn about its harmful effects. Such an “unfavorable neighborhood” increases the likelihood of oncological diseases and disrupts the functioning of many body systems:

• nervous;
• sexual;
• immune;
• endocrine;
• hematological;
• cardiovascular.

Harmful power lines are especially dangerous for pregnant women, children, allergy sufferers and people with central nervous system diseases and immunodeficiency. This is confirmed by the reviews of people who have worked in the zone of electromagnetic radiation for more than a year.

They noted that they had severe headaches, hypertension, and visual impairment. And young men who previously did not have heart problems often have a heart attack.

How to understand if power lines pose a health hazard?

How can a person living near high-voltage lines independently determine the degree of influence of electromagnetic fields on the body? It was said above that the transmission distance of a harmful magnetic field is determined by the power of the power transmission line.

Knowing the necessary information, even on the wires, you can approximately determine the voltage class of the power line. This will tell you the number of wires in the "bundle" (phase). So, where 4 wires power is 750 kilowatts, 3 - 500 kV, 2 - 330 kV, 1 - less than 330 kV.

To set the class, you need to know the number of insulators in the string. 220 VK - 10-15 pieces, 35 kV - 3-5 pieces, 110 kV - 6-8 pieces, 10 kV - 1 insulator.

To protect people from the effects of magnetic fields, referring to the power of power lines, sanitary protection zones are established from the projection of a distant wire. Below is a list that indicates the voltage of the power line and the size of the zone in meters:

1. 750 kV - 40 m;
2. 300-500 kV - 30 m;
3. 150-220 kV - 25 m;
4. 110 kV - 20 m;
5. 35 kV - 15 m;
6. up to 20 kV - 10 m.

However, in this table, the norms for Moscow are established. But in some cases, it is precisely such regulations that are used when allocating plots for development.

Although the above-described sanitary standards were determined without taking into account the effects of a magnetic field. But today, all over the world they are talking about even more harm than from electrical radiation. And in Russia and the countries of the former CIS there is no such thing as the level of magnetic fields, and it is not standardized at all.

Therefore, before buying a summer house, a house or an apartment near power lines, it is worth inviting an ecologist to conduct a study. Experts will check and give an official opinion, legally confirmed. Also in large cities, such as Moscow, you can use the services of specialists from the Association of Independent Laboratories, who will conduct a professional environmental assessment.

For those who want to completely protect themselves from the negative effects of magnetic fields, the researchers recommend increasing the norm of the sanitary protection zone by a factor of ten. So, 100 meters is quite enough so that the human body is not affected by a weak power line. And if the property that is disintegrating near high-voltage lines has already been bought, and there is no way to sell it, then you definitely need to call in specialists who can determine the degree of potential danger.

Although to date there is no official data on the safety of power lines, their negative impact cannot be denied. After all, the majority of people living or working near power lines noted that every year their health worsens. Therefore, those who are often exposed to electromagnetic radiation need to periodically rest in ecologically clean areas - outside the city, in the forest, in the mountains or at sea.

Long-term stay for months and years of people in the zone of power lines, which emit electromagnetic waves and create an electromagnetic field, leads to negative changes in the body. This condition causes disturbances in the nervous, cardiovascular, endocrine, reproductive, hematological, immune systems and increases the risk of oncopathology.

That is why, in order to protect people from the harmful effects of the electromagnetic field along the passage high voltage line the installation of sanitary protection zones is prescribed, the size of which is set taking into account the voltage of the power transmission line.

In accordance with SanPiN No. 2971-84, sanitary protection zones for AC power transmission are determined. In particular, at a voltage of 330 kV, the size of the SPZ is twenty meters. At 500 kV, this value reaches thirty meters. Accordingly, forty-meter protection is provided for lines of 750 kV, and 55 meters for a voltage of 1150 kV.

In these zones, summer cottages and garden plots are prohibited, not to mention residential and public buildings and structures.

To determine whether high-voltage power lines really have such a detrimental effect on the human body, one can compare the distances and transmitted voltages in these structures with a conventional 220 V outlet located in our house a meter from a person.

Why are high voltage lines harmful?

Power lines emit a static field and alternating waves. However, the same radiation comes from electrical wiring, and from any electrical appliances that are in our houses and apartments. When comparing a 220 V AC outlet located a meter away from a person, and a power line transmitting a voltage of approximately 200 kV located thirty meters away, and given that the strength of the static field decreases with the square of the distance, both of these radiation sources affect approximately the same.

The calculation shows that the equivalent of a socket located a meter away from us will be a power line transmitting current with a voltage of 6.5 kV. In addition, it should be borne in mind that in our house there are several sockets, up to plus tens of meters of electrical wiring, a TV, a refrigerator, a computer, and other electrical appliances, whose radiation can be much stronger.

It follows from this that it is not worth arguing that high-voltage power lines have such a detrimental effect on the human body. On the other hand, this issue has not yet been fully studied. Theoretically, a power line, which is located near the home, can cause resonance in the body of internal organs. The industrial frequency of the current is 50 Hz, but there are no organs that respond to such frequencies in the human body and the vibrations of a lower frequency negatively affect the body. Although people dealing with high-voltage power lines often experience:

• irritability,
• decrease in immunity.

However, these manifestations may be associated with the need for constant composure, accuracy and attentiveness, which distinguishes this profession from other jobs, in which the need for increased attention arises only periodically.

The reaction of the body to radiation from power lines

In some countries, people who are very sensitive to the radiation of high-voltage lines have the right to move away from passing power lines, while the costs and search for housing are paid by the government. We spend money on the development of standards for the installation of high-voltage lines.

It has been noticed that two people of the same age can feel different effects from a nearby high-voltage power line. It can have a depressing effect on one, and the other at this time will experience a surge of energy.

The only thing that is known for certain at the moment is that there is no evidence of the harmful effects of power lines on the human body, as well as evidence of their harmlessness. That is, their certain influence on a person is known, but what it consists of is still a mystery.