site responds

In accordance with the PUE:

2.5.113. The passage of overhead lines over buildings and structures, with the exception of industrial buildings and structures of industrial enterprises made of fireproof materials, is prohibited.

Table 2.5.23. The smallest distance from the wires of the overhead line to the surface of the earth, buildings and structures in populated areas

The vertical distances from the wires of the overhead line to the industrial building or structure made of fireproof materials, with the largest sag, must be at least those given in Table. 2.5.23.

The passage of 500 kV overhead lines over buildings and structures is prohibited. As an exception, it is allowed to pass a 500 kV overhead line over fireproof industrial buildings of power plants with a vertical distance from the wires to the buildings of at least 7 m.

Metal roofs over which overhead lines pass must be grounded. The grounding resistance of roofs should be no more than that indicated in Table. 2.5.21.

The passage of overhead lines through the territories of stadiums and children's institutions is not allowed.

2.5.114. Horizontal distances from the extreme wires of overhead lines up to 220 kV with their greatest deviation to the nearest protruding parts of buildings and structures should be at least: 2 m for overhead lines up to 20 kV, 4 m for overhead lines 35-110 kV, 5 m for overhead lines 150 kV and 6 m for 220 kV overhead lines. It is allowed to reduce the indicated distances when approaching overhead lines up to 220 kV to the blank walls of industrial buildings and structures made of fireproof materials. In this case, any distance between the deflected wire and the building (structure) must not be less than that given in 2.5.113.

Horizontal distances from the extreme wires of 330 and 500 kV overhead lines to:

a) the nearest protruding parts of non-industrial buildings and structures and industrial buildings and structures of power stations and substations with the greatest deviation of the wires must be at least: 8 m for 330 kV overhead lines and 10 m for 500 kV overhead lines;

b) protruding parts of residential and public buildings, industrial buildings and structures (except for power stations and substations) with an undeflected position of the wires must be at least: 20 m for 330 kV overhead lines and 30 m for 500 kV overhead lines.

If at the specified distances from 35-220 kV overhead lines to buildings and structures with receiving radio or television equipment, the requirements of GOST 22012-82 "Industrial radio interference from power lines and electrical substations" are not met and if compliance with the requirements of GOST 22012-82 cannot be achieved by special measures (the use of remote antennas, changing the design of overhead lines, etc.) or these measures are not economically feasible, the distances from the extreme wires of the overhead lines with their undeflected position to the protruding parts of these buildings and structures should be taken in the project at least: 10 m for overhead lines 35 kV, 50 m for 110-220 kV overhead lines and 100 m for 330 kV overhead lines and more.

Power transmission line (power transmission line) is the most important component of the power equipment system, the line is designed to transmit electricity through wires. Overhead power lines are the most common, but cable lines also exist. The article contains requirements for permissible distances from power lines to residential buildings.

Appropriate security zones of power lines (permissible distance from power lines to a residential building) have been created in order to ensure the safety and reliability of electrical communications, create proper operating conditions for power lines, and also prevent accidents that can occur to a person in case of electric shock.

Regulates all norms and the minimum distance from the house and various objects to the pole of the power transmission line (power lines) PUE-7 "Rules for the installation of electrical installations".

1 . The distance to the gas pipeline from the power transmission line when the gas pipeline is laid in parallel must be at least the height of the electric pole. When crossing a gas pipeline of a power line underground, it is necessary to build a protective screen above the pipes, isolated from the ground in case of a wire break. The fence must protrude at a distance of at least: 3 m for lines up to 20 kV, 4 m for lines of 35-110 kV, 4.5 m for lines over 150 kV, 5 m for lines over 220 kV, 6 meters for lines over 330 kV, 6.5 meters for lines over 500 kV.

2 . The distance between the power line and the house, measured horizontally from the extreme wires of the line to the nearest parts of administrative, warehouse, industrial and public buildings must be at least: 2 m for lines up to 20 kV, 4 m for lines 35-110 kV, 5 m for lines over 150 kV and 6 m for lines over 220 kV. The passage of power lines through the territory of stadiums, educational or children's institutions according to the norms of PUE-7 is not allowed.

3 . Permissible distance from the house to the power lines, measured horizontally should be at least 1.5 meters to balconies and windows, at least 1 meter to the blank walls of residential buildings with the greatest deviation of the power line wires. The passage of wires over a residential building is not allowed, with the exception of branches from power lines to the input to residential buildings to the electric meter.

4 . The distance from the power line to the road, located parallel to each other, must be at least the height of the power transmission lines plus 5 m. anchor supports, other roads are allowed to cross on intermediate supports. The minimum cross-section of wires over roads should be 25 sq. mm.

5 . The smallest distance from the wire to the ground in populated areas is 7 meters, the distance from the wire to the ground in an uninhabited area should be 6 meters to the ground, 3 meters between the wires and inaccessible slopes of mountains or rocks. The distance from the wires of the power line to the trees is 2 meters.

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?

LOSE TWO SIZES IN A MONTH!

The formula for losing weight is simple - burn more calories than you consume. But how can this be achieved in practice? Exhausting yourself with complex and often dangerous diets is very risky. Spending a lot of money and time on the gym is not for everyone according to their abilities. Kartunkova called the mistake of all LOSSING WEIGHT: “Girls, just lose weight, here is the recipe: before breakfast ...”

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 100% confirming that next to high voltage line life is dangerous. 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 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, 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 reasons negative impact electromagnetic fields could not be determined.

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?

Get ready for winter!

EVERYONE should know about this! UNBELIEVABLE, BUT IT IS A FACT! Scientists have developed a unique tool that helps restore immunity and prepare it for various attacks of influenza viruses and even restore it if you are already sick. Autumn is coming, winter and spring is the time when flu activity increases, and to protect yourself and the whole family, scientists advise drinking ...

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 harmful magnetic field determined by the power of the 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 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 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 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.

PUE-7 "Rules for the installation of electrical installations". Section 2. Chapter 2.5. we read:

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 electrical support overhead line if overhead lines 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 a distance 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, must 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 down clearings for overhead lines along the territory of orchards is optional.